Southern Regional Power Committee Bengaluru
th
Minutes of the 120 Meeting of Operation Coordination
th
Committee held at SRPC, Bengaluru on 10 June 2016
1
Introduction
1.1.
The 120 Meeting of the Operation Coordination Sub Committee was conducted at Bangalore on
th
th
10 June 2016. The list of Participants is furnished at Annexure-1A.
1.2.
Shri S R Bhat, Member Secretary SRPC extended warm welcome to all the delegates to the 120
th
OCC Meeting of SRPC. On behalf of OCC, he welcomed Shri A. Anbunesan, AGM, SRLDC and
expressed hope that under his leadership at SRLDC things would further improve. He brought to
the notice of the forum the major events since last OCC meeting. A follow up meeting on
th
SCADA/Communication related issues was conducted on 17 May 2016 at SRPC with PGCIL &
Utilities. A Special Meeting was convened on 30
th
May 2016 to discuss about the draft
Compensation Procedure for SHR/AEC due to low unit loadings of the generators and for
secondary fuel consumption for additional start ups in excess of 7 start ups under RSD and its
sharing by the beneficiaries in compliance with IEGC’s 4
th
Amendment. As per the
deliberations/decision taken in that Meeting, draft procedure was updated and circulated. Further
NLDC vide letter dated 31.05.2016 had circulated the Detailed Operating Procedure for taking units
under RSD and identifying generating stations to be backed down upto technical minimum
schedule. The draft procedure was deliberated in the Commercial Sub Committee Meeting held on
02.06.2016 at SRPC Bangalore. The comments from the entities on draft Compensation Procedure
and draft Operating Procedure on RSD were awaited and the Procedures were to be finalized after
deliberations in the Meeting. A Special Meeting was held on 19
th
May 2016 at SRPC with
NPCIL/BHAVINI to deliberate on the pending issues and many actionable points were concluded.
Recalling the recent tripping occurred at Nagjheri/Gazuwaka/Tuticorin/Vallur areas, he accentuated
on the need for the Patrolling/Maintenance of critical lines and substations as envisaged in the
Patrolling Guidelines. List of critical elements/SS have already been circulated to all the concerned.
He expressed concern that a focused attention was required to ensure the patrolling and
maintenance is carried regularly as spelt out in the Patrolling Guidelines. He observed that a
number of issues were to be deliberated in OCC and because of time constraints a focused
discussion on each issue was required. He placed on record for Ramagundam Stage III, Simhadri
Stage II and NLC Stage I for achieving more than 100 % availability during May 2016.
1.3. SE (O), SRPC took up the agenda for discussions.
2
th
th
Confirmation of the Minutes of the 119 Meeting of OCC of SRPC held on 10 May 2016
NTECL stated that in respect of TANTRANSCO’s observation in 6.6.4, NTECL’s response as given
below was not recorded:
‘NTECL stated that their units comply with Emission Standards and the online data was being
transmitted to Tamil Nadu Pollution Control Board. Hence the observation of TANTRANSCO was not
correct.’
The minutes were approved with the above observation.
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
1
3
Monthly Outage Plan/ Annual Outage Plan
3.1
ISGS/CGS
3.1.1
Planned Outages of CGS/ISG stations approved during the month of June 2016/July 2016 are
enclosed at Annexure-3A.
3.1.2
Rescheduling of Planned outages of Generating Stations
SRLDC vide letter dated 20.05.2016 (Annexure-3B) had pointed out that it has been observed
that demand of SR states as well as Region as a whole is in the falling trend due to wide
spread rain which lead to significant U/D by SR entities, more export from SR grid to NEW
grid. Considering the continuing significant U/D’s , it was requested by SRLDC to all concerned
that the possibility of proponing the planned unit outages in June 2016 in proportion to the fall
in demand trend/under drawal may kindly be explored so that LGB as well as deviation could
be maintained within the limits. As per Annual Outage Plan the following units are planned in June
2016:
3.1.3
State
Station
Capacity
AP
TS
TS
TS
KAR
VTPS-1
KTPS-7
KTPS-11
RTS-B
RTPS U-2
210
120
500
210
210
Maintenance Schedule as per
Annual Outage Plan
From
To
No of
days.
15-June-16
30-Jun-16
16
16-June-16
30-Jun-16
15
1-June-16
15-Jun-16
15
16-June-16
30-Jun-16
15
15-June-16
23-Sep-16
101
TN
Tuticorin-4
210
10-June-16
24-Jun-16
15
Remarks
AOH
AOH
AOH
AOH
AMW (RH, SH,
C&I, TG)
Boiler License
Renewal & AOH
Deferment of planned outage of Unit-2 and availing of Unit-3 planned outage at NTECL
Vallur
NTECL Vallur vide letter dated 20.05.2016(Annexure-3C) had informed that in the 119
th
OCC
Meeting, Annual Outage Plan for Unit II of Vallur NTECL was approved from 21.05.2016 for 11
days. The Annual Outage for overhaul of boiler & turbine and for attending turbine vibration issue
of Unit III was approved from 01.07.2016 for 45 days in the Annual Outage Plan for FY 2016-17
approved by MoP. Unit III is kept under close monitoring since last 4 days observing increased
turbine shaft vibration. Unit was withdrawn from Grid from 12:39 hours of 20.05.2016 as per
directives from M/s BHEL since the turbine vibration exceeded the permissible limit. BHEL had
recommended for complete overhauling of the machine and accordingly NTECL is availing
planned outage of Unit III from 20.05.2016 for 45 days. It was informed by NTECL that accordingly
the Annual Outage Plan of Unit II will be taken up after bringing back Unit III on bar.
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
2
3.1.4 Change of schedule of NTPC Ramagundam Unit 5 Overhaul
3.1.4.1
NTPC vide E-mail dated 25.05.2016 (Annexure-3D) had informed that they prefer to take
shutdown of NTPC Ramagndam Unit -5 for Annual Overhaul from 01.07.2016 instead of
06.06.2016 as approved earlier. It was intimated that the Overhaul plan of other Units will be
planned accordingly and would be informed accordingly.
3.1.4.2 SRPC had informed to NTPC that SR demand had reduced and considerable under drawals were
being observed. It was noted that recently SRLDC also had brought out a letter for preponement of
Annual Maintenance of generators. NTPC was suggested to adhere to the schedule finalized in
outage plan.
3.1.4.3
3.1.5
In the meeting, the outage of Ramagundam Unit-5 was approved from 11.06.2016 to 05.07.2016.
AoH of UPCL Units
3.1.5.1 UPCL had requested to approve the shutdown of their Units as follows:
Unit
Proposed dates as per planning
From
To
Unit-1
22.07.2016
27.08.2016
Unit-2
10.06.2016
29.06.2016
UPCL informed that KPTCL vide E-mail dated 07.06.2016 had requested to reconcile the
shutdown as per KPTCL system requirement.
3.1.5.2
In the meeting, after deliberations KPTCL and UPCL agreed for the following schedule:
Unit
Revised Dates
From
To
Unit-1
17.08.2016
22.09.2016
Unit-2
20.07.2016
08.08.2016
(Correspondences in this regard at Annexure -3E)
3.2
ISTS/State Sector Transmission Lines and Elements
3.2.1
Outage proposals for the months of May/June 2016 in respect of Central and State Transmission
lines
and
elements
were
approved
and
posted
on
SRPC
website
(http://www.srpc.kar.nic.in/website/2016/operation/plout120occ.xls). All utilities are to submit the
rd
S/D proposals for the subsequent month by 3 of the current month. Shutdown requests for the
same month needed to be avoided.
An outage coordination group had been created
(sr_outage_coordiantion@googlegroups.com) for review of the previous OCC approved shut
downs (construction/critical).
3.2.2 Non-availing the OCC approved shut downs
3.2.2.1 In earlier OCC Meetings SRPC/SRLDC had stated that in spite of huge efforts being put into
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
3
finalizing
the shutdown approvals, non-availing of the same (greater than 50%) was a matter of
grim concern. Power purchase by the states was also being planned based on these approved
outages and any changes affect their LGB and in some cases ATC/TTC was also getting affected.
To bring out seriousness in the planning process it was noted that the details of the works
and preparedness also needs to be furnished in remarks column.
3.2.2.2
In the Meeting, SRLDC expressed concern that during the month of May 2016 only 36% (63 out of
179) of approved shutdowns of transmission lines & elements were availed. It was also noted that
the percentage of availed shut downs against the approved shut downs had been in decreasing
trend. It was noted lot of efforts are being put by SRPC & SRLDC to analyze and finalize the outage
approvals. The percentage of availed shut downs Vs approved shut downs during last five months
is as follows:
3.2.2.3
January 16
February 16
March 16
April 16
42.5%
42%
44%
34.9%
May 16
36%
It was agreed that SRLDC would post the approved outages availed and non-availed by 3
rd
of
every month. Subsequently constituents should revert back with the reasons for non-availing the
th
shut down by 6 of every month.
3.2.2.4
MS, SRPC expressed concern on non-availing of approved outages and requested that all efforts
should be made to minimize the deviation from schedule. He pointed out that during the grid
incidents/disturbances,
transmission
outages
(planned/unplanned/emergency)
are
viewed
seriously.
3.2.2.5
The outages availed during May 2016 on emergency basis is furnished at Annexure- 3F. AGM
SRLDC stated that the reason for applying emergency shutdown should be very clear in the
requisition for SRLDC concurrence.
3.2.2.6
SRLDC demonstrated the web based outage coordination system for requisitioning the OCC
approved
outages
on
D-3
basis
which
is
available
at
RLDC
website
http://scheduling.srldc.org:8080/OCS/Account/Login.aspx.
3.2.2.7
SRLDC clarified the following regarding the web based outage system:
a) The web base system is meant only for OCC approved outages.
b) Any deferred outage / change in dates will be treated as fresh outage. Any deferred outage
should be sent again through mail for entry by the administrator.
c) Emergency
shut
downs
remarks/reasons/justification.
could
be
applied
to
SRLDC
with
proper
d) Shutdown list for D-3 day will be available in the website for requisition. In addition, it was
agreed that D-4 & D-5 shutdown list also will be made available.
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
4
e) The web based coordination system would be put operational from 01.07.2016.
3.2.2.8
SRLDC requested SLDCs and RTAMC to kindly monitor the D-3/5 outages and ensure that
outages are taken as per approved schedule.
3.2.2.9
Constituent wise breakup of non availed shutdowns is at Annexure-3G. KSEBL had furnished
the list of outages which was not carried out as per schedule along-with the reasons (Annexure3H). TANTRANSCO informed that a number of approved outages could not be availed on
account of over loading of the network due to high demand and constraints imposed due to
election. APTRANSCO informed that 66 outages were availed on emergency basis.
3.2.2.10 SRPC/SRLDC pointed out that few constituents/utilities were not furnishing outage requests as
per specified time schedule and current month proposals for AMP works were also being
furnished. All the utilities were requested to follow the procedure and the time lines.
3.2.2.11 SE (O), SRPC requested all the utilities to furnish the details/deviations with respect to the
Annual Outage plan schedule Vs maintenance carried out on a monthly basis as this information
is required for the Annual Outage Plan Deviation Report being submitted to CERC.
3.2.2.12 AGM, SRLDC stated that in spite of huge efforts being put into finalizing the shutdown approvals,
non-availing of the same (upto 50%) was of great concern and requested SRPC to flag this issue
to upcoming TCC/SRPC.
3.2.2.13 TSTRANSCO informed that on 09.06.2016, 765 kV Raichur-Sholapur line II had been taken for
outage. It was informed to TSTRANSCO that 125 MW curtailments could be there but the actual
curtailment was only meager. These curtailments have got commercial implications on TS as the
curtailed power was being arranged through alternate means.
3.2.2.14 SRLDC clarified that during the declaration of the margins for PX the approved quantum of
LTA/MTOA are being considered. However on the day of operations, the margins would vary
depending on the LTA/MTOA requisitions. The curtailments are minimized due to margins
created due to less requisitions.
3.2.3
CEPL: request for hotline crossing permission
3.2.1.1
In the 119
th
OCC Meeting CEPL had requested permission for hot line work on 400 kV CEPL –
Tuticorin PS(TPS) and NTPL – Tuticorin PS transmission lines(PGCIL) from 10.06.2016 to
15.06.2016 (line crossing) on daily basis. CEPL was requested to carry out the hotline works in
coordination with NTPL, PGCIL SR-II and SRLDC. CEPL vide E-mail dated 07.06.2016 had
requested to accord approval for hot line crossing from 10.07.16 to 15.07.2016.
3.2.1.2
In the meeting, CEPL was requested to furnish the reason for not availing the shut down as per
previous OCC approval. Hot line works from 10.07.2016 to 15.07.2016 on the 400 kV CEPL-TPS
& NTPL-TPS were approved.
3.2.1.3
CEPL representative informed that the dedicated evacuation system for CEPL will be ready by
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
5
July 2016.
3.2.4
Shutdown request of 230 kV Mysore Bus-1 & 2 simultaneously on 23.06.16 & Shutdown
KOLAR AC Filter BUS-III from 13.06.16 to 28.06.16 on daily basis
3.2.1.4
SR II PGCIL vide letter dated 07.06.2016 (Annexure-3I) had requested shutdowns as follows:
 Shutdown request of 230 kV Mysore Bus-1 & 2 simultaneously on 23.06.16
 230 kV Mysore Bus-1 & 2 simultaneously on 23.06.16 from 10:00 to 16:00 Hrs for
stringing of Jackbus in 220 kV Switchyard under bay extension works of ICT-III. It is
mentioned that following eight 220 kV lines will be affected during the Shutdown.
1. Kushalnagar 1 & 2 (Power status : Import/export)
2. Hotagally 1 & 2 (Power status : Import/export)
3. Kadakola 1 & 2 (Power status : Import/export)
4. Golpalpura
(Power status : Import only)
5. Tubinkere (Power status : Import only)
3.2.1.4.1 In the Meeting PGCIL was requested to coordinate with KPTCL and finalise on the same since
in the event of simultaneous shut down of both buses complete Mysore power supply will be
interrupted.
 Shutdown KOLAR AC Filter BUS-III from 13.06.16 to 28.06.16 on daily basis:
 Few instances observed in May’16 wherein the support insulators for isolators of a
specific batch got failed in Hiriyur and sriperumbadur. The same batch insulators were
installed in Kolar ACF-III. Further, few insulators of the same batch found faulty in the
recent shutdown of ACF-1 & 2. In view of the above and also keeping in view the
upcoimg cyclone season in June, July & November, it is requested by SR II PGCIL that
the Shutdown Kolar ACF-3 may kindly be accorded. There will be power restriction of
1800 MW during the shutdown period.
3.2.1.4.2 In the meeting the shutdown as proposed were approved. It was noted that power flow on
Talcher-Kolar link would be restricted to 1800 MW
3.3
LGBR for upcoming five months-TTC/ATC computations
3.3.1
All states were requested to furnish PSSE base case for October 2016.
3.3.2
In the special meeting held on 26.04.2016, the following were deliberated:
 APTRANSCO, TSTRANSCO, KPTCL, KSEBL and TANTRANSCO were requested to
submit PSSE base case to SRLDC.
 As per the NPC decision/Congestion Procedure all the states were requested to publish
TCC/ATC in their respective websites.
 All the SLDCs need to have a dedicated Study Group. Manpower issues need to be
addressed suitably by the Management.
 Nominations from AP & TS for dedicated Study Group were awaited though long back,
both AP & TS had assured of nominations.
 ATC/TTC work shop was not carried out for Kerala and Tamil Nadu. It was decided that
th
th
work shop can be conducted for Kerala on 12 /13 May 2016. TANTRANSCO was
requested to suggest a date for the same. TN had informed that they would confirm within
one week and finalize date for workshop within this month.
3.3.3
th
th
It was noted that ATC/TTC workshop for KSEBL & TANTRANSCO was held on 12 /13 May
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
6
th
th
2016 & 6 /7 June 2016.
3.3.4
SRPC/SRLDC requested the states to take necessary action in this regard.
4
Availability and Requirement
4.1
DE, APTRANSCO informed that they were not anticipating any deficits till October 2016. They
had tied up with TPCIL and with the generators under Gas pooling scheme. Hinduja power
around 20 – 60 MU is expected from June – October 2016. Wind generation of around 11-17 MU
is expected till August 2016. Deficits, if any, would be met through STOA/PX purchases.
4.2
DE, TSTRANSCO informed that 9 hours agricultural power supply is being ensured from April
2016. They were likely to meet the demand comfortably in the coming months. 500MW is
expected from Kakatiya TPS II. Deficits, if any, would be met through STOA/PX purchases.
TSTRANSCO had considered generation from Singareni from June 2016 onwards in steps. It
was noted that Telangana had made an agreement with M/s CEPL (through the trader M/s My
Home Power Private Limited) as follows:
4.3
 150 MW RTC power for the period from 27.05.2016 to 25.05.2017.
EE, KPTCL informed that they would be comfortable in meeting the demand for coming months.
BTPS Unit III generation is considered for the coming months. Yeramarus TPS Generation was
considered from August 2016 onwards. He informed that the Section 11 was imposed onstate
embedded generators had been removed w.e.f 30.06.2016.
4.4
DCE, KSEBL informed that they would be in nominal deficit for the coming months. The deficits
would be met through additional STOA and through load shedding/restrictions, if required.
4.5
EE, TANTRANSCO, informed that they would be in surplus during next 5 months. Till September
they were anticipating more wind generation. 20% power cut on demand and energy for high
tension industrial and commercial consumers during non-peak hours (22:00 hrs to 18:00 hrs (next
day)) has been lifted from 05.06.2015. 90% power cut on demand and energy for high tension
industrial and commercial consumers during peak hours (18:00 Hrs to 22:00 hrs) had been
withdrawn from 05.06.2015. The above withdrawal of power cuts is being continued. Delta
(Cauvery) supply had been increased to 12 hrs from 04.06.2015.
4.6
MS, SRPC stated that more emphasis needed to be taken by all the concerned utilities to finalize
a more realistic load generation balance. Actual grid situation cannot vary drastically from the
planned one.
4.7
Reasons for demand -supply gap and its variation:
This issue of furnishing the load shedding details in different heads along with the reasons by
states had been taken up in the NPC Meetings. MoP/CEA specifically needed the reasons for
load shedding like transmission constraints, distribution constraints, regulatory constraints viz the
power purchase not allowed beyond an agreed cost or quantum, natural calamities, tripping of
some of major transmission lines etc.
SRPC requested all the constituents to kindly furnish the load shedding under different heads in
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
7
the prescribed format on monthly basis along-with power supply position data. All the constituents
agreed to furnish the reasons for demand-supply gaps including the load shedding details in the
specified format.
5
REVIEW OF THE POWER SUPPLY POSITION
5.1
Grid Highlights
 Frequency remained within IEGC range during May 2016 (49.90 - 50.05 Hz) for 69.95 % of
time. Average frequency for the month was 50.00 Hz.
 Frequency remained below 49.90 Hz for 7.54 % of time during May 2016.
 Frequency remained above 50.05 Hz for 22.51 % of time during May 2016.
 As per load duration curve the loads during May 2016 was observed to be substantially high
compare to May 2016 and marginally higher when compared to May 2015.
 Reservoir position as on 31.05.2016 was lesser by 22.2 % w.r.t. 31.05.2015. Hydro Storage
was less by around 745 MU compared to last year.
 Hydro generation was 258 MU less in the month of May 2016 when compared to 10 years
moving average with a shortfall of 8.99 %.
 Tamil Nadu had added 12 MW in windmill capacity (Private sector) during May 2016.
 Andhra Pradesh, Telangana, Karnataka, Kerala & Tamil Nadu imported 264 MU, 836 MU, 56
MU, 0.09MU & 591 MU respectively intra-regionally through bilateral exchanges.
 Andhra Pradesh, Telangana, Karnataka, Kerala & Tamil Nadu imported 83 MU, 108 MU, 293
MU, 494 MU & 982 MU respectively inter-regionally through bilateral exchanges.
 Utilities located in Tamil Nadu exported 0.5 MU inter-regionally.
 Utilities located in Andhra Pradesh, Telangana, Karnataka, Kerala & Tamil Nadu imported 130
MU, 207 MU, 181 MU, 87 MU & 23 MU respectively through Power Exchange.
 Utilities located in Andhra Pradesh, Telangana, Kerala, SEPL, MEPL & TPCIL exported 8 MU,
60MU, 4 MU, 66 MU, 67 MU & 27 MU respectively through Power Exchange.
 220 kV SS at Siddipet in Medak Dist of 2 x 100 existing MVA capacity was augmented to a
capacity of 1 x 160 + 2 x 100 MVA and was commissioned on13.05.2016 by TSTRANSCO.
 220 kV SS at Minpur in Mwdak Dist of 1 x 160+2x100 existing MVA capacity was augmented
to a capacity of 2 x160+1x100 MVA and commissioned on 14.05.2016 by TSTRANSCO.
 220 kV SS at Minpur in Nalgonda Dist of 1 x 160 + 2 x 100 MVA existing Capacity was
augmented to a capacity of 2 x 160+1x100 MVA and was commissioned on 20.05.2016 by
TSTRANSCO.
 220 kV SS at Warangal in Warangal Dist of 2 x160 + 1 x 100 existing MVA was augmented
to a capacity is of 3 x 160 MVA and was commissioned on 26..04.2016 by TSTRANSCO.
6
MAJOR ISSUES
6.1 Preparedness for meeting emergencies, if any, due to heavy monsoon/low pressure weather
Condition
6.1.1 SRLDC vide letter dated 24.05.2016 (Annexure-6A) had brought to attention of all Southern
Regional Utilities regarding the rains observed in the east coastal area during the past few days with
a possibility of crossing the shore in northern parts of Andhra Pradesh even though there were no
severe issues during these days. As the monsoon is expected to start in a couple of days and likely
wide spread heavy rains in most parts of Southern Region, all the Regional Entities were requested
to ensure necessary alertness in all the locations as well as make the following readily available to
the operators at Sub stations/Generating stations/SLDC:
a) Black Start Restoration Procedure (BSRP) documents like Single line diagram of the station
b) BSR Procedure for availing start up power
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
8
c)
d)
e)
f)
Transmission Elements outage details
Railway traction supply details
Nodal Officer details
Details of Supply for essential services
It was also requested that in case of any outage in the 220 kV line, the same may please be
communicated to SRLDC Control Room.
6.1.2 OCC noted the above.
6.2
KTTP Stage – II (1*600 MW) – Declaration of Commercial Operation
6.2.1 SRLDC vide letter dated 24.05.2016 (Annexure-6B) had submitted the following regarding the
declaration of COD of KTTP Stage – II (1*600 MW)
 As per the information at SRLDC, the Kakaitya Thermal Power Project, Stage– II (1*600 MW)
was first time synchronized at 03:02 Hrs. on 22.10.2015 and the unit was under infirm
injection since then.
 From Dec.2015 to May 2016, real time code was issued several times for synchronizing of
the unit, ramping up and ramping down of the infirm generation. Any infirm power injected
into the grid is monitored at the Regional and National level and appropriate control
measures are initiated at the RLDC level to control the infirm injection during high frequency
and load change over periods.
 SRLDC received the email dated 20.05.2016 from Telangana SLDC intimating about the
COD being declared at 12:00 Hrs on 24.03.2016.
 SRLDC expressed concern that neither the start of the trial run operation nor the CoD
declaration on 24.03.2016 was formally informed to SRLDC. Also the real time code was
taken by Telangana SLDC for injection of infirm power upto May 2016. Code No.944 on
14.05.2016 was the last code issued to Telangana SLDC to inject infirm power upto 400 MW.
It is pertinent to note that CoD status of the Units impact system Model as well as many
reports of SRLDC.
6.2.2 In the meeting, DE, TSTRANSCO informed that 72 hrs tests were completed on 24.03.2016 and
declared COD by TSGENCO; however the same was not communicated to SLDC. The information
received from TSGENCO subsequently was communicated by SLDC to SRLDC on 20.05.2016.
The COD of the unit has been sent to Commercial Division for ratification. The issue has been taken
note of and for COD of the units & elements proper procedure would be followed and SRLDC would
be intimated accordingly.
6.2.3 AGM, SRLDC pointed out that as informed earlier proper procedure on testing, declaration of COD
etc was required to be followed. He stated that all the utilities should take care in future and comply
to the provisions of Regulations.
6.3
Furnishing the newly commissioned transmission elements during the previous month in
every OCC meeting
6.3.1 SRLDC vide letter dated 01.06.2016 (Annexure-6C) had expressed concern that at present there is
no established procedure of intimating the transmission elements addition at 230 kV & below up to
110 kV. SRLDC is able to get the status of commissioning of ISTS transmission system and 400
kV/765 kV transmission elements of constituents. New transmission elements, LILO’s etc., are
being commissioned on a regular basis in Southern Region Grid and the information regarding this
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
9
additions are critical for modeling of network in SCADA & offline PSSE should reflect the actual
system for better results. The sample formats for data submission was also enclosed.
6.3.2 SRLDC requested all the entities to furnish the details of the transmission elements added upto 110
kV level in the specified formats in order to update the network model.
6.4 Providing information regarding Commissioning and Declaration of COD of Power Generating
Units
6.4.1 CEA is required to collect and record the data concerning generation, transmission and utilization of
electricity and carry out studies related to cost, efficiency, competitiveness and such like matters.
Accordingly, CEA collects online data from all Thermal, Hydro and Nuclear Generating Stations on
daily and monthly basis. Based on the same, different reports on generation and other performance
factors are prepared for reference and guidance for various stakeholders. CEA letter dated
31.05.2016 (Annexure-6D) expressed concern that for quite some time there was a gap in
communicating the commissioning and commercial operation dates of the Power Generating Units
to CEA due to that it became difficult to monitor the operational parameters and also to show the
real picture of performance indices. It was understood that all the concern power generating units
are informing dates and time to RPCs at the time of commissioning / commercially operation in
accordance with Regulation 4 of CERC (Terms & Conditions), Tariffs, Regulation, 2014. It was
requested that all the related information for date of commissioning and commercial operating of
units may kindly be informed to OPM Division of CEA so as to take all the concern units in CEA
reporting system / matter database with no delay and produce all necessary performance indices in
time to stakeholders.
6.4.2 In this regard all States/ISGS Generators/IPPs/MPPs etc were requested
to kindly inform the
details of first synchronization, COD etc as and when planned and carried out without fail to SRPC
secretariat. The information may also be sent to the following e-mail ids.
ceopmcea@yahoo.com
mgrceaopm@gamil.com
targetopmcea@gmail.com
shekhar_cea@yahoo.com
6.5
Sale of Un-requisitioned Surplus Power in Power Exchange
th
6.5.1 The issue of URS sale was discussed in the 119 OCC Meeting and after deliberations it was felt
that constituents could go through the proposal of NLC in depth and revert back within one week’s
time. The Tariff Policy clauses need to come up as a Regulation for the process to be streamlined.
6.5.2
In this context MoP vide letter dated 09.05.2016 (Annexure-6E) had mentioned the following:

Currently the utility continues to pay fixed charges towards the un-requisitioned power and
such charges are to be borne by the consumers of that utility. In the revised Tariff Policy
th
th
notified on 28 January, 2016 circulated to all concerned on 12 February, 2016, provisions
for sharing the benefits from sale of such un-requisitioned power has been made which would
not only reduce the financial burden on the utilities but also on the consumers of that utility.
The relevant provision (Para 6.2 (1) of Tariff policy are reproduced below:
“Power stations are required to be available and ready to dispatch at all times.
Notwithstanding any provision contained in the Power Purchase Agreement (PPA), in order to
ensure better utilization of un-requisitioned generating capacity of generating station, based on
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
10




regulated tariff U/s 62 of the Electricity Act 2003, the procurer shall communicate, at least
twenty four hours before 00:00 hours of the day when the power and quantum thereof is not
requisitioned by it enabling the generating stations to sell the same in the market in
consonance with laid down policy of Central Govt. in this regard. The developer and the
procurers signing the PPA would share the gains realized from sale, if any, of such unrequisitioned power in market in the ratio of 50:50, if not already provided in the PPA. Such
gain will be calculated as the difference between selling price of such power and fuel charge.
It should, however, be ensured that such merchant sale does not result in adverse impact on
the original beneficiary(ies) including in the form of higher average energy charge vis-à-vis the
energy charge payable without the merchant sale. For the projects u/s.63 of the Act, the
methodology for such sale may be decided by the Appropriate Commission on mutually
agreed terms between procurer and generator or unless already specified in the PPA.”
The above provision of the Policy emphasis that the available power, when it is not availed by
the entitled Distribution utility, should be made available in the Power market. The most
competitive power shall be procured by other needy Distribution utilities through the market.
The original Beneficiary Discom shall also get benefitted sharing of gains through sale in the
market. This shall facilitate most cost effective procurement of power by State Discoms to
cater the day-ahead requirement of power and reduce the overall cost of power purchase by
Discoms.
In order to implement the above provisions of the policy, certain changes in the existing
scheduling and dispatch procedure under Indian Electricity Grid Code (IEGC) shall be
required, which is being framed by CERC. However to start with, the State Discoms can
identify the Generating Stations (which are covered u/s.62 of the Electricity Act’03) for unrequisitioned power and communicate accordingly to respective Generating Stations,
specifying the quantum of power and duration of non-requisition, at least 24 hours in advance
of the start of scheduling from 00.00 hrs. of the day for which power is not required.
Further, State DISCOM shall also give consent to the respective Generating
Stations/Companies for sale of such URS power in the market through Power Exchange. If
such power is offered by the Generating Company (ies) and is sold in the market, then the
sharing of gains shall be applicable, as per the provisions of Tariff policy.
In view of the above and in order to implement the aforesaid provisions of Tariff Policy, it is
requested to kindly take necessary action.
6.5.3 NLC vide letter dated 03.06.2016 (Annexure-6F) further submitted the following on the above
subject:





The new tariff policy issued by the Ministry of Power vides Resolution No.23/2/2005-R&R (Vol.
IX) dt. 28.1.2016 stipulates, among other things, the following:“The procure shall communicate at least twenty four hours before 00:00 hours of the day
when the power and quantum thereof is not requisitioned by it enabling the generating
stations to sell the same in the market in consonance with laid down policy of Central
Government in this regard. The developer and the procurers signing the PPA would share the
gains realized from sale, if any such un-requisitioned power in market in the ratio of 50:50, if
not already provided in the PPA. Such gain will be calculated as the difference between
selling price power and fuel charge”.
In accordance with the above, the power generator can sell the un-requisitioned surplus power
by the beneficiaries/states/state Discoms through trading to other users and the profit can be
shared between the generator and the original procurer (respective state/DISCOM).
NLC expressed concern that even though NLC had been flagging off this issue to all
concerned for making headway but nothing concrete had emerged so far and it is gathered
during discussions that beneficiary state / Discom(s) had highlighted that by according consent
to the generator for trading the un-requisitioned power they may lose the operational flexibility.
NLC had suggested that in such a case the beneficiary Discom(s) may keep 50% of the unrequisitioned power for ensuring their operational flexibility and agree for NLC trading the
balance of 50% of un-requisitioned /surrendered power, with full accrual of the benefit to it
(NLC).
NLC had mentioned and enclosed the MoP vide letter No.3/8/2016-OM dt.19.5.2016
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
11


communicated to all concerned that the State Government / State Discom may like to give
their consent to the respective generating stations / companies for state of such URS power in
the market through Power Exchange.
In the light of the above NLC had suggested the following options:
i) The beneficiary state(s) /State Discom(s) and NLC agree to trade the full quantum of the
surrendered / un-requisitioned surplus power and the gain from trading is shared equally
between NLC and the respective the beneficiary state /Discom.
ii) If the beneficiary state(s) /State Discom(s) feel that there will be difficulties in trading of
surrendered / un-requisitioned surplus power due to operational reasons, then NLC will
go ahead with trading of 50% of the un-requisitioned power without sharing of gains.
It was requested by NLC that the above emerged views of NLC may kindly be considered with
regard and may accept the proposal either (i) or (ii) as mentioned above at the earliest, may be
within a fortnight so that continuing loss of generation on this count is avoided.
6.5.4 In this connection TANTRANSCO vide letter dated 09.06.2016 (Annexure-6G) had mentioned the
following:

During wind season, to maximize the utilization of wind generation, the allocated power from
Central Generating Stations is being surrendered as per CERC Regulations.
 Wind power is highly infirm and varies from 200 MW to 2000 MW in a day. According to
CERC (Ancillary Services Operations) Regulations, 2015, the surrendered power from Central
Generating Stations can be revoked by the original beneficiaries at any time if grid warrants.
Hence, if the infirm wind generation recedes unexpectedly after surrendering the CGS power,
the surrendered power can be revoked by the original beneficiary.
 In the above proposal, if trading agreement is executed the power cannot be revoked during
the deprived time.
 If other generators also follow suit, then TANGEDCO will be in trouble during crucial time on
account of inability to revoke the URS power surrendered or to avail the URS power
surrendered by others.
 SRLDC has already remarked in a similar request made by NTPC – Simhadri that “When the
URS Power is traded in Power Exchange and if the original beneficiary recalls their
entitlement, there is no provision in the STOA Regulations to revise such traded schedule”.
 According to Reserve Regulatory Ancillary Services (RRAS), the URS power surrendered by
the beneficiaries will be utilized as and when required at Regional level by NLDC through
RLDC. Therefore, this proposal is not beneficial to the utility. If the surplus power is
surrendered, the fixed cost may get reduced to TANGEDCO when the surrendered power is
utilized by any other constituents. But with the new proposal, TANGEDCO has to bear the
fixed cost additionally.
th
 In the 119 OCC Meeting held on 10.05.2016 also, the constituents have objected to the
above proposal and have opined that they would agree for open market sale if provision is
ensured by generator to recall the power. They have also sought amendment in STOA
Regulation which would facilitate utilization of URS and also provide flexibility to the
beneficiaries to recall the URS.
 Considering the above, it is informed that the request made by NLC is not feasible of
compliance.
6.5.5 In the meeting, NLC informed that KSEBL had given consent /NOC for sale of URS power through a
letter.
6.5.6 TANTRANSCO informed that they were not agreeable for NLC’s proposal and NOC/consent could
not be given to sell the URS power. APTRANSCO informed that a note was under circulation at
Management level in this regard. TSTRANSCO informed that the issue was under consideration
and would convey the Management decision within a week.
6.5.7 It was noted that the proposal of NLC that trading of 50% of the un-requisitioned power without
sharing of gains may not be in line with the Tariff policy.
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
12
6.5.8 AP, TS, KAR & Puducherry were requested to furnish their comments/decision on NLC’s proposal
at the earliest.
6.6
IEGC, fourth Amendment Regulations 2016- Technical Minimum of generators
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6.6.1 In the 119 OCC Meeting it was noted that 4 Amendment to IEGC had been brought out by
Hon’ble CERC in which Technical Minimum of 55 % of MCR loading or installed capacity of the unit
of the generating station had been notified and is to be implemented. Preliminary discussions for
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making the compensation procedures as envisaged in the 4 amendment of IEGC Regulations had
been initiated. SRLDC had informed that NLDC had prepared a draft procedure for RSD and
Technical Minimum and after finalization it would be circulated.
6.6.2 Subsequently a Special Meeting was convened on 30.05.2016 to discuss the Compensation
Procedure for SHR & AEC for low unit loading and for secondary fuel consumption for additional
start ups in excess of 7 start ups and it’s sharing by the beneficiaries. It was decided that the Draft
procedure would be circulated.
Accordingly, based on the deliberations in the meeting and
subsequent inputs a draft compensation procedure has been prepared by SRPC Secretariat and
had been uploaded on website.
6.6.3 Further NLDC vide letter dated 31.05.2016 had circulated the detailed Operating Procedure for
taking units under RSD and identifying generating stations to be backed down upto technical
minimum schedule. The draft procedure was discussed in the Commercial Sub Committee Meeting
held on 02.06.2016 at SRPC Bangalore. SRLDC vide letters dated 31.05.2016, 02.06.2016 and
09.06.2016 (Annexure 6H) had sought comments on the same.
6.6.4 In the Meeting, all the generators expressed that more clarity was required on both the Procedures.
The issue needed to be addressed to senior level officials. They also felt that in depth internal
discussion was required for furnishing the feedback and thereby requested for more time and
another deliberation.
6.6.5 Accordingly a special meeting/VC was convened on 20.06.2016 at SRLDC Benguluru. All the
entities were requested to furnish their feedback in respect to NLDC RSD procedure to NLDC.
Regarding the draft Compensation Procedure prepared by SRPC secretariat, SRPC informed that
excel sample calculation was available at SRPC website and all the entities were requested to go
through and furnish the comments/feedback if any.
6.7 Central Electricity Regulatory Commission(Deviation Settlement Mechanism and related
matters) {Third Amendment} Regulation 2016
6.7.1 Hon’ble CERC had brought out CERC (Deviation Settlement Mechanism and related matters) {Third
Amendment} Regulation 2016 which would be implemented with effect from 30.05.2016.
The
definition of renewable rich state and the deviation limits for renewable rich states etc. have been
specified for computation of charges and additional charges for deviation.
6.7.2 In this regard SRPC vide letter dated 30.05.2016 (Annexure-6I) had requested all the constituents
to verify the wind and solar installed capacity values which is tabulated and furnish the certified
installed capacity of wind and solar in state control area (excluding the wind/solar being
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
13
scheduled by SRLDC) by 31.05.2016 for enabling SRPC to suitably factor in DSM charges
computations. It is also requested that whenever the installed capacity increases to more than 1000
MW and more than 3000 MW, values need to be certified and communicated to SRPC. Whenever
scheduling responsibility changes from SLDC to SRLDC the revised figures are also needed to be
certified and communicated.
6.7.3 SRLDC vide letter dated 07.06.2016 had also requested the states to submit the details of installed
capacity with wind and solar shown separately as on last working day of the month. SRLDC also
clarified that in case of non-receipt of the same; the data pertaining to last month will be considered.
st
The same has been clarified in 31 CCM of SRPC held on 02.06.16. SRLDC clarified that the Wind
and solar installed capacity had been taken from Annexure 2 of SOR. SRLDC had mentioned the IC
of Wind & Solar and the DSM limits being applied:
State
Wind
Solar
Total
AP
1155.12
475.74
1630.86
200 MW
392.39
392.39
12% or 150 MW
Telangana
DSM MW Limit
Karnataka
2886.53
104.22
2990.75
200 MW
Kerala
35.10
12.025
47.13
12% or 150 MW
Tamil Nadu
7514.76
562.945
8077.71
250 MW
Pondy
0
0.025
48 MW or
12% or 150MW
6.7.4 SRLDC/SRPC requested all the constituents to furnish the installed capacity of Solar & Wind in their
states as on last working day of every month.
6.7.5 TANTRANSCO communication in this regard is at Annexure-6I-1
6.8
Replacement of faulty 200MVA, 400/132kV ICT at Ramagundam with 315 MVA, 400/220kV ICT
6.8.1 It was noted that Ramagundam 200MVA, 400/132kV ICT 2 had been under prolonged outage from
30.06.2015.
The issue of restoration of the ICT was being discussed in various forums.
Replacement of this faulty 200 MVA, 400/132kV ICT with 315 MVA, 400/220kV ICT by
TSTRANSCO was agreed in 39
th
Standing Committee. SRLDC vide letter dated 01.06.2016
(Annexure-6J) had requested TSTRANSCO that immediate action may kindly be taken for
commissioning of the new ICT as there is continuous violation of N-1 security constraints during the
peak hours due to the non-availability of the ICT, which may lead to cascade tripping and loss of
load.
6.8.2 DE, TSTRANSCO informed that ICT had reached site and commissioning/erection activities had
started. ICT was expected to be on bars by end of July 2016.
6.9
N’Sagar – Cuddapah 400 KV FSC 1 at Cuddapah – Prolonged outage
6.9.1
SRLDC vide letter dated 01.06.2016 (Annexure- 6K) had informed N’Sagar – Cuddapah FSC 1 at
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
14
Cuddapah station is under prolonged outage from 12:13 hrs of 12
th
March 2016 from due to
capacitor failure. had requested PGCIL to kindly arrange to rectify the problem at the earliest and
furnish the progress on the action plan for revival in order to ensure integrated and reliable
operation of the power system in the Southern Region.
6.9.2 CM, SR-I informed that the failed capacitors in FSC-1 were replaced with spare and commissioning
tests were under progress. Tests were expected to be completed by 18.06.2016 and FSC-1 would
be restored.
6.10
Charging clearance for SIEMENS make 80 MVAR reactor at Somanahalli in place of 63 MVAR
Reactor
6.10.1 SR II, PGCIL vide letter dated 03.06.2016 (Annexure-6L) had informed that existing defective
BHEL make 420 kV, 63 MVAR Bus reactor (Sl. No. 6005071) at Somanahalli (more than 24 years
old) has been replaced with spare SIEMENS make 80 MVAR 420 kV reactor ( Sl.No.30074/1).
Defective reactor was being sent for repair. All pre-commissioning tests on new reactor had already
been carried out and results had been cleared by OEM and Corporate AM, POWERGRID for
charging.
It was mentioned that it was not a new element/reactor and only a temporary
replacement. On repair, the old one would be put back into service. PGCIL had requested SRLDC
to kindly give charging clearance for the above.
6.10.2 In the meeting, DGM, SR-II stated that during the inspection (reactor was out due to system
constraints as per instructions of SRLDC) in May 2016, the 63 MVAR reactor was found faulty and
the same was replace with 80 MVAR reactor at Somanahalli which was available as spare.
6.10.3 AGM, SRLDC expressed grave concern that it was non –compliance of regulations and violation of
grid standards as there was no exchange of code by SRLDC and they were not informed about this
replacement of transmission element. He stated that such plan for replacement with spare reactor
was required at appropriate forum. Any maintenance during system constraint condition was to
under intimation and by exchanging code with SRLDC. The date when the element was declared
faulty was not informed to SRLDC in violation of Grid Code.
6.10.4 SE (O), SRPC stated that details in this regard were required to be furnished by PGCIL as it
impacted the Availability Computations. Grid Code provisions were required to be followed.
6.10.5 PGCIL was requested to clarify whether the replacement was with Regional spare reactor or any
other spare reactor. In this context both SR-I and SR-II were requested to indicate the details of
locations where Regional Spare ICTs & Reactors were being used / kept within a fortnight.
6.11
Frequent tripping of Vallur-NCTPS lines
6.11.1 The issue of tripping of Vallur – NCTPS Lines 1 and 2 due to insulator tracking and causing heavy
dip in voltages was under discussion May 2014.
th
6.11.2 In the 119 OCC meeting, TANTRANSCO was requested to expedite the replacement of polymer
insulators in both the lines and the following was noted:


A coordination meeting planned to discuss these issues on 19.04.2016 had not reportedly
materialized.
The line belonged to TANTRANSCO and it was TANTRANSCO’s responsibility to assure the
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
15
healthiness of the line. Tripping of these lines (and consequent tripping of units at North
Chennai or NTECL) would affect TN system more.
 It was decided that TANTRANSCO would take up the issue appropriately taking into account
the need for solving the issue urgently. NTECL was suggested to take up the concern with
Chairperson, TNEB.
6.11.3 SRLDC vide letter dated 02.06.2016 (Annexure-6M) had requested TANTRANSCO that the
replacement of insulators may please be expedited and completed at the earliest as tripping of the
lines may lead to evacuation constraints from NTECL Vallur and NCTPS Units.
It was also
requested to furnish the status of progress of the work.
6.11.4 In the meeting, EE, TANTRANSCO informed that the insulators near gantry of Vallur Switch yard
had been replaced and there were no trippings observed subsequently. NTECL, Vallur pointed out
that the insulators for complete stretch of NCTPS-Vallur were required to be changed.
6.11.5 SRPC/SRLDC expressed concern that earlier TANTRANSCO had agreed to replace the insulators
for entire length of the line but replacement was being carried out partially on case to case basis
which was not desirable. TANTRANSCO was requested to change the insulators Vallur-NCTPS
line for entire stretch.
6.12
Additional Agenda Items from KSEBL
6.12.1 KSEBL vide letter dated 07.06.2016 (Annexure-6N) has requested to include the following agenda
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items for discussion in the 120 OCC Meeting:
6.12.2 Replacement of protection couplers at 220 kV substations
The existing BPL make PLCC protection couplers at 220 kV sub stations Edappon, Edamon,
Kundara and Kayamkulam are very old and the mal-operates frequently due to stray signals
(generated from the panels). Hence, it is required the replace the panels immediately. Since the
panel replacement can be done as a pair at the two ends of the feeder, it is suggested that
procurement can be done either by KSEBL or by NTPC/PGCIL. KSEBL has requested NTPC,
Kayamkulam to intimate their willingness for procurement of Digital Protection Couplers at Edamon
and Kayamkulam by KSEBL with the cost reimbursed by M/s.NTPC/PGCIl.
M/s.PGCIL had
informed to take up the matter in the joint meetings held at Regional level.
KSEBL requested NTPC/PGCIL to revert back.
6.12.3 Enhancement of ICT ratio of 220 kV Edamon-Thirunelveli feeder at both end.
All the PGCIL owned feeders at Edamon substation (TNEM 1, 2 and Edamon - Kundara, Edamon Edappon Feeders) have CT ratio of 1600-800/1-1-1-1-1.
The conductor type of all the above
feeders are double moose with current carrying capacity of 1760 A. Considering the occasional
loading of the feeders above 800 A and also to utilize the maximum loading capacity of the feeder
during the N-1 condition, the CT at both end of the above feeders have to be connected to 1600/1A.
The 220 kV Edamon - Kundara and Edamon - Edappon feeders are now connected with CT ratio
1600/1A at Edamon end. Steps have been taken to change the CT ratio to 1600/1A at Edappon
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
16
and Kundara and for carrying more current through these feeders. The CTs at Thirunelveli may
also be connected to 1600/1A ratio.
KSEBL requested PGCIL for appropriate action at their end.
6.13 Measures to release overloading of lines in Hyderabad
6.13.1 TSTRANSCO vide letter dated 09.06.2016 had informed that in TSTRANSCO 220 KV system the
following lines especially in Hyderabad city are getting over loaded :
i) 220 kV Shapurnagar – Malkaram D/C line
ii) 220 kV Mamidiapally – Shivarampally
iii) 220 kV HIAL – Shivarampally
It was mentioned that to release over loading of above lines, the line loading of 220 kV Shankarpally
– 220 kV Gachibowli Substation is to be increased. It was requested by TSTRANSCO that SRLDC
may conduct a study on the optimum tap position at 400/220 kV Mamidiapally, Shankarpally and
other 400 kV Substations such that the support to 220 kV Gachibowli from 220 kV Shankarpally will
increase and TSTRANSCO may be advised.
6.13.2 In the Meeting, SRLDC informed that a study had been conducted in this regard and the study
report also had been submitted to TSTRANSCO. The study report is at Annexure-6O. It was noted
that tap optimization may not help in such a scenario.
6.14
Detailed procedure for Ancillary Services Operations
6.14.1 RRAS generators expressed concern that Forms AS-4 & AS-5 were not being received by them as
stipulated in Procedure. This information was sought by the Management and by the Accounts
Section to settle the bills.
6.14.2 AGM, SRLDC clarified that the nodal agency (NLDC) was issuing Up/Down regulation through
SRLDC. The RRAS instruction was for keeping the machines ready to Up/Down instruction and the
ISGS was required to follow the injection schedule which includes the RRAS instruction also.
RRAS as reason was being showed in remarks of Form “D”. The exact details of block wise
schedule were being shown for every revision and implemented schedule was available in SRLDC
website. Accordingly necessary information is already available on the SRLDC website.
6.14.3 AGM, NTPC expressed concern that their higher management were pointing out the issue
regarding the difference observed between the frequency at which the RRAS kicked in and the
average block frequency since the billing was being done on average block frequency.
6.14.4 SRLDC clarified that NLDC was preparing a monthly report on the details of timing and reasons for
kicking in, and the same was being submitted to CERC and the same would be shared with the
constituents. The Quantum conveyed by NLDC(Nodal agency) is getting changed at RLDC for
scheduling due to ramp up/ ramp down rates and other pending requisition (of beneficiaries) and
thereby forwarding the message to generators in real time may not be feasible. It was noted that the
implementation difficulties are being noted by Nodal agency and accordingly the Procedure would
be relooked after experiencing for 6 months and this clause could be modified.
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
17
6.14.5 It was felt that more clarity was required on the issue. SRLDC was requested to revert back after
discussing with NLDC on streamlining the process. RRAS generators were requested to revert back
on the exact details being sought (to be communicated to SRLDC/NLDC).
6.15
Low Generation level at NTECL Vallur
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6.15.1 The issue of low generation levels at NTECL, Vallur had been discussed in 28
th
TCC and 29
th
th
SRPC meetings held on 4 and 5 March 2016 at Visakhapatnam. The issue had also been under
discussion in previous OCC meetings.
th
6.15.2 In the 119 OCC Meeting NTECL, Vallur had informed that NTECL would be generating at full level
th
st
by 6 June 2016. 16 days shut down of the pipe conveyor had been planned by OEM from 21 May
th
2016 to 5 June 2016. The units would not be under shut down during this period and 800 MW
generations would be maintained. It was also informed that 70% of the IC of station would be
th
maintained up to 20 May 2016. Coal stocks would be improved during the low generation periods.
6.15.3 SRLDC expressed concern about the low generation levels at NTECL Vallur and opined that
whether the low generation levels at generating station for significant time can be reported under
prolonged outage.
6.15.4 DGM, NTECL informed that generation had picked up and currently they were generating around
900 MW. Shut down of pipe conveyor was delayed due to rains and heavy winds and would be
taken up from 13.6.2016 to 29.6.2016. AoH of Unit 3 and Unit 2 would be carried out during MayJuly 2016.
6.15.5 In this context, IEGC clause 5.2 (e) reproduced below was referred:
“…….Any prolonged outage of power system elements of any User/CTU/STU, which is causing or
likely to cause danger to the grid or sub-optimal operation of the grid, shall regularly be
monitored by RLDC. RLDC shall report such outages to RPC. RPC shall finalize action plan and
give instructions to restore such elements in a specified time period.”
6.15.6 After deliberations it was noted that in line with the IEGC, SRLDC may consider reporting to SRPC
sub-optimal operation of generating unit under prolonged time.
6.15.7 DGM, NTECL assured of higher availability of on bar units would be ensured once the coal handling
system issues are resolved.
6.16 Reporting of repeated failures in Thejas make SDH equipments /Healthiness of SDH, PDH,
SPS link / DTPCs at Kerala system
6.16.1 KSEBL vide letter dated 11.05.2016 (Annexure-6P) had informed that at present serious problems
were noted with Thejas make SDH Equipments installed in KSEBL stations. The system was
getting hanged several times while in operation and during the time of Video Conference. The
various issues reported to the supplier as below:
Sl.No.
1
Date
29.11.2014
2
02.09.2015
Problems reported to the Supplier
Short supply of one number Ethernet card at Vydyuthi Bhavanom,
Thiruvanathapuram
E1 link missing issues in Pothencode and recurrence of the same issue.
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
18
3
13.10.2015
4
09.02.2016
27.01.2016
09.02.2016
27.04.2016
19.10.2015
23.12.2015
25.02.2016
26.02.2016
03.03.2016
31.03.2016
27.04.2016
27.04.2016
5
6
7
8
Shifting of channels from STM 4 euipment to STM 16 at Vydyuthi Bhavanom,
Thiruvanathapuram
Failure in Video Conference links.
Failure in DCPC links.
New Video conference link configuration
Slip found in Madakkathara E1 link and continuation of the same.
SPS signal not available at Madakkathara due to channel issue.
6.16.2 Further KSEBL vide letter dated 07.06.2016(Annexure-6Q) had communicated to SRPC in this
regard and had requested to kindly arrange for solving the issues taking up with the concerned.
Status of communication equipments including SDH, PDH, SPS link / DTPCs in Kerala system was
attached. No.4 to 9 and 10 are related to the Speed Protection implemented for 765 kV, 400 kV
and Talcher-Kolar feeders. Due to the persistence of major alarms in these feeders, the SPS
signals are not received at Kerala.
The matter was already reported to that office in many
occasions. Necessary action may please be taken to solve the issues at the earliest.
6.16.3 In the Meeting, DCE, KSEBL requested PGCIL to get the issues resolved.
6.16.4 DGM, SR-II, said that they would get the issues resolved.
6.17 Fire incident at Sharavathi Generating Station
6.17.1 A major fire incident had occurred at Sharavathi Generating Station on 18.02.2016 at 16:43 hrs.
KPCL had informed that the Committee appointed on 18.02.2016 by GoK to study the issue was yet
to give the report.
6.17.2 The revival as furnished by KPCL is given below:
Unit/Transmission
Revival
Comments
Unit - 7
0745 hrs of 22.03.2016
Along
Unit - 6
02:18 hrs of 29.03.2016
Shivamoga S3 and S4
Unit - 8
03.04.2016
Elements
with
lines
to
6.17.3 In the Special Protection Meeting held on 03.06.2016 with KPCL it was noted that Order has been
placed on M/s ABB on 22.03.2016 for balance 7 Units & 7 lines with DCS adapting state of art
technology. The Implementation schedule as furnished by KPCL is given in the table below:
Delivery
from
Erection Period
Commissioning
LOA – 22.03.16
Total
period
from
LOA
(22.03.2016)
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
19
2 Units from GH
and 2 lines from
Kiosks
8
Weeks
(16.05.2016)
2
Weeks
(30.05.2016)
1
Weeks
(06.06.2016)
Another 3 Units
from GH and 4
lines from Kiosks
12
Weeks
(13.05.2016)
3
Weeks
(04.07.2016)
1
Weeks
(11.07.2016)
Another 2 Units
from GH and 1
line from Kiosks
16
Weeks
(11.07.2016)
3
Weeks
(01.08.2016)
1
Weeks
(08.08.2016)
DCS system for
the station from
C/R
24
Weeks
(05.09.2016)
2
Weeks
(19.09.2016)
2
Weeks
(03.10.2016)
11
Weeks
(06.06.2016)
Unit – 9 & 10
Sirsi Line – 1 & 2
16
Weeks
(11.07.2016)
Unit – 3, 4 & 5
ST Line – 1 & 2
Shimogga Line 1
& SB Line.
20
Weeks
(08.08.2016)
Unit – 1 & 2
ST Line – 2
28
Weeks
(03.10.2016)
6.18 Progress of NLC TS II – TS I Expansion re- conductoring works- end span work and isolator
replacement
6.18.1 In earlier meetings, SRLDC/SRPC had clarified that until unless the end portion is reconductored,
the enhancement of capacity of the line would not be considered for any of the operational
purposes and the very purpose of reconductoring as per CERC directions was not achieved.
6.19 In the Meeting, SR-II informed that BOQ is under preparation.
6.20 Preparation for meeting the revised environment norms as per Environment (Protection)
Amendment Rules,2015
6.20.1 The information in this regard is to be furnished through e-mail & letter to edmcea@yahoo.co.in &
Chief Engineer (TPE & CC),CEA, Room No.902 (S), Sewa Bhawan, R.R.Puram, New Delhi –
110066 with a copy to seoprnsrpc-ka@nic.in & srpc.operation@gmail.com
6.20.2 SE (O), SRPC requested all the generators to furnish the required information to CEA at the earliest
with a copy to SRPC.
6.21 Restricting schedule of ISGS to Normative Values/ ex-bus generation
corresponding to
100% of the Installed Capacity for ensuring RGMO Performance as per CERC order
302/MP/2013 dated 23.10.15
th
th
6.21.1 In the 118 /119 OCC Meeting SRLDC had informed that they would be restricting the schedule
to the minimum of
Normative DC taking care of the Units on bar and DC declared by the
station.They would submit the RGMO performance to Hon’ble CERC. In case the situation does not
improve SRLDC would be constrained to approach Hon’ble Commission through a Petition. If
generators and constituents have issues in this regard, they may approach Commission.
6.21.2 SRPC/constituents requested that SRLDC also furnish the quantum of restriction (DC – Restricted
Schedule of SRLDC) for ISGS stations in the report to Hon’ble CERC. SRLDC agreed for the same.
6.22 Scheduling of NTPC Ramagundam Solar Power Plant(10 MW)
6.22.1 As
discussed in the Special Meeting held on 17
th
November 2015, to facilitate scheduling by
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
20
SRLDC the following prerequisite criteria was to be met by NTPC:
 Forecasting of generation
 MW-MVAR data of the station
 Voltage at inter connecting point
 Inverter status
 SEM as per CEA, Metering Regulations, 2006
 Data compatibility with SRLDC format etc.
6.22.2 The following was noted in the earlier meeting:




NTPC had informed that the data has been extended upto NTPC switchyard
SRLDC had clarified that communication was to be established upto SRLDC and it is
the responsibility of User, in this case NTPC Ramagundam Solar was requested to
coordinate with PGCIL and get the communication through.
It was noted that forecasting of renewable generation was mandatory as per
Regulations.
NTPC had informed that data would be extended by 10.05.2016. SEMs had been
installed and were ready. Procedure for enabling the forecasting was being firmed
up.
6.22.3 In the Meeting, SRLDC confirmed that NTPC had deputed one official from Solar wing at SRLDC to
resolve the SCADA integration issue and was being attended. Link had been established and real
time data may be made through by 11.06.2016.
6.22.4 AGM, NTPC informed that NTPC would fulfill all requirements as per Regulation by this month end.
In-house forecasting based on previous day generation would be furnished till the forecasting
system is put in place.
th
6.22.5 It was noted that NTPC solar should come under RE framework w.e.f. 4 July 2016. Forecasting
could start one week earlier to get familiarized and other requirements could be arranged by.
03.07.2016.
6.23 Patrolling / Maintenance of critical lines and substations
6.23.1 In recent times insulator tracking has been observed in the Transmission lines and Substations
located in the coastal and polluted areas and SRPC vide letter dated 05.05.2016 had
communicated to the concerned in this regard. In this context, Transmission Lines and Substations
in the most vulnerable terrain, coastal and polluted areas were to be categorized for monitoring to
ensure that Patrolling and Maintenance is being carried out as per the Patrolling guidelines. The
format for furnishing the details of schedule / Patrolling and Maintenance carried out of the critical
Transmission lines and Substations had been enclosed. It had been requested to furnish the
necessary details in the specified format by 18.05.2016 positively.
6.23.2 It was noted that MEPL, SEPL, NTPC Simhadri, APTRANSCO & KSEBL had furnished the details.
(Annexure-6R). Other entities were requested to furnish the details at the earliest.
6.23.3 It was observed that APTRANSCO (partial information) and NTPC Simhadri had furnished the
details in different format. SE (O), SRPC requested the utilities to furnish the details in the specific
format which was enclosed with the SRPC communication.
6.23.4 SRPC/SRLDC requested the concerned entities to take necessary steps to ensure that Patrolling
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
21
and Maintenance is carried out as per the Patrolling Guidelines and the matter may be considered
as critical.
6.24 PSS Tuning of generators: Data requested
6.24.1 In the 2
nd
PSS meeting held on 30.10.2015 various actionable points and the station-wise schedule
of PSS tuning were finalized. The status of the actionable points is given below:


PSS details are not yet received from NTPC Stations (except Talcher STPS), NLC TS-II
exp, NTPL, CEPL, JSWEL, SEL, MEPL & TANGEDCO Stations (except NCTPS).
Schedule of PSS tuning/Step Response Test for all the units above 50 MW had been
nd
nd
st
finalized in the 2 PSS meeting. Minutes of the 2 and 1 PSS meeting available at
SRPC website may be referred for procedure for SRT/PSS tuning. The following
generators had furnished PSS Tuning/ Step Response Test reports:
NTTPS (VTPS) Units1, 2, 3, 4 & 7
SDSPP,
Krishnapatnam
Rayalaseema TPP
Kakatiya TPP Unit-I
Nagarjunasagar PH
NTECL
IL&FS Unit-I
KKNPP Unit-I
UPCL
TPCIL
Bellary TPS

The Step Response Test Reports in the specified formats to be submitted in soft form to
SRLDC (spkumar@srldc.org)/SRPC / CTU (vthiagarajan@powergridindia.com) / SRPC
(seoprnsrpc- ka@nic.in; srpc.operation@gmail.com).
6.24.2 In the Meeting, it was noted that Step Response Test had not been conducted as per schedule
finalized in the 2
nd
rd
PSS meeting. 3 meeting to review the status of PSS tuning of the generators is
proposed to be convened on 28
th
June 2016 (Tuesday) at SRPC, Bengaluru. All the
utilities/generators were requested to furnish the PSS details and Step Response Test Reports in
the specified format (soft) by 23.06.2016. PSS study committee would analyze the SRT reports
furnished by the generators at 14:30 hours on 28
th
June 2016. Committee Members are kindly
requested to be present for the analysis.
6.25 Implementation of URTDSM (PMU) project in Southern Region
6.25.1 The following were noted in the earlier meetings:
 PGCIL had informed that in the first phase, installation of 62 PMUs were under progress.
 Installation of PMU at NPS was in second phase but PGCIL had assured that they would divert
one or two PMUs to NPS for early commissioning.
 The second phase of installations of PMU would be speeded up and would be completed within
the stipulated time period.
6.25.2 In the special SCADA/communication meeting held on 17.05.2016, the constituents/generators
expressed the difficulties being faced w.r.t . PMU installations at sites under URTDSM. The
following had been finalized after deliberations. Minutes of the meeting are available at SRPC
website.
 PGCIL to furnish detailed procedure with respect to PMU installations under URTDSM project
viz, roles and responsibilities of users, responsibility upon receipt of equipment at location,
responsibilities during the installation, O&M after installation, handing over, mandatory spares /
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
22
O&M Spares responsibility etc.
 Prior communication about material supply, commissioning, installation, testing etc would be
ensured to identified Nodal Officers.
 PGCIL
Official
should
be
present
during
material
receipt
and
during
installation/commissioning/testing.
 Equipment handing over procedure should be clearly specified.
 Regarding O&M, the concerned entity would inform PGCIL regarding any issue and in-turn
PGCIL would get the issue resolved.
6.26 Video Conferencing facility at SLDCs
6.26.1 In earlier OCC Meetings, the following were noted:

APTRANSCO: Will provide the facility in new SLDC at Vijayawada. New SLDC is expected to
be commissioned by December 2016.

KPTCL: KPTCL tested VC equipment with existing VC equipment at SRLDC. Communication
link provision by Powergrid was pending.

TANTRANSCO: Administrative approval had been received and the proposal had been put
upto BLTC (Board Level Tender Committee). BLTC was not conducted due to election.

PED: Puducherry ED informed that Budget for the financial year 2016-17 had not been
approved.

SRLDC: Both side VC facilities should be made available by all SLDCs.

PGCIL: Link for backup SRLDC at NRLDC was ready and the same would be extended to
SRLDC. PGCIL, SR II need to enable the communication channel from SRLDC to back up
SRLDC.
6.26.2 In the Meeting, KPTCL confirmed that the Testing of KPTCL VC equipment compatibility with
SRLDC existing VC equipment has been completed. Communication link was yet to be provided by
PGCIL through fiber optic cable. KPTCL informed that they had taken up the issue of shifting of
SDH equipment (diverting from Hasan) to SLDC with SR-II. After deliberation, SR-II agreed to
complete the works within 15 days.
6.26.3 TANTRANSCO informed that the Board has approved the proposal and the PO would be
placed. VC facility would be commissioned within three months.
6.27
PoC data Validation
6.27.1 The PoC data to be used for July 2016 to September 2016 for SR as furnished by NLDC had been
th
circulated in 119 OCC Meeting. It was requested that suggestions/clarifications/changes, if any,
may kindly be taken up with NLDC.
6.27.2 In the Meeting, it was noted that the Validation Committee meeting for validating PoC data to be
used for July 2016 to September 2016 was held on 30.05.16.
6.28 CERC Order dated 05.10.2015 on Petition No. 310/MP/2014 wrt Un-requisitioned Power of
Sasan UMPP
6.28.1 Hearing of CERC on Petition No. 16/SM/2015 (Difficulty encountered in implementation of the
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
23
Commission`s order dated 5.10.2015 in Petition No.310/MP/2014 regarding scheduling of
unscheduled surplus power from the inter-State generating stations) was heard for 23.02.2016.
CERC Order is awaited.
6.29 Reference from MNRE regarding compilation of data for meeting renewable energy Targets of
175 GW by 2020
MNRE/ MoP /CEA vide letters dated 02.03.2016, 22.03.2016 and 29.03.2016 respectively had
communicated regarding compilation of data for meeting renewable energy targets of 175 GW by
2020. The concerned State Utilities/Generating companies are requested to furnish the data
suggested by MNRE. SLDCs are also requested to coordinate and furnish the data for the generators
in their control area.
6.30 Grid disturbance at Gazuwaka – Simhadri - Kalpakka corridor
6.30.1 On 22.04.2016 a grid disturbance occurred in the 400 kV Gazuwaka - Simhadri - Kalpakka corridor
which resulted in tripping of various 400 kV interconnected lines and finally culminated in Grid
disturbance at Gazuwaka (PGCIL), Vizag SS (APTRANSCO) and Kalpakka (APTRANSCO).
6.30.2 A Special Meeting was held on 4
th
May 2016 at SRPC, Bangalore to deliberate on this issue.
Minutes of the Meeting are at SRPC website. The following actionable measures/steps had been
envisaged in the meeting:
 Line patrolling protocol & maintenance procedures to be adhered
 Insulator replacement to be carried out upto the firmed up distance
 Hot-line/ Cold-line washing of Insulators & attending to hot-spots
 Silicon Insulator Coatings
 Reducing emissions during commissioning tests of new generating units
 Ensuring supply reliability to Railway Traction network of North Coastal Andhra Pradesh.
6.31 Near Grid miss grid separation on 18.05.2016 at 16:56 hours due to tripping of RaichurSholapur
SRLDC report on the incident on 18.05.2016 at 16:56 hrs due to tripping of Raichur-Sholapur is at
Annexure-6S.
6.32 Scheduling mismatch issue w.r.t Karnataka from DVC:
6.32.1 In the Meeting, SRLDC conveyed that the schedules could not be matched and finalised for the
following transactions on 19.05.16 and 20.05.16.
Date
19.05.16
Injectng Utility
DVC Kodarma
TPS
Buyer / Applicant
Bescom
DVC Mejia TPS
Bescom
SR
118.5 MW for 1
to 69 blocks&
75-96 and 0 for
70 to 74 Blocks
100 MW for 1
to 69 & 75-96
blocks and 0 for
70 to 74 Blocks
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
ER
237.5 MW for
96 blocks
190 MWfor 96
blocks
24
20.05.16
DVC Kodarma
TPS
Bescom
DVC Mejia TPS
Bescom
118.75 MW for
1 to 67 blocks&
other blocks
matched
100MW for 1 to
67 blocks &
other blocks
matched
237.5 MW for
96 blocks
190 MWfor 96
blocks
6.32.2 SRLDC informed that in line with the Operating Procedure mutually agreed quantum by Seller
and Buyer of LTA/MTOA transactions to be entered in SRLDC web based scheduling
program by the Applicant. In normal case, if no objection by buyer, seller and applicant with
mutually agreed figure, respective RLDC's will schedule the agreed quantum. In this particular
case DVC vide letter dated 20.05.16 (Annexure-6T) addressed to ERLDC and SLDC,
Karnataka, BESCOM regarding non-intimation of the share surrender for both LTA and
requesting BESCOM to inform DVC first before intimating to SRLDC/ERLDC. In the absence
of mutually agreed quantum, SRLDC is unable to reconcile with ERLDC /DVC. Applicant viz
Bescom was requested and reiterated to resolve the discrepancy and convey the quantum to
be corrected in the implemented schedule by both RLDCs.
6.32.3 KPTCL informed that they had filled the details a day earlier and any limitations/restrictions
should have been informed earlier. The figures of Applicant are to be implemented by both
the RLDCs as per agreed/approved procedure. In this case BESCOM/SLDC is the Applicant
and these figures are to be adopted. The non implementation of SLDC/BESCOM figures
should not put BESCOM to any disadvantage. KPTCL letter dated 15.06.2016 in this regard
addressed to MS, SRPC is at Annexure-U)
6.32.4 After deliberations, KPTCL was requested to revert back. SRLDC was requested to discuss
with ERLDC and ascertain the details. If required, separate meeting may be called.
6.33 Establishing SGPL-SRLDC Real time data link issue:
6.33.1
M/s SGPL (formerly, NCCPPL) vide E-mail dated 09.06.2016 (Annexure- 6V) has informed
th
that they have established one real time data channel (Main) on 7 October 2015 before
drawing startup power between SGPL & SRLDC via Nellore Pooling Station (PGCIL) in IEC
101 protocol. As per SRLDC advice SGPL should establish second (Standby) Real time data
link before COD & both channels should report in IEC 104 protocol. In line with above SGPL
has committed to establish both channels in IEC 104 & procured necessary hardware &
nd
software system. On 22 May 2016 SGPL succeeded to bring the data up to SRLDC
communication room and same was confirmed by pinging & loop back checking. However
from Communication room to SRLDC SAS is not successful as on date. So one channel was
converted back to IEC 101 & it is in service. SGPL is trying to establish the link since last 15
days by coordinating with ABB (our SAS OEM), PGCIL (OPGW & SDH cloud provider) &
ALSTOM (SRLDC SAS OEM). It is mentioned that In awful case SGPL will request SRLDC
to give consent to establish our both data links in IEC 101 Protocol.
6.33.2
In the Meeting SRLDC informed that SGPL representative has come to SRLDC and they
would take up the issue and resolve the issue as early as possible.
7 GRID FREQUENCY
7.1 High frequency
7.1.1 High Frequency Grid Operation
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
25
7.1.1.1 It was noted that the Regional Grid had operated above IEGC range i.e.50.05 Hz for 22.51 % of
the time. It was also noted that the frequency on some of the days was higher for considerable
periods as shown below:
Date
Percentage of time of
Frequency
50.05 Hz
More than
&< 50.2 Hz
50.2 Hz
01-May-16
30.45
0.49
04-May-16
25.90
1.74
06-May-16
30.69
0.21
08-May-16
35.07
2.08
11-May-16
26.88
0.00
21-May-16
30.07
0.28
22-May-16
26.94
0.42
23-May-16
42.01
1.18
24-May-16
29.72
1.18
25-May-16
31.32
0.07
29-May-16
44.38
0.35
7.1.1.2 SRLDC presented the underdrawal of states when frequency was above 50.05 Hz. (Annexure7A). The Constituents were advised to kindly avoid uneconomic operation at high frequencies. It
was noted that this affects the power transfer between NEW Grid and SR grid to a great extent.
SRLDC submitted a Report on under drawal in SR due to deep depression/cyclone formed over
Bay of Bengal on 06.05.2016 and was centered on South East of Nagapatanam. The report is
Annexure-7B.
7.1.1.3 SE (O), SRPC requested all the constituents that action needs be taken to stick to the schedule
since it had commercial/operational impacts even for under drawals.
7.1.2
High frequency excursions w.r.t. 5.2 (j) of IEGC during load change over and remedial
measures to arrest such instances
7.1.2.1 All SLDCs/constituents were again requested to kindly adhere to the Regulations in place or take
up with appropriate forum for any exemption / amendment. SRLDC pointed out that the issue of
sudden changes in load / generation was being taken-up with SRPC through 1.5 Notices as per
IEGC for more than two years. Following remedial measures to arrest high frequency operation in
the Grid were noted:







7.1.3
Implementation of staggered Load changeover by the constituents/DISCOMs
Moderating own generation
Restricted Governor Mode of Operation of all eligible machines to be in place
Proper load management to prevent the sharp rise in frequency.
ADMS implementation
Exploring the possibility of running in pump mode the Kadamparai and Srisailam units
Planned and advance intimation for surrender of ISGS
Reduction in purchases/MTOA/STOA transactions
Operation of Nagarjunasagar / Srisailam / Kadamparai units in pump mode
 In the meeting, EE, TANTRANSCO confirmed that all Kadamparai Units were in service and
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
26
can be operated pump mode operation. Kadamparai units had consumed 22.59 MU in pump
mode during the month of May 2016.
 It was noted that Srisailam generation was at minimum during 2015-16 and there was no
pump mode operation till date.
7.2 Low Frequency
7.2.1
It was also noted that the frequency of grid operation was at times in the lower range of IEGC. The
grid had operated below IEGC range i.e. 49.90 Hz for 7.54 % of time. It was also noted that the
frequency on some of the days was less than 49.90 Hz for significant duration as shown below:
Date
Percentage of time of frequency
<49.2 Hz
7.2.2
49.2 Hz&
49.5 Hz &
49.7 Hz &<
49.8 Hz &
<49.5Hz
< 49.7 Hz
49.8 Hz
< 49.9 Hz
26-May-16
0.00
0.00
0.63
2.57
19.93
31-May-16
0.00
0.00
0.21
2.50
16.25
The overdrawal by SR constituents at frequency less than 49.9 Hz (Annexure-7C) was presented
by SRLDC. SRLDC stated that proper demand side management measures needed to be
implemented by the constituents to curtail low frequency operation.
7.2.3
APTRANSCO informed that there was no load shedding in Andhra Pradesh during May 2016.
Bilateral Purchases of more than 460 MU had also been made from other states/regions/MPPs.
7.2.4
TSTRANSCO informed that there was no load shedding in Telangana during May 2016. Bilateral
Purchases of more than 930 MU had also been made from other states/regions/MPPs. There were
no scheduled power cuts in the state during May 2016. Agricultural supply of 9 hours was being
ensured from April 2016.
7.2.5
KPTCL informed that there was no load shedding in Karnataka during May 2016. Bilateral
Purchases of around 515 MU were also made from other states/regions/MPPs.
7.2.6
KSEBL informed that there was 3.35 MU load shedding in Kerala during May 2016. Bilateral
Purchases of more than 748 MU were made from other states/regions/MPPs.
7.2.7
TANTRANSCO informed that there was no load shedding in Tamil Nadu during May 2016.
Bilateral Purchases of around 1563 MU were made from other States/Regions/MPPs. 20% power
cut on demand and energy for high tension industrial and commercial consumers during non-peak
hours (22:00 hrs to 18:00 hrs (next day) has been lifted from 05.06.2015. 90% power cut on
demand and energy for high tension industrial and commercial consumers during peak hours
(18:00 Hrs to 22:00 hrs) had been withdrawn from 05.06.2015. The above withdrawal was being
continued.
7.2.8
PED informed that there was no load shedding in Puducherry during May 2016.
8
VOLTAGE PROFILE
8.1
Low voltage
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
27
8.1.1
It was noted that the following nodes were facing low voltages:
Station
Bengaluru
Trichur
Palakkad
Udumalpet
Cochin
Trivandrum
Nelamangala
Bidadi
Hosur
Minimum
Voltage in
kV
365
361
366
365
365
377
371
369
373
Average duration in minutes
per day when V <390 kV
524
574
317
527
460
218
266
314
444
States were to provide Under Voltage Relays and also take up capacitor installation in these
areas.
8.1.2
A meeting with SLDCs/system study groups to discuss the low voltage and an ATC/TTC issue was
held at SRPC on 26.04.2016 and many recommendations/action points had been finalized. The
minutes of the Meeting are available at SRPC website. The following were highlighted:









8.1.3
Physical Regulatory Procedure as enumerated had been agreed for implementation. Step 4
was a critical step and thus SLDCs needed to take action to avoid any situation which would
compel SRLDC to take such step.
In case Specific instructions for opening 220/230 kV and below lines were not adhered by
SLDCs it would be deemed as violation of provisions of IEGC/EA 2003.
SLDCs to take action proactively by observing falling trend/pattern of voltages even before
receipt of SRLDC messages. SLDCs to also furnish the physical regulatory measures to be
taken up at low voltage nodes in their system. It was felt that physical regulatory measures at
220 kV and below would give optimum results than physical regulatory measures by SRLDC.
SRLDC real time messages/instructions to be adhered within 15 minutes of issuance and the
action taken report should be furnished within 30 minutes.
It was noted with concern that Udumalpet- Palakkad SPS had not been activated. Further,
there could be a need for SPS for Trichur-Palakkad lines also keeping in view sustained low
voltage operation. It was agreed to have a VC with participation from SR-II, KSEBL, SRLDC &
SRPC on 27.04.2016.
As a drive, faulty capacitor banks to be rectified immediately.
Chairperson, SRPC would be kindly requested to take up the issue with the concerned since
it was threat to system integrity.
Constituents were requested to revert back on utilization (operational/commercial limitations &
possibilities) of reactive support from wind/solar units even when they are not generating.
States to furnish data of load management actions taken to overcome low voltage conditions.
SRLDC vide letter dated 26.05.2016 (Annexure-8A) addressed to KPTCL had raised the issue of
low voltage scenario at 400 kV Somanahalli S/S. It was observed by SRLDC that after unseasonal
rains in Karnataka the voltage around Bangalore area are in down trend. Considering the present
load pattern, it may be inferred that the low voltage scenario is likely to continue until appropriate
action is taken by KPTCL. Somanahalli S/S had experienced low voltage on 25.05.2016 during
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
28
morning hours. The bus voltages have dipped to 372 kV and 189 kV respectively at 11:53 hrs in
the 400 kV and 220 kV respectively. The MVAR drawal at these locations were also high in the
range of 225 to 275 MVAR. The duration of low voltage in the 400 kV side and 220 kV side
persisted for about 9% and 28% of time respectively. Persistent low voltage situation may lead to
voltage collapse and in turn cause grid incident / disturbance. In view of the above, the following
may be ensured :
a)
Maximization of VAR generation at the nearby generating stations.
b)
Healthiness of the Under Voltage relay.
It is requested to furnish the details of under voltage relay operations during the above period.
8.1.3.1 AGM, SRLDC expressed concern that no reply has been submitted by KPTCL on the
information/action sought by SRLDC vide their communication dated 26.05.2016.
8.1.4
A special meeting was held on 17.06.2016 (MOM available at SRPC website) with respect to
pending KPTCL issues the following recommendations were finalized wrt KPTCL:







8.1.5
Real time messages/instructions of SRLDC to be adhered within 15 minutes of issuance
and action taken report should be furnished within 30 minutes.
Retrofitting of Somanahalli and Hoody Capacitor Bank of 30 MVAR each to be expedited.
KPTCL to furnish the action plan within 2 weeks.
Faulty Capacitor Banks to be rectified in Bengaluru adjoining areas of KPTCL system. KPTCL
to furnish the details of faulty capacitor banks and action plan for rectification within 2 weeks.
KPTCL /SLDC would call for a meeting with BESCOM with participation at appropriate
level within 2 weeks and following issues would be taken up:
 Special drive on rectifying the faulty capacitors in BESCOM in a time bound manner with
the details of status of capacitor banks.
 Tap optimization in the distribution transformers of BESCOM (to reduce drawal of VAR)
 Study of additional capacitor requirements. This needs to be taken up by BESCOM on
urgent basis.
 Discom wise or location wise limitation on MW drawal due to low voltages and high MVAR
drawal.
 Extending scope of maintaining power factor by other consumers (presently being limited
to HT Consumers).
 BESCOM to identify feeders for Physical Regulatory Procedure based on the MVAR
drawal by the respective feeders
Senior Managements of KPTCL and BESCOM to be appraised that MW drawal capacity
had reached saturation and could be curtailed unless voltage profile is improved and also if
sub--transmission system is not strengthened on war footing basis. Future increase in loads
and even share from Yeramarus, Bellary, LTA etc., would be difficult to meet keeping in view
the voltage profile.
SLDC could envisage taking up the issue with Hon’ble KERC to ensure that BESCOM takes
appropriate steps to improve the voltage profile.
A Task Force could be set up on urgent basis to identifying the issues (Low voltages, high
MVAR drawal, strengthening of transmission & distribution system, drawal capability of
Bengaluru area , reactive requirement at DISCOMs etc) and to finalise the action plan to
resolve these issues in a time bound manner.
SRPC/SRLDC stated that concrete efforts need to be taken to improve the voltage at the above
400 kV and 220 kV Sub Stations in SR grid for safe and secure grid operation. The action plan for
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
29
mitigating the low voltage scenario in the long term also was required to be firmed up and to
shared in OCC.
8.1.6
MS, SRPC stated that action was required to be taken by the concerned entities as finalized in
26.04.2016 & 17.06.2016 meetings.
8.1.7
UV Relay
8.1.7.1 In the Special Meeting held on 26.04.2016 the following settings had been finalized for operation of
UV Relay:
KSEBL: To be implemented at Trichur, Palakkad & Kochi
Stage 1: When voltage < 380 kV and MVAR > 10% of ICT rating (HV side) for 15
minutes then the identified loads has to be disconnected.
Stage 2: When voltage < 370 kV for 5 minutes then at least 25% of additional ICT load
has to be disconnected.
KPTCL: To be implemented at Nelamangala, Somanahalli, Hoody and Bidadi
Stage 1: When voltage < 380 kV for 10 minutes then the identified loads has to be
disconnected.
Stage 2: When voltage < 370 kV for 5 minutes then at least 25% of additional ICT load
has to be disconnected.
TANTRANSCO: To be implemented at Udumalpet, Salem & Hosur
Stage 1: When voltage < 380 kV for 10 minutes then the identified loads has to be
disconnected.
Stage 2: When voltage < 370 kV for 5 minutes then at least 25% of additional ICT load
has to be disconnected.
th
8.1.7.2 In 119 OCC meeting, the following was noted:





8.1.7.3 In
KSEBL had informed that after implementation and enabling of CSS some of the critical
values from real time calculations used for real time operations based on actual drawal
started throwing erroneous values. The problem had been reported to M/s ALSTOM. UV
Relay scheme had been disabled and the matter had been addressed to PGCIL as well. It
was informed that M/s ALSTOM was looking on the issue.
KPTCL had informed that they had enabled the UV relay at Somanahalli. Procurement was
being taken up to implement the UV scheme at Nelamangala, Hoody and Bidadi.
It was noted that the logic implemented at Udumalpet is not as per recommended and the
logic was to be implemented in two stages. TN was requested to change the logic as
recommended in the special meeting. TANTRANSCO informed that it would take another
three months to implement the UV Relays at Salem and Hosur.
TANTRANSCO had informed that that SCADA data mismatch in voltages at Udumalpet was
observed. SCADA was showing voltage of 374 kV whereas voltage as informed from field
was 384 kV. PGCIL, SR II was requested to look into the matter and take immediate action to
validate the data and to rectify the issue.
SRPC had requested that Karnataka & TN SLDCs may write a letter to their protection wings
regarding UVR implementation with a copy to SRPC/SRLDC. The requirement as furnished in
the minutes of the Special Meeting and letter from Chairperson SRPC also may be referred in
that letter.
the Meeting, AGM, SRLDC expressed grave concern over the low voltages prevailing at
Somanhally, Hoody, Neelamangala, Bidadi, Palakkad, Trichur, Kochi, Salem, Udumalpet, Arasur
& Hosur and none of the locations UV relays were triggering for the system contingencies. The
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
30
following were the number of instances for UV relay operation.
8.1.7.4 AGM, SRLDC informed that there was no operation of UV Relay operation reported at Somanahalli
even though there were number of instances meeting the logic for tripping of UV relay.
Station
Neelamangala
Bidadi
Somanahalli
Hosur
Salem
Udumalpet
Palakkad
Trichur
Kochi
No of Times V<380kV
for> 10 minutes
2
2
20
6
4
14
1
20
3
8.1.7.5 EE, KPTCL informed that the reference voltage is kept at 400 kV for UV relay operation. The logic
to trip the UV Relay has been configured through SCADA. Whenever voltage goes down 380 kV,
and sustains more than 3 minutes, 25 MW loads will be tripped automatically through SCADA. 50
numbers of feeders (in five groups, each group 25 MW) were identified for this and would be
tripped on cyclically whenever logic is met. If voltage goes below further, manual (physical) tripping
of the loads was being carried out through system operators.
8.1.7.6 SRLDC/SRPC opined that 25 MW relief is not sufficient to improve the voltage to required level
and suggested KPTCL needs to implement automated scheme with higher quantum (at least 100
MW).
8.1.7.7 MS, SRPC suggested that SRLDC may furnish the details of the instances (during May 2016)
when the condition was met for UV Relay operation. KPTCL was requested to submit the details
of UV Relay operation along with the feeder tripping details as well as load relief, voltage
improvement etc.
8.1.7.8 After deliberations it was felt by forum that a separate meeting may be called for discussing this
issue along with all other pending issues with KPTCL.
8.1.7.9 Accordingly a Meeting was held on 17.06.2016 at SRPC Bangalore with KPTCL. The minutes of
the meeting are at SRPC website. The following recommendations had been finalized.

KPTCL agreed to implement automated scheme of 25 MW each at intervals of 3 minutes,
6 minutes, 9 minutes and 12 minutes (Total 100 MW) whenever the voltage remained
below 380 kV at Somanahalli by June 2016. Second stage of automated stage would get
triggered at 371 kV after 3 minutes for 50 MW and at 370 kV after 3 minutes for another 50
MW. The second stage would be implemented by June 2016.
 KPTCL agreed to implement automated schemes of UV at Nelamangala, Hoody and
Bidadi in two stages by July 2016 end. The scheme would be finalized in the meeting with
BESCOM.
8.1.7.10 With respect to Kerala SRLDC/SRPC expressed concern that UV Relay had not operated at
Thrissur even though logic has been satisfied for operation of the relay in twenty instances.
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
31
8.1.7.11 Deputy CE, KSEBL informed that they were facing problems because of the defects in the counter
of control sequence schedule of ALSTOM SCADA and at present automatic tripping was not
realized. Whenever voltage level and MVAR drawal level satisfy the logic an alarm is set to give
indication and tripping of feeders was being done manually. He stated that presently the UV
tripping is programmed and scheduled through the control. He informed that the issue was already
been reported to PGCIL and M/s ALSTOM. It was noted that KSEBL vide letter dated
08.06.2016(Annexure-8B) had addressed to SRLDC in this regard. The site engineers of M/s
ALSTOM had requested to test the calculation with two minutes timer at main control center to find
out the root cause. They had pointed that the availability of data in back up control center was with
different time stamp and hence it was not possible to conduct the test in back up control centre.
The testing may take around 6 hours and during this period the DSM may be affected. It was
requested by KSEBL that necessary support may please be extended from the SRLDC control
room during the testing period.
8.1.7.12 AGM, SRLDC informed that there was a coordination meeting with M/s ALSTOM organized by
PGCIL on 9.06.2016 in which all SCADA related issues were addressed along with KSEBL issue.
PGCIL should clearly apprise to M/s ALSTOM whether KSEBL issue is to be taken as a new item
or in the same contract.
8.1.7.13 DGM, SR II, PGCIL explained that the issue may be because of the averaging of voltage/power
values by counter for some period of time instead of instantaneous voltages. Threshold band was
required to be defined for averaging. He informed that the issue had already been appraised to M/s
ALSTOM and hoped that they would come up with solution.
8.1.7.14 SRLDC/SRPC requested SR II, PGCIL to expedite the issue with M/s ALSTOM/KSEBL and
resolve the issue on emergent basis.
8.1.7.15 It was noted that implementation of UV Relay with respect to Tamil Nadu was carried out partially
viz Stage 1 UV relay at Udumalpet whereas Stage-II at Udumalpet was yet to be implemented.
th
8.1.7.16 MS, SRPC recalled the decision taken in the 28 TCC meeting as well as the communication of
chairperson, SRPC and requested for expeditious action from TN and requested to take action to
implement the scheme in two stages at Udumalpet and at other two locations Salem and Hosur
also.
th
8.1.7.17 SE (O), SRPC recalled that in the 119 OCC Meeting, TANTRANSCO and KPTCL were requested
to communicate to their Protection wing in this regard. TN & KAR confirmed that they had taken
with their protection wings. TN & KAR were requested to take up & furnish the correspondence in
this regard.
8.1.7.18 EE, TANTRANSCO informed that the voltage variation of around 7 kV at Udumalpet was still being
observed with respect to field and SRLDC SCADA. Action for other locations viz. Salem, Hosur
was yet to be initiated. DGM, SR II, PGCIL informed that transducer at Udumalpet was tested and
was reporting healthy. The wiring and electrical connections were to be tested. It was suggested
that MRT wing of TN and PGCIL SR-II would coordinate and resolve the issue.
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
32
8.1.7.19 It was requested that all the states to enable the U/V relays and keep in auto mode as per
specified logic on urgent basis else SRLDC would be forced to approach CERC with Petition.
SRLDC requested the states to look into the issues of non triggering of UV Relay for the instances
in May’16 and furnish a report.
st
8.1.8
Installation of Shunt Capacitors (Status as on 1 May 2016 at Appendix)
8.1.8.1
SRPC requested that the information regarding installation/healthy capacitors in the required
format needed to be regularly furnished every month.
8.1.8.2
SRLDC requested that installation & ensuring healthiness of capacitor banks at distribution level
should be ensured by all the constituents. It was noted that Tamil Nadu and Kerala were furnishing
the status of healthy capacitors. AP, TS and Karnataka were also requested to furnish the status of
healthy/faulty capacitors regularly in OCC Meetings.
8.1.8.3
It was noted in the Special Meeting held on 26.04.2016, that SRLDC had conducted a Study to
ascertain requirement of capacitive compensation in low voltage areas of SR viz. Bengaluru area,
Udumalpet-Arasur-Hosur-Salem areas and Trichur-Palakkad areas. From the studies, Capacitor
requirement had been arrived as below:
Sub-Station
Nelamangala
Hoody
Somanahalli
Mywadi
Arasur
Salem
Hosur
Palakkad
Trichur
Capacitor –
Requirement in MVAR
160
185
160
275
330
210
210
12
90
Constituent wise
requirement
Karnataka-505 MVAR
Tamil Nadu- 1025 MVAR
Kerala – 102 MVAR
All states were requested to install the capacitors as suggested before December 2016 i.e. before
next high demand period for SR. Since time was limited, immediate action was required to be
taken.
8.1.8.4
In the Meeting, it was noted that no action had been taken in this regard and the capacitor
installation needed to be expedited so that voltages during next summer season could be
comfortable.
8.1.8.5
EE, KPTCL informed that the capacitor requirement finalized by SRLDC needed to be firmed up in
deliberation with BESCOM as Load factors of HT consumers were to be taken into consideration
for capacitor installation. KPTCL informed that they had addressed the issue to BESCOM
(Communication in this regard is at Annexure-8C).
8.1.8.6
EE, TANTRANSCO informed that they had communicated regarding the additional capacitor
requirement to their System Studies Group and they would be vetting the results.
8.1.8.7
DCE, KSEBL informed that their system study team was studying the capacitor requirement report
and subsequently the studies would be shared with SRLDC/SRPC.
8.1.8.8
MS, SRPC stated that SRLDC had conducted system studies on certain real time condition of low
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
33
voltages and the quantum of Capacitors to be added at specific locations has been arrived at. The
same situation was likely to recur again and the system should be geared to meet such situations.
The intent of the recommendation was to appraise to their Higher Management and also
immediate action was required. He requested that the firmed up Action Plan needs to be intimated
before next OCC Meeting.
8.2
High Voltage
8.2.1
SRLDC highlighted the severity of high voltage problem at the following nodes as given in table:
8.2.1.1
Station
Max Voltage in
kV
Vijayawada
N’Sagar
Hyderabad
Gooty
Kurnool
Khammam
Srisailam
Raichur
Narendra
Chennai
Pugalur
Malkaram
Sattenapally
Almatty
Mysore
Hassan
Mehaboobnagar
433
426
424
429
432
426
440
427
429
422
422
436
433
429
429
428
431
Average duration in
minutes per day when
V > 420 kV
1315
163
111
177
672
128
1427
156
148
81
46
1239
1155
540
54
52
739
AGM, SRLDC expressed concern that the voltages at a number nodes voltages were observed to
be very high like at Vijayawada, Hyderabad, Nagarjuna Sagar, Gooty, Kurnool, Malkkaram,
Hassan, Mysore, Srisailam, Satheenapalli, Narendra, Almathi, Raichur, Mahaboobnagar, and 765
kV stations namely NPS, Thiruvalam and Kurnool.
8.2.1.2
It was noted that SRLDC as a last resort was directing for hand tripping of number of lines to
contain over voltages. Though there was some improvement in MVAR absorption by generators,
reactors installation as envisaged should be in place to mitigate the high voltages.
8.2.2
Status review of GT Tap positions
8.2.2.1
GT tap Positions - GT taps yet to changed as per recommendation:
Station
Unit
Present
tap
and
corresponding
voltage(in kV)
Recommended Remarks
Tap
and
Corresponding
Voltage(in kV)
ISTS connected Generators:
Kaiga I
1&2
6 & 229.125
7 & 223.25
In the Special Meeting held on
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
34
Kaiga II
3&4
3 & 409.5
LKPPL St- II &
III
4 & 399
19.05.2016 it was decided that
NPCIL
would
expedite
the
procurement of 2x125 MVAR Bus
Reactors simultaneously. Further
suitable measures would be taken by
Kaiga (U1 & U2) and Kaiga (U3 &
U4) to ensure that no VAR injection
takes place (from LV side) at
voltages greater than 220 kV and
400 kV respectively. It was assured
by Kaiga U3 & U4 for absorption
upto 60 MVAR each from their Units.
Kaiga Unit 1 & 2 also assured that
absorption form their units would be
as per the corresponding capability
curve.
400 kV
APGENCO/APSLDC
IPPs of AP
It is recommended that all IPPS under
APSLDC could be advised to change their
Tap position corresponding to voltage level
of 400 kV / 220 kV.
KPCL/KAR SLDC
Kadra
All units
7 & 225.5
8 & 222.75
Kodasalli
All units
7 & 225.5
8 & 222.75
Sharavati
9
2 & 231
4 & 220
1&2
4 & 409.5
5 & 400
1,2, 3 & 4
10 & 412
11 & 400
UPCL
JSWEL
KPCL informed that tap could not be
changed due to technical problems.
Observed rotor teeth temperature
issues and OEM was called. OEM
expected during June/July 2016.
2 x 125 MVAR reactors agreed in
th
39 SCPSPSR
JSWEL agreed for tap change.
KPTCL was requested to take up
with JSWEL
TANGEDCO/TN SLDC
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
35
Tuticorin TPS
1,2,3,4 & 5
8 & 243
1
6 & 409.7
MTPS St.III
8.2.2.2
230
 TN vide their letter had informed
that as per their study for 2016-17,
it was suggested that all the
generator taps of TTPS will be
changed from the present position
of tap no 8 to tap no 10 (15.75/237
kV).
 SRPC/SRLDC stated that the Tap
positions had been recommended
by SRPC/SRLDC according to the
existing scenario and would be
reviewed every six months. As a
first step TN could go for the tap
no.10 corresponding 237 kV and
subsequently it may be reviewed
as
per
the
MVAR/voltage
conditions.
7 & 399 Would be changed by May/June
2016.
AGM, SRLDC reiterated that the GT taps of all new units getting synchronized to grid should be
kept at the nominal grid voltage level of 400 kV or 220/230 kV. SRLDC would ensure the
requirement for ISTS connected generators while SLDCs should ensure it for their embedded
generators. It was of great concern that SRLDC had taken up this issue as violation of IEGC
whereas no SLDC had responded in this regard.
8.2.3
8.2.1.1
MVAR Interchange
In the Meeting, it was requested that Nodal Officers may kindly ensure that the data reaches
SRLDC/SRPC in time (by fourth of every month) so that SRLDC can correlate it with SCADA data
and analysis could be done facilitating actions for further improvement. It was also requested that if
any data visibility problems were being faced needed to be addressed properly.
8.2.1.2
MS, SRPC stated that the recommendations finalized in the Special Meetings were required to be
implemented. He requested all the SLDCs to kindly monitor VAR absorption/injection of generating
units in their respective control areas in real-time.
8.2.1.3
Hon’ble CERC Order dated 23.12.2009 merited attention in this regard. It had been stated in the
Order that all agencies needed to provide required reactive compensation thus avoiding the need
for exchange of reactive power to/from ISTS and maintain ISTS voltage within specific range.
8.2.1.4
SRLDC informed that Black Start Workshop and MVAR capability testing at Kakatiya TPS
(Telangana) would be conducted on 14.06.2016.
8.2.1.5
On a query regarding MVAR Capability by UPCL units, UPCL stated that they would require shut
down for maintenance / fine tuning activity by OEM. SLDC, KPTCL was requested to plan &
facilitate the outage with adherence to the annual outage plan.
8.2.1.6
SRLDC/SRPC insisted that the suggestions/recommendations suggested in the MVAR reports
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
36
should be taken up seriously.
8.2.2
Tap optimization of ICTs in SR/submission of real time data
8.2.2.1
SRLDC had taken up ICT Tap optimizations studies periodically and suggest tap change action at
765/400 kV and 400/230-220 kV SS. However the optimization is effective only if it is done upto
sub transmission level. To expand optimization study to this level SRLDC had requested 230/110
kV, 220/110 kV, 220/66 kV, 210/130 kV transformer technical data and voltage data from SCADA
for peak and off peak scenario.
8.2.3
th
In the 119 OCC Meeting it was agreed that SRLDC would circulate the format including all the
information required by them. The constituents were kindly requested to furnish the information in
the prescribed format within 15 days.
8.2.4
In the Meeting, the following was updated by SRLDC:
 SRLDC had circulated the revised format vide letter dated 19.05.16 in line with the
th





decision taken in 119 OCCM.
TN and Puducherry had submitted the data in the specified format.
Data Submitted by AP & TS contains only name plate details. Requested for snap shots
and data as per revised format.
AP & TS agreed to furnish the information by next week.
Data submitted by Kerala was in the format and snap shots were also available. 220 kV
level data was furnished but 110kV side data was also needed to be furnished. KSEBL
was requested to furnish the data in the circulated format for the voltage levels 110 kV &
220 kV levels separately at peak and off peak scenario.
Data was not submitted by Karnataka. KPTCL agreed to furnish the data within a week.
8.2.5
Tap changing of Madurai ICT I & II
8.2.6
In the Meeting, SRLDC informed that tap changing of Madurai ICTs from present Tap position (11
& 11) to the tap position (13 & 13) had been completed on 08.06.2016. The original schedule was
th
for 18 March 2016. SRLDC requested that the tap changing to recommended levels may be
completed in time otherwise it won’t be useful since the system conditions may change.
rd
Status Review of Changing ICT tap position as recommended in 103 OCC Meeting
8.2.6.1
8.2.6.2
8.2.7
Regarding tap changing of 400/220 kV ICT Banks at Madakathara, KSEBL vide letter dated
12.10.2015 had communicated the implementation schedule of replacement of 6 OLTCs and the
tap changing of Madakathara ICTs from 9,9,9 to 7,7,7 would be completed before 31.05.2016.
In the Meeting, DCE, KSEBL informed that 6 OLTCs at Madakkathara had been replaced. Tap
position would be changed from 9 to 8 for time being after getting approval from their
Management. Observing the voltage difference as per load conditions and if found it advisable to
change they would further down the tap position to recommended level (7).
Regional entities to implement the steps to contain the rise in the voltages in their respective
control area stations as given below:
 Ensure Bus reactors and Line reactors are switched in.
 Capacitor banks especially at high voltage areas are switched off.
 Optimizing the GT and ICT tap positions as per the advice of SRLDC/SRPC.
 Tap optimization at lower voltage levels to be carried out by STU/SLDC in coordination
with DISCOMs.
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
37
8.2.8
8.2.8.1
 All the generating units on bar to absorb reactive power as per their capability limits.
 Operate generating units on synchronous condenser mode for VAR absorption, whenever
feasible.
 Release loads in high voltage areas keeping in view the drawl of the control area.
 Maintain drawl from grid close to schedule.
 Operate available hydro units on pump mode in high voltage nodes keeping in view the
drawl of the control area.
 Load re- arrangement, wherever feasible, may be taken up to optimize loading on trunk
lines.
 Line opening would be the last resort by SRLDC after receipt of message from the
constituents.
 Concerted action/follow up by SLDC.
Status of commissioning of Balance Bus/ Line Reactors/STATCOM as agreed in the
Standing Committee meeting
SE (O), SRPC expressed concern that virtually there was no improvement observed in the
installation of reactors in both state sector and PGCIL. PGCIL reactors were scheduled to be
commissioned from September/October 2016 onwards.
8.2.8.2
It was noted that number of reactors in the region were to be commissioned by various entities by
June/July 2016, however it was observed that the progress was not in good pace. In view of very
high voltage at some nodes, it was emphasized that urgent action needed to be taken to
commission reactors as committed.
8.2.8.3
In the special meeting with NPCIL/BHAVINI held on 19.05.2016, the following were deliberated
with respect to KKNPP reactors:
8.2.8.4

NPCIL had pointed that engineering was under progress for KKNPP Stage-II (2 x 1000 MW)
and reactors planned were 2x125 MVAR. Any enhanced/additional requirement could be
firmed up now itself since it would be easier to take care of it now itself. Subsequently, it
becomes very difficult to fulfill any additional requirements.

SRPC/SRLDC had enquired whether limitation of 100 -150 MVAR absorption (though
unrestricted capability limits are much higher) on leading side had been duly communicated to
CTU.

NPCIL had assured that they would take up the matter with CTU regarding finalization of
reactive requirements, keeping in view no absorption by the Stage- II units. Limitation of 100150 MVAR absorption for limited period but not on sustained basis would also be
communicated.
The following was noted in the meeting:

APTRANSCO: Regarding 125 MVAR reactors at Vemagiri, Kurnool & Kaplakka, LOI has
been placed on 31.05.2016 with M/s ALSTOM for bay extension works which may take
around one year (8-12 months) to be commissioned. PO had been placed for Vemagiri,
Kalpakka and Kurnool Reactors in February 2016 with M/s Siemens and would arrive site
within 3 months. SRPC/SRLDC expressed concern and requested constituents to plan the
Bay extension and Reactor in such a way that both come together and issues does not arise
during commissioning. It was noted that reactors at Chittoor and Vijayawada were added
in the proposals. It was confirmed by APTRANSCO that 80 MVAR reactor at Vemagiri has
come into service on 15.05.2015.

TSTRANSCO: Confirmed that LOI for five reactors (excluding Srisailam reactor) was ready
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
38
th
and waiting for release of PSDF funding. PSDF funding has been confirmed in the 29 April
2016 Meeting held at NRPC and was expected to be released by end of May 2016. It was
th
th
noted that reactors approved in 36 SC/39 SCPSPSR in TSTRANSCO/TSGENCO were at
Mamidipalli, Gajwel, Sankarapally, Mehaboob Nagar & Srisailam LB. Telangana confirmed
that one additional reactor of 125 MVAR at Malkaram is also envisaged along with the
scheme and all the reactors are expected within 8 months after issue of LoI. Srisailam
Reactor was being taken up by TSGENCO and they were dealing with M/s Toshiba and
update would be informed to SRPC/SRLDC. It was confirmed by SRPC that CEA had
th
approved for Srisailam reactor in the 39 Standing Committee Meeting.

KPTCL: KPTCL confirmed that Hoody reactor had been received at site and was erected on
platform. Commissioning of reactor is expected to be by end of June 2016. The works were
getting delayed since Hoody ICT restoration was being given priority. SE (O), SRPC
suggested that these two works can be delinked and erection of the reactor can be taken up.
Nelamangala Reactor will take another 6 months for commissioning. It was noted that KPTCL
nd
reactors were approved in 32 Standing Committee Meeting and were pending since long
th
time. Two reactors were to be commissioned at Davangere and Talaguppa in 39 SCPSPSR.
KPTCL was requested to initiate the actions for procurement and commissioning of newly
identified reactors now itself.

TANTRANSCO: In addition to existing proposals two reactors, in 39 SCPSPSR Almathy and
Kayathar had been approved. Regarding, Mettur reactor, TANTRANSCO informed that it
would take more time since reactor had been diverted to Karmalai S/S.

PGCIL: One bus reactor at Vijayawada would come by 25.06.16 and other reactor is shifted
to Nagapatinam. Balance reactors were expected to commission by Sept ’16. The reactor at
Vijayawada in place of shifted reactor was expected to be commissioned by December’16.
Bays at Vijayawada were ready. Forum pointed out that PGCIL should take up in OCC
before diverting the reactor. For Narendra reactor, SR-II informed that two months shut down
was required to install the new reactor in place of the old one. The commissioning is expected
by September 2016. It was noted that Cuddapah and Thiruvalam 765 kV reactors were added
in 39 SCPSPSR.

Kudgi, NTPC: NTPC informed that one reactor at Kudgi was already commissioned and for
the other commissioning works were under progress and was expected by end of June 2016.
Firefighting equipment was to be commissioned.

Kaiga GS: Kaiga GS was requested to initiate the action for both the reactors together as
agreed in the special meeting held on 19.05.2016. KGS informed that the proposal for taking
up the two reactors simultaneously was put to the HQ and the matter was pending with head
th
quarters. MS, SRPC recalled that that Chairperson, SRPC vide letter dated 19 May 2016
had taken up with the concerned entities at Management Level and hoped that appropriate
action would be initiated shortly. The same letter had been addressed to Director (O), NPCIL
also.

In 39 SCPSPSR, 2x 125 MVAR reactors had been approved at UPCL. UPCL informed that
they were waiting for CERC clearance for capitalization of proposed reactors since tariff is
determined by CERC. It was assured by UPCL that they were moving ahead with the
proposal.

It was noted Chairperson, SRPC had taken up the issue of timely implementation of the
reactors at Management Level.

SR I, PGCIL informed that for line reactors (2 x 125 MVAR) at NPS end of 400 kV NPS-Gooty
th
th
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
39
lines, foundation works were started and 15 days line shut down would be required for
commissioning of the reactors. 125 MVAR line reactors at Nellore end for 400 kV NPSNellore line were to be commissioned for which 15 days shut down of NPS-Nellore lines
would be required.

With respect to Narendra-Madhugiri D/C lines 4 reactors (4 x 63 MVAR) would come shortly.

8.2.9
All the constituents were requested to update the status of implementation of reactors on a
monthly basis with OCC data.(State wise/ location wise / status of implementation like tender
called, PO placed)
NGR bypass of Reactors
8.2.9.1
In the 119 OCC Meeting the following were noted:
th

NGR bypass for all 400 kV reactors have been completed except for the line reactors of
Nellore - Thiruvalam I & II at Nellore end.

For 765 kV line reactors, breakers were required for making NGR bypass. Breakers had
been received and works would be completed by June 2016.

The following is the status of 765 kV reactors in SR-I:
 765 kV Raichur – 240 MVAR Bus Reactor (switchable); 2 x 240 MVAR switchable
line reactors connected to Sholapur I & 2
 765 kV NPS - 240 MVAR Bus Reactor (switchable); 2 x 240 MVAR line reactors
connected to Kurnool I & 2 , would be made convertible
 765 kV Kurnool - 4 x 240 MVAR line reactors connected to Kurnool I & 2 and
Thiruvalam I & 2 , would be made convertible ; 1 x 240 MVAR Bus Reactor being
used as switchable Line Reactor in Raichur line.
 SR I and SR II were requested to submit the consolidated list of Reactors with the
status of NGR Bypass.
8.2.9.2
PGCIL, SR I and SR II had submitted the status of NGR by pass of reactors (Annexure-8D)
8.2.9.3
PGCIL informed the following:
 765 kV Kurnool-Nellore D/C: CSD was received and shut down of the lines was required for
CSD commissioning.
 NGR Bypass & CSD installation works on 765 kV Kurnool - Thiruvalam II were completed.
Shutdown of the Kurnool-Thiruvalam I for 11.06.2016 was agreed for SR I to carry out the
works.
 CSD is a control switching device which protects the CB form arcing currents and to control the
charging currents to ICT and Reactor.
8.2.9.4
AGM SRLDC stated that shutdowns can be availed during June and July 2016 for NGR bypass
provisions for all the lines and should be completed by July 2016 end.
8.2.10
Reactive Power Planning
8.2.10.1 Status update on capacitor installation is given below:
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
40
Reactive Power Planning
Utility
APTRANSC
O
32 x 7.2
4 x 14.4
APEPDCL
Srikakulam
: 5 x 2 MVAR
Vizianagaram : 2 x 2 MVAR
Visakhapatnam: 5 x 2 MVAR
Rajahmundry :10 x 2 MVAR
Eluru
: 4 x 2 MVAR
APSPDCL
April 2015
May 2015
July 2015
Aug 2015
Sep 2015
: 11 x 2MVAR
: 16 x 2 MVAR
: 1 x 2 MVAR
: 2 x 2 MVAR
: 2 x 2 MVAR
TSNPDCL
248 x 2 MVAR
TSSPDCL
249 x2 MVAR
Voltage
Remarks
level
On 33 kV Capacitors installed:
side
220 kV Ananthapur S/S : 7.2 MVAR
133 kV Kadri S/S : 7.2 MVAR
220 kV Nandyal S/S : 7.2 MVAR
132 kV YG Palem S/S: 7.2 MVAR
33/11 kV
Level
APEPDCL Vide letter dated 05.02.2016
had furnished the following: Capacitors
available:
Srikakulam:18x1 MVAR + 16 x 2 MVAR
VZNGRM: 10 x1 MVAR + 12 x 2 MVAR
VSKP: 29 x 1 MVAR + 20 x 2 MVAR
RJY: 50 x 1 MVAR + 23 x 2 MVAR
Eluru: 34 x1 MVAR +57 x 2 MVAR
11 kV level
11 kV level
18 x 2 MVAR and 7 x 1 MVAR capacitors
had been installed so far for 2016-17 and
LOA issued for 123 x 2 MVAR & 118 x 1
MVAR.
LoA issued on 29.04.2015 for 221 x 2
MVAR capacitors at 11 kV level with
supply schedule of 4 month. 38 x 2 MVAR
capacitors had been installed so far.
179 x5 MVAR
33 kV level This proposal has been dropped.
Bengaluru Tr. Zone:708.8 MVAR
Total of 1544 MVAR which were planned to
Bagalkot Tr. Zone :258.1 MVAR
be implemented new PO is placed.
Hassan Tr. Zone :136.3 MVAR
Bangalore zone had been retendered.
Mysore Tr. Zone :60.9 MVAR
Gulbarga Tr. Zone :98.60 MVAR
Tumkur Tr. Zone :281.3 MVAR
Karnataka
KSEBL
15 MVAR
66 kV
Dropped as N/w changed. To be revised
after study.
TANGEDCO 34 x 2.4 MVAR
11 kV level
16 x 2.4 MVAR
22 kV level
7 x 24 MAVR
110
level
Materials received by December 2015(All
voltage levels) Installation works would
start by January 2016 and may be
commissioned by March 2016.
kV
90 MVAR reactors will be commissioned
by July 2016
780 MVAR of capacitors at
distribution level had been
commissioned out of 1,005 MVAR
capacitors planned.
th
8.2.10.2 In the 4 NPC meeting held on 10.12.2016, the following were the decisions/actionable points
w.r.t. Reactive Power Planning:

All States to carry out reactive power planning not only at transmission level but also at
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
41

distribution level and prepare schemes to maintain voltage profile as per relevant Regulations
/ Standards.
NPC agreed that states should adopt a proactive approach in the matter of reactive power
planning, and that the provisions regarding reactive power planning similar to those mandated
in the IEGC for the CTU should be included in the respective State Grid codes. It was decided
that RPCs would follow up the matter further with the states.
8.2.10.3 MS, SRPC requested SLDCs to carry out system study and come up with additional Capacitor
th
requirement at STU/DISCOM levels. He added that in the 5 NPC Meeting it was emphasized that
on ISTS side CTU is required to study the Reactive requirement and STUs at State level.
9
Network Protection/Security issues
9.1
U/F & df/dt Relays Schemes
9.1.1
Implementation of SRPC recommended quantum
9.1.1.1
It was noted that all the States had implemented AUFR and df/dt schemes fully. All the
Constituents were requested to furnish the details of the feeders implemented in AUFR & df/dt
schemes along with the status of SCADA mapping as per the specified Formats.
9.1.1.2
In accordance with clause 9 (2) of CEA (Grid Standards) Regulations, 2010, all constituents shall
submit a detailed report of operation of AUFR at different frequencies to SRLDC and SRPC on
daily basis. It was noted that only KSEBL and PED were submitting the daily report regarding
operation of relays.
9.1.2 SCADA mapping of feeders of AUFR & df/dt schemes
9.1.2.1
As per CERC vide Order dated 27.11.2015 on Petition No. 60/MP/2014, SRPC vide letter dated
29.01.2016 had submitted the status report duly certified by SRLDC and SRPC wrt implementation
of SCADA mapping of all the constituents to Hon’ble CERC. SCADA mapping confirmation report
of KSEBL had also been submitted to Hon’ble CERC. It was noted that the SCADA mapping of
the relays was completed by Karnataka, Kerala and Puducherry.
9.1.2.2
th
In the 118 OCC Meeting SRLDC/SRPC had expressed concern that no tangible improvement
had been seen wrt TSTRANSCO, APTRANSCO & TANTRANSCO for making 100% SCADA
availability and requested them to furnish the action plan to achieve 100 % mapping in detail like
RTU requirement, plan of procurement etc. within 15 days.
9.1.2.3
In the Meeting, it was noted that no response has been received from APTRANSCO,
TSTRANSCO & TANTRANSCO in this regard.
9.1.2.4
DCE, KSEBL informed that the reconfiguration of feeders were being carried out under various
protection schemes for releasing the overlap of feeders and after commissioning of new RTUs
configuration may further change. Revised feeder list would be informed accordingly.
9.1.2.5
SRLDC vide letter dated 06.06.2016(Annexure-9A) had reported the performance of AUFR and
df/dt protection scheme for the period 16.05.2016 to 31.05.2016. AGM, SRLDC pointed out that
during the period from 16.5.2016 to 31.05.2016, the relief realization from AUFR & df/dt was
observed at 51% only for the region and requested the constituents to add more feeders under the
stages of AUFR & df/dt schemes where less relief was being realized.
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
42
9.1.2.6
DE, APTRANSCO informed that 2 more feeders with the quantum of 45 MW were mapped to
SCADA. 20 RTUs were required for 100% SCADA mapping and the procurement for 20 RTUs
was under progress which may be commissioned within 2 months.
9.1.2.7
DE, TSTRANSCO informed that 29 RTUs were to be procured for 100% SCADA mapping and
tendering process was to be initiated.
9.1.3 Observations during inspection of AUFR & df/dt relays in Substations-reg.
SRPC Secretariat had conducted inspection for AUFR/ df/dt Relays in Medchal, Bhonogir & Bibinagar
th
th
substations, during 27 & 28 May 2016. The details of observation and action to be taken have
been intimated to TSTRANSCO vide SRPC letter dated 01.06.2016 (Annexure-9B). It is requested
that the same may kindly be examined and remedial action be intimated to this office.
9.2
Special Protection Systems
9.2.1
Implementation of additional loads for KKNPP SPS
9.2.1.1
The loads for KKNPP U2 SPS were to be identified and to implement by all the constituents. It
was noted that KKNPP Unit II was expected to be synchronized by July 2016 and full load may be
achieved by October 2016.
9.2.1.2
The following was noted in the Meeting:

TANTRANSCO vide letter dated 16.05.2016 had furnished the feeder wise details with
quantum of relief expected for the KKNPP U2 SPS. Load relief of 292 MW had been identified
against the recommended quantum of 330 MW.
 KSEBL informed that they had identified the feeders for the quantum of 153 MW and wiring
part also had been completed.
 It was noted that TSTRANSCO had identified 876 MW for all SPSs including KKNPP Unit-2
 KPTCL (174 MW) load relief was yet to identify the loads. KPTCL was requested to identify the
loads and furnish the details by end of June 2016.
 As per the revised SPS loads, Puducherry ED would be required to implement 43 MW loads
(23 MW for HVDC trip signal-1 & 20 MW for KKNPP Unit-2 SPS). PED had informed that they
were ready with 25 MW loads for SPS.
 SR II, PGCIL informed that one DTPC had been handed over to Puducherry ED in the month
of May 2016. PGCIL would extend the SPS signals form Kolar after installation of DTPC by
Puducherry ED. It was noted that these signals would be extended to concerned load points by
Puducherry ED through SCADA system.
 It was noted that states needed to furnish the feeder details at the earliest so that SR-I & SR-II
could take immediate action for extending the trip signals to the concerned load points. The
actuation of SPS logic would be done only after commencing of scheduling of the unit by
SRLDC i.e above 300 MW of generation.
9.2.2 SPS Maintenance Protocol
th
th
It was noted that in 28 SRPC meeting held on 10 October 2015, SRPC had approved the SPS
th
maintenance protocol. In the 119 Meeting SR-II had informed that discussions were underway
with M/s ALSTOM and Order may be placed by June 2016.
9.2.3 Udumalpet - Palakkad SPS
9.2.3.1 In the meeting, DCE, KSEB informed that wiring at Madakathara end for 80 MW loads had
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
43
been completed but wiring at Palakkad end for 135 MW was yet to be completed. He
informed that wiring would be completed by this weekend and subsequently SPS would be
enabled.
9.2.3.2 Subsequently, KSEB vide letter dated 22.06.2016(Annexure-9C) had communicated that
the Udumalpet-Palakkad SPS was implemented. The SPS logic and loads implemented
were also furnished.
9.2.4
9.2.4.1
Extension of SPS status points to SRLDC
th
In the 119 OCC Meeting, SRLDC had informed that SPS status points also needed to be mapped
/extended to SRLDC SCADA. The intent was to monitor from SRLDC SCADA that which SPS
operated, which feeders tripped etc. SRLDC requested SLDCs/PGCIL to extend their support and
complete the activity. SRPC had recalled that the same was suggested by SRLDC in the meeting
on synchronization of 765 kV Raichur-Sholapur (18.01.2014). PGCIL had been suggested to look
into the possibility. SR I, PGCIL was requested to arrange for the needful at Raichur & Sholapur
ends.
9.2.4.2
PGCIL had informed that irrespective of type of SPS signal generated only one output is generated
in PLCC. SPS differentiation (which SPS triggered) is not possible with the present system.
9.2.4.3
In the Meeting, SE (O), SRPC stated that the objective is to receive at SRLDC the detail of SPS
logic triggered.
9.2.4.4
It was suggested that SRLDC and PGCIL would discuss and plan the possibility of extending the
SPS information through SCADA for visibility / analysis at SRLDC.
9.2.5 Extension of SPS signal 3 command to 400 kV Hoody Station
9.2.5.1 KPTCL vide letter dated 11.05.2016 (Annexure-9D) in which the following was noted:
 Load relief to be given by Karnataka State for SPS signals are as follows:
SPS Signal:
Loads in MW
Signal I:
250 MW
Signal II:
200 MW
Signal III:
109 MW
Signal IV:
193 MW
 The loads of 220kV Kolar, Malur, Sarjapura and Chinamani along with downstream loads at
220kV Hoody were considered for signal-1 load relief. In the actual case the load relief for SPS
Signal-1 is observed to be around 350 MW to 600 MW (instead of 250MW) during many SPS
operations.
 Some of the loads identified for Signal-3 and Signal-4 are overlapped and common loads of 100
MW at Anchepura, KB Cross and Nittur 220kV stations was considered for both Signal 3 & 4 and
the same have to be segregated. Hence it is proposed that the excess load relief given for SPS
Signal-1 at downstream of 220kV Hoody station be considered for Signal-3 load relief.
 KPTCL had requested to kindly arrange to extend the SPS signal-3 command to Hoody 400kV
station instead of Signal-1 sent at present. The load relief for Signal-1 will be the loads of 220kV
Kolar, Malur, Sarjapura and Chinamani substations totaling to around 250MW.
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
44
9.2.5.2 PGCIL was requested to look into the KPTCL’s request for SPS Signal-3 extention to 400 kV Hoody
SS. The scheme needed to be ratified in the PCSC meeting.
9.2.6 SPS operations
9.2.6.1 . TANTRANSCO vide letter dated 28.5.2016(Annexure-9E) had communicated the Trip Signal-1
received on 14.04.2016 at 18:44 hrs & 19:44 hrs and details of load relief obtained.
9.2.6.2 Details of SPS operation details along-with relief obtained are at Annexure-9F.
9.3
Automatic Demand Side Management Scheme (Petition No. 250/MP/2012) & GSES (Petition No.
265/MP/2012)
9.3.1 Automatic Demand Management Scheme in line with clause 5.4.2 (d) of the IEGC was to be provided
by all the constituents by 01.01.2011. It was noted that Hon’ble CERC had issued show cause notice
under Section 142 to many constituents (all the SLDCs of SR) in its ROP in Suomoto Petition No.
005/SM/2014.
9.3.2 All constituents had confirmed about the implementation and enabling of ADMS in their respective
system. SRLDC vide letter dated 04
th
Mar 2016 had appraised Hon’ble CERC about the present
status of ADMS implementation by SR constituents along with demonstration dates. Changing the set
th
points to 49.9 Hz. would be taken up in 29 TCC Meeting.
9.3.3 In the Meeting, SRLDC informed that there are no instances for ADMS operation during the month of
May 2016 for the current settings (i.e<49.8 Hz for 15 minutes). Number of instances when frequency
was below 49.9 Hz sustaining for 15 minutes were 33 (14 instances for AP and 5 instances for TN).
SRLDC suggested the forum for adopting the setting of 49.9 Hz.
9.3.4 SE (O), SRPC informed that the issue of changing the frequency setting to 49.9 Hz was discussed in
th
th
the 28 TCC/29 SRPC Meetings and it was agreed to retain the settings at 49.8 Hz till the next
TCC/SRPC meetings. He suggested that the record of the instances satisfying the logic for ADMS
operation in the Region can be maintained and put up to next TCC. It was observed that the number
of instances had come down over past few months.
9.4
Grouping of loads (IEGC clause 5.4.2 (e))
9.4.1 As per IEGC, to maintain the frequency within stipulated band and also to ensure network security,
the interruptible loads were to be arranged in four groups of loads, This was for the purpose of
scheduled power cuts/load shedding, loads for unscheduled load shedding, loads to be shed through
UF relays, df/dt relays and loads to be shed under any SPS scheme. These loads are to be grouped
in such a manner that there is no overlapping between different groups of loads.
9.4.2 The issue was noted for compliance by the concerned utilities. SRLDC requested all the states to
kindly furnish the updated details in this regard.
9.5
Tripping Details/Reports
9.5.1 In various forums SRLDC had raised concern that it was not getting tripping information/data within 24
hrs as per IEGC/CEA regulations and sometimes the information from both the ends was not being
received. Also at times, tripping details only were being received without DR& EL details. SRLDC was
unable to analyze events on account of non-receipt of details of tripping in a timely manner. SRLDC
had stated that all tripping details should be uploaded on the SRLDC web portal. Para 29 of Hon’ble
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
45
CERC Order dated 20.02.2014 in respect of Petition No.146/MP/2013 was brought to attention of the
OCC. Non furnishing of timely tripping details would be treated as non-compliance. Procedure for
timely furnishing information was needed to be streamlined by the utilities. It was noted that tripping
information details were to be uploaded within the stipulated time frames.
9.6
Declaration of availability and healthiness of various protection / defense mechanism
9.6.1 SRLDC stated that the healthiness certification was not being received in timely manner from all the
constituents.
9.6.2 MS, SRPC stated that healthiness certificates and other reports were being sought as per directives
of higher bodies. Validated certificates needed to be communicated in a timely manner.
9.7
Contingency plan for loss of wind generation
In the Meeting SRPC/SRLDC requested KPTCL to come up with an action plan for the
implementation of contingency plan for sudden loss of wind generation in line with TN.
9.8
LVRT Implementation
9.8.1 Hon’ble CERC has passed Order in respect of Petition No. 420/MP/2014 on 05.01.2016. The Order
directs a number of actionable points by various utilities for compliance of LVRT, CEA & CERC
Regulations etc. Two special Meeting were conducted at SRPC Bangalore on 05.02.2016 &
18.04.2016 (Meeting minutes are available at SRPC website). In the meetings, various actionable
points had been finalized under the following heads:





LVRT requirements for WTGs
LVRT requirements for Solar Generating Stations
Commercial mechanism for offsetting cost of LVRT installation if it is technically viable
Type Certification should be made part of Turbine Test Certification in case of retrofitting
Data Acquisition System/Real Time Data Availability of SCADA system as envisaged in
the IEGC
 Renewable Energy generators are required to do proper forecasting and scheduling and
demand estimation by SLDCs in compliance with Grid Code
 Study of line loading in STU network and strict N-1 compliance by expediting Works
under progress, particularly wind evacuation system.
 Compliance of the Central Electricity Authority (Technical Standards for Grid Connectivity)
(Amendment) Regulations, 2013 by new generating units being commissioned and
getting connected to the grid.
 Implementation of contingency demand disconnection scheme for mitigating impact of
sudden loss of wind generation in line with order dated 22.2.2014 in 120/MP/2011.
 Implementation of LVRT, CEA/CERC Regulations for all WTGs commissioned from
15.04.2014.
9.8.2 In the Meeting, it was noted that there was no noticeable progress on actionable points viz.,
nominations of Nodal Officers was pending from the AP SLDC, KAR SLDC and KER SLDC, details of
LVRT were yet to be submitted by all the entities as per the Format A & B (received partial information
from TN and discussed in 2
nd
LVRT meeting) etc. SRLDC vide letter dated 07.06.2016 (Annexure-
9G ) had expressed concern that no significant progress has happened even after two Meetings held
in this regard at SRPC Bangalore on 05.02.2016 and 18.04.2016 in which various actionable points
also had been finalized. Entities were requested to furnish the details as sought to SRPC/SRLDC by
rd
23 June 2016. Minutes of the meeting on ‘CEA notification on the connectivity to the Grid (LVRT)’
held on 12.05.2016 at NIWE is at Annexure-9H.
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
46
9.8.3
rd
3 LVRT meeting to discuss the status on above issues is proposed to be convened at 10:30 hrs on
th
5 July 2016 (Tuesday) at TNEB office, Anna Salai, Chennai.
9.8.4 SRLDC/SRPC requested all the constituents to ensure provision and enabling of LVRT feature in all
the upcoming wind/solar generators before declaring COD. SLDCs were requested to approve
connectivity to new generators only on confirmation of availability of LVRT feature and other
CEA/CERC requirements.
9.9
Formulation of plan for procurement and Placement of Emergency Restoration System (ERS)
in the country
9.9.1 As per ERS requirement outlined in MoP letter dated 05.12.2014 status update on ERS is given
below:
Transmission
Utility
Requirement
as per MoP
APTRANSCO
3 Nos.
TSTRANSCO
1 No.
KPTCL
KSEB
2 No.
1 No.
TANTRANSCO
2 Nos
PED
PGCIL
Nil
4 Nos. ( 2
Nos
additional)
Existing
Status/Remarks
ERS I – Placed at Nellore.
ERS II – Received on 25.04.2016 and
would be kept at Vizag.
ERS III- Tenders are floated
Tendering under process.
2 Nos.
Appeared not to be feasible as per the
assessment. KSEBL agreed to reconsider.
Proposal had been sent for approval
2 Nos (SR I
& SR II was
having 1 No.
each)
Order had been placed. Would be kept at
Vizag and Chennai. Expected by June
2016
TSTRANSCO suggested that one ERS
could be kept at Hyderabad.
765 kV ERS (one each for SR-I & SR-II)
under process.
9.9.2 TSTRANSCO vide letter dated 31.05.2016 (Annexure-9I) had furnished the details about the
procurement plan of ERS is as below:
1.
Availability of number of ERS sets and their
deployment
Nil
2.
Number of additional ERS set planned to be
procured
1 No.
3.
Present status of procurement action of
additional ERS set
In the process of calling of Tenders
4.
Expected date of receipt of additional ERS sets
and their proposed deployment
1 Year
9.10
Status review of Implementation of Protection Audit/PCC recommendations as mentioned in
various CERC orders
9.10.1 Phase- I & Phase-II activities identified in Protection Audit need to be completed in a time bound
manner. Timelines given to Constituents vide various Orders of Hon’ble CERC are given below
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
47
please:
Sl.No Constituent CERC Petition
No. /Date of
Order
1
2
3
4
Date for
Date for
Remarks
completion of completion
Phase-I
Phase-II
activities
activities
APGENCO 146/MP/2013
Affidavits dt: 06.09.2014 &
APGENCO informed vide
Date of Order : 17.09.2014 were filed on
their letter dated 17.02.2016
20.02.2014
behalf of APGENCO in that the process of filing
CERC duly stating that the single Affidavit on behalf of
implementation of Phase-l & APGENCO
Thermal
&
Phase-II
activities
of Hydel stations in CERC is
Thermal & Hydel Stations under process to consider
would be completed by 31- for extension of time up to
05-2015
&31-12-2015 30.07.2016 & 31.12.2017
respectively, pursuant to respectively
for
CERC
order
dated implementation of all the
20.02.2014
against
the identified
activities
of
Petition No.146/MP/ 2013.
APGENCO
Thermal
&
Hydel Substations.
‘Taking note of difficulty
APTRANSC IA No10/2016 in 31.08.2016
31.08.2016
projected by the petitioner,
O
Petition No
we allow time to the
95/MP/2015
petitioner till 31.8.2016 as a
Date of Order :
last
opportunity
for
15.06.2016
completion of Phase-I and
Phase-II of protection audit
remarks failing which the
petitioner shall be liable for
proceedings under Section
142 of the Electricity Act,
2003 and other relevant
provisions.’
TSGENCO 146/MP/2013
TSGENCO made Affidavit
TSGENCO informed that
Date of Order : dt: 16.12.2014 on status of
their management is in the
20.02.2014
implementation of Phase-I
process
of
filing
an
and
Phase-II
activities
application before CERC
pursuant to CERC order
for obtaining further time
dated 20.02.2014 (Petition
extension.
No.
146/MP/2013) and
informed to
complete
the above
subject
work on 31.08.2015.
TSTRANSC 83/MP/2015
31.10.2015
31.08.2016
TSTRANSCO informed that
O
Date of Order :
Phase-I activities are under
14.5.2015
advanced
stage
of
completion as Erection &
commissioning of the same
are in progress.
(Ref: PCSC-51 held on
25.02.2016)
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
48
5
KPCL
Petition
No. 31.12.2016
265/MP/2015
31.12.2016
374/MP/2014
31.10.2015
Date of Order :
18.8.2015
31.12.2015
6
KPTCL
374/MP/2014
15.1.2016
Date of Order :
18.8.2015
15.1.2016
7
KSEBL
86/MP/2014
31.12.2015
Date of Order :
18.8.2015
8
TANTRANS 374/MP/2014
30.6.2016
CO
Date of Order :
18.8.2015
31.12.2015
(excepting
for
R&M
works
at
Idduki HEP
for
which
time
extension is
up
to
31.3.2016)
30.11.2016
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
‘Taking note of difficulty
projected by the petitioner,
we allow time to the
petitioner till 31.12.2016 as
a last opportunity for
completion of Phase-I and
Phase-II of protection audit
remarks. If the petitioner
fails to comply with the
order, it shall be liable for
action under Section 142 of
the Electricity Act, 2003 as
already observed in our
order dated 20.2.2014 in
Petition No. 146/MP/2013.’
KPTCL filed a separate
application before CERC on
07.01.2016 seeking time
extension up to 31.05.2017,
and the same is under
consideration by CERC.
KSEB informed that they
would
be
filing
an
application before CERC
within one month for
obtaining
further
time
extension up to 31.12.2017.
(Ref: PCSC-51 held on
25.02.2016)
49
9
NLC
10
NPCIL
146/MP/2013
Date of Order :
20.02.2014
As per the affidavit submitted
to
CERC
regarding
completion of Phase-I &
Phase-II audit works against
374/MP/2014
the CERC Order dated
Date of Order : 20.02.2014 for the Petition
18.8.2015
146/MP/2015,
NLC
has
sought time up to 31-122014 for completion of
Phase-I and up to 31-032015 for
completion of
Phase-II activities.
NLC has been directed to file
a confirmation report before
CERC regarding completion
of protection audit works for
Phase-I and Phase-II in
compliance
with
CERC
Order dated 18.08.2015
against
the
Petition
374/MP/2014.
146/MP/2013
01.05.2014
01.09.2014
Date of Order :
20.02.2014
NLC informed that their
Phase-I works had been
completed
before
31.12.2014.
And
their
pending Phase-II works (2
no.)
had
also
been
completed by the third week
of February, 2016.
(Ref: PCSC-51 held on
25.02.2016)
As per the status furnished
to SRPC, out of the total 9
recommendations
given
covering KAPS and MAPS,
two
no.
of
recommendations
pertaining to MAPS are yet
to be complied with.
9.10.2 It was noted that the time extensions given to various constituents have been completed. Concerned
entities were requested to take action needs to be taken for obtaining further time extension
mentioning the measures taken to implement their respective Protection Audit Recommendations
(PAR).
9.10.3 In accordance with MoP order dated 16.07.2014, M/s Tractable Engineering has been appointed as
the Consultant to conduct the study/ analysis of National Grid. It was noted that Protection audit –
check of 15 stations under Task-I had been completed. After completion of protection audit-check of
the Stations under Task-2, the Consultant would evolve (i) the procedures and systems to carry out
the relay settings, (ii) the procedures / formats for reporting that the relay settings have been carried
out as per the laid procedures. They would also suggest the regulatory framework to ensure that relay
settings had been carried out as per the laid procedures and actions required to be taken in case of
non-adherence to these procedures. The Consultant would also impart training in this regard at each
RPC for the benefit of the Constituents.
10
SCADA & COMMUNICATION ISSUES
10.1
It was noted that SCADA & Communications issues were being discussed in OCC Meeting on
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
50
monthly basis and also in Special Meetings.
10.2
th
In the 117 OCC Meeting, SRLDC had invited attention of the forum that CERC had brought out
Order on Suo-moto Petition 007/SM/2014 dated 29.01.2016 regarding SCADA. Hon’ble CERC had
stated that NLDC and respective RLDC are directed to update the status of telemetry every month at
their website and persistent non availability of data from the generating stations/substations be taken
up in RPC meeting for appropriate direction and action. NLDC is also directed to submit user wise
latest telemetry by 31.08.2016. SRLDC had informed that they have started posting this information
from February 2016 on their website.
10.3
A Special review meeting was conducted on 17.05.2016 at SRPC and the minutes of the Meeting are
at SRPC website.
10.4
In the Meeting the following points were reviewed:
 With respect to Kaiga GS data, it was noted that the data was being routed through Narendra
DCPC and second channel for the same needs to be provided at Narendra DCPC. SR II, PGCIL
informed that fiber connectivity had been established. The issue would be resolved within 15
days.
 PGCIL had informed that redundant channel for Bhadravathi would be arranged within one month
through the splitter arrangement and would be attended on 18.05.2016. OF cable was made
available for this arrangement.
 Regarding Talcher redundant channel, PGCIL had informed that two ports were available at
Talcher, one port is reporting to ER and from the other port SR is receiving data. SR II had
suggested that ICCP can be established. Earlier issue was with respect to ICCP was that of time
delays. SRLDC had pointed that ICCP data was not getting updated during most of the occasions
since the path was through Talcher - ERLDC- NLDC- SRLDC and there would be some time
delays. It was noted that NTPC was to procure RTU to be commissioned at Talcher and PGCIL
would make connectivity to SRLDC. NTPC was requested to expedite the RTU procurement.
NTPC informed that budget approval for RTU procurement was awaited and the approval is
expected within a week. PO would be placed immediately after approval and expected to be
ready by July 2016.
nd
 PGCIL had informed that Ramagundam 2 data channel would be rectified within a week. One
official is available at site to resolve the issue. Data card problem was noticed.
 N’sgar main data is established through FO and standby data channel through PLCC which is
working fine. PLCC would be shifted to FO the issues would be resolved by 18.06.2016.
 It was noted that NTPL second channel had been established.
 SRLDC had pointed out that Kozhikode RTU was intermittently hanging and joint study by PGCIL
and SRLDC was suggested. SRLDC also pointed out that there was no alternate path for
Kozhikode data. SR II had informed that OF cable works had been completed and the terminal
equipment was to be installed. Alternate communication path/channel would be resolved by June
2016. PGCIL had informed that gateway issue to be resolved in touch with M/s ALSTOM.
 NTECL had informed that OF cable termination at NTECL had been carried out, testing was to be
carried out. PGCIL informed that communication would be made through within a week.
 It was suggested that PGCIL SR I and SR II would submit statement of analog discrepancies
noted & transducers to be changed within a week to SRLDC/SRPC.
 SR II had informed that there was some isolator configuration issues would be resolved within 10
days.
 SRLDC had pointed out that 400 kV Kudgi - Narendra line breaker status was not coming to
SRLDC. SR II was requested to take up the issue.
 NTPC, Ramagundam had informed that telemetry works like tap status etc would be completed
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
51
within one week. NTPC also informed that the issue of non updation of MW flow beyond +/- 600
MW on Ramagundam - Chandrapur lines had been already taken-up and would be resolved by
Sept’16. PO had been placed for replacement of transducers.
10.5
AGM, SRLDC informed that the SEM vs SCADA data validation had been carried out for TN and
report had been submitted. It was observed that except Andhra Pradesh the variation between SEM
and SCADA is in permissible limits (2-3 %).
10.6
th
SE (O), SRPC recalled that in the 119 OCC Meeting MS, SRPC had suggested that w.r.t AP the
committee can be revived and validation could be carried out once again.
10.7
SRLDC informed that a committee had met on AP SCADA reconciliation and the minutes of the
meeting will be shared with SRPC.
10.8
DE, APTRANSCO informed that procurement of 20 RTUs was going on and would be installed by
next week.
10.9
AGM, SRLDC emphasized the need for alternate path between Somanahalli and SRLDC and
requested PGCIL to ensure the redundant alternate path considering the recent SCADA blackout for
long duration due to fiber cut between Somanahalli & SRLDC. SRLDC requested SRPC to take up
the requirement with Senior Management of PGCIL and flag the issue to TCC / SRPC. SRLDC vide
letter dated 16.06.2016 (Annexure-10A) has taken up the issue with POWERGRID SR- II in this
regard.
10.10 DGM, SR II informed that some section of OFC network on KPTCL network was stuck-up and once
these sections are completed, redundant channels would be available.
10.11 SRPC requested PGCIL to submit the correspondence with KPTCL and the matter would be taken up
appropriately. SRPC vide letter dated 13.06.2016 (Annexure-10B) had taken up the issue of OPGW
stringing works in Karnataka enclosing SR II, PGCIL letter dated 09.06.2016. It was intimated by
PGCIL that out of 5,600 kMs of OPGW stringing works in SR hardly about 44 kms length is left to be
completed on the below mentioned KPTCL lines:
a. Hoody- LILO point of Hoody-Nelamangala
b. Hoody-HSR
c. Hoody-HAL
d. NRS-Peenya-Hebbal
e. Hassan-Shantigrama.
It is requested to that in the interest of better communication availability for system operation,
necessary instructions may kindly be arranged to be issued by KPTCL for resuming OPGW stringing
works on the KPTCL lines urgently.
10.12 SRLDC expressed concern that they were not able to know whether back up ICCP link is available or
not. M/s ALSTOM needed to show the healthiness of back up ICCP link in the absence of main ICCP.
SR II assured that ICCP link healthiness would be checked in 10-15 days.
10.13 SRLDC informed that for AP, Karnataka and Tamil Nadu renewable data available at SLDCs has
been extended to SRLDC. Constituents were requested to integrate the pending data pertaining to
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
52
renewable at SLDC and extend the same to SRLDC.
10.14 All the constituents were requested to provide a report on monthly basis containing information
regarding non-availability in a prolonged manner /intermittent availability of SCADA points (both
Analog and Digital) to SLDCs which is to be reported to CERC monthly. SRLDC was requested to
prepare a common reporting format and circulate within a week to bring uniformity in reporting. It was
decided that a format with guidelines would be circulated by SRLDC in which SLDCs can give their
feedback. SRLDC agreed for the same.
10.15 SR II PGCIL vide letter dated 02.06.2016 (Annexure-10C) had enclosed the monthly real time data
availability report of POWERGRID, SR-II sub-stations at SRLDC for the month of May 2016, which
was 98.64% and cumulative availability of 2016-17 is 99.12. There was some failure of data between
th
th
4 & 6 May 2016 due to multiple fiber cuts in the intra-city fiber network of Bangalore and most of the
data was made available within very short period except ICCP of AP, TS & TN for which backup links
are yet to be established and integrated with backup SRLDC. SRLDC was requested to kindly
arrange to report of failure of data immediately upon failure so as to restore in least possible time. In
many cases non-availability of data is on account of non-receipt of communication from SRLDC in
time.
10.16 Non functioning of hot line voice communication from SEL to SRLDC
SRLDC vide letter dated 15.06.2016 (Annexure-10D) had communicated to SEL that the hot line
voice communication from SEL to SRLDC was not in working condition since nine months. The same
was taken up frequently with SEL through email and over telephone also. However, it was observed
that the problem was still persisting and yet to be attended. It was noted that hot line voice
communication is a vital part of System Operation requirement and is critical during emergency
situations. It was therefore requested to normalize the hot line voice communication on priority basis
and also ensure its sustained availability at all times to facilitate smooth and secure real time grid
operation as per IEGC 2010.
10.17 Compiled Telemetry status – Utility wise- as directed by Hon’ble Commission
 Hon’ble Commission vide order dated 19.12.2013 on Suo-moto petition No. 56/SM/2013 had
directed all the utilities to provide the required telemetry within six months of this order.
 It was requested that MAPS, KGS & KKNPP may please furnish the compliance status of
pending SCADA inputs the earliest. Details in this regard were available on SRLDC web site.
 KKNPP representative had informed that out of 13 pending points only 2 points are pending
w.r.t GT tap position. Re -tendering is going on and it will take 5 more months to complete the
works.
10.18 In the special meeting held on 19.05.2016 with NPCIL/BHAVINI, the flowing were noted wrt OLTC
telemetry points:

SRLDC had pointed out that other generators in SR (Ramagundam and NLC) were extending
the status points of the off-load tap changers with the use of additional arrangement. MAPS
and KGS were therefore suggested to get in touch with Ramagundam/NLC and explore the
possibility of extending the OLTC points at the earliest.
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
53
11
11.1
 KGS, MAPS and KKNPP would resolve SCADA reporting issues with SRLDC.
PHYSICAL AND CYBER SECURITY/CRISIS MANAGEMENT PLAN/BLACK
PROCEDURE
START
Physical and Cyber Security
Status update on Crisis Management Plan(C&DMP) of Power Sector is to be furnished every
quarter. Information regarding Cyber Security was to be furnished to Chief Engineer, DPD, CEA,
Sewa Bhavan, and New Delhi-110066. Report on Physical Security, other Mock Drills for CMP, Mock
Drill for Black Start Restoration was to be furnished Chief Engineer, DMLF, CEA, Sewa Bhavan, and
New Delhi-110066. A copy of the reports was to be sent to SRPC Secretariat (mssrpc-ka@nic.in and
seoprnsrpc-ka@nic.in). Information required by CEA (vide letter dated 26.11.2013) regarding
Security of power installations was to be furnished to CEA.
11.2
Black Start Procedure
11.2.1 In earlier OCC Meeting, SRPC/SRLDC had expressed concern that black start mock test procedure
is not being followed properly, mock exercise by point to point method is not carried out by all and
schedules are also not
being furnished. It was suggested that both SRLDC and SRPC can
coordinate and monitor regarding this as a special activity. All the concerned entities were requested
st
that BSRP Mock test schedule/completed out during 1 half i.e January 2016 to June 2016 and
schedule for second half be submitted at the earliest.
11.2.2 SRLDC informed that Black Start Workshop and MVAR capability testing at Kakatiya TPS would be
conducted on 14.06.2016.
11.2.3 SRLDC informed that they were planning BSRP mock exercise at Gajuwaka in June 2016 and at
Bhadrawati in July 2016.
11.2.4 Planning of Black Start Mock drill of Nuclear Power Plants
In the special meeting held on 19.05.2016, it was agreed that the Black Start Restoration Procedure
Mock Exercise for Nuclear Power Plants would be co-ordinated on the days of Bus Shutdown /
maintenance program. The station will take care of necessary resources required for such Mock
Exercise and co-ordinate effectively. In this regard, it was agreed to have a plant level meeting with
SRLDC and develop an internal procedure for detailing sequence of operations required at plant
level in a similar manner as done for NTPC, Ramagundam etc.
11.3
Priority for Railways/Metros in the matter of Restoration of Supply
11.3.1 The following were noted earlier:
 KPTCL: to expedite on the actionable points of KPTCL/BMRCL which were finalized in the
Special Meeting.
 KSEBL: SRLDC had requested KSEBL to share the information regarding black start procedure
and other arrangements viz. Hotline etc.
 TANTRANSCO/Southern Railway: The follow up of actionable points finalized in the special
meeting in respect of Chennai Metro may be expedited by like redundancy at 220 KV level and
commissioning of one more substation etc.
 TSTRANSCO: was requested to take proactive action in respect of Hyderabad Metro.
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
54
11.3.2 Kochi Metro –Power Supply Procedure
KSEBL vide letter dated 06.06.2016 (Annexure-11A) had furnished the Operating Procedure for
extending supply of power to Kochi-METRO. Kochi METRO was yet to start full scale trial operation.
11.3.3 Grading of protection in 110 kV Railway traction feeders in KSEBL
11.3.3.1 Chief Electrical Distribution Engineer, Southern Railway vide letter dated 20.04.2016 (Annexure11B ) had requested KSEBL to advise all concerned, that 110 kV Railway feeder protection relays at
KSEB SS be set with required gradation, a minimum setting of 400 A, 1.0 s is required, such that
artificial constraints are not imposed on train operation in the region, causing avoidable
inconvenience to travelling public and safety hazard.
On 12.04.2016 there was a case of 110kV supply failure at Shoranpur Traction Substation at 17:40
hrs on 12.04.2016 and was restarted only at 09:00 hrs on 13.04.2016, after more than 15 hrs of
interruption. During this period, Kanjikode supply had to be extended over the feeding zone of
Shornur Traction Substation to maintain train services. Though the total load on Kanjikode Traction
Substation was much less than the sum total of the Contracted Maximum Demands of Shornur and
Kanjikode traction Substations, the
transformer at Kanjikode Substation tripped on overload
paralyzing the train service in the section, due to the restricted relay settings adopted which could
have been avoided.
Similar constraints are available at Chalakkudi, Ernakulam, Chingavanam,
Punnapra and Kazhakuttam traction substations also.
The present settings adopted in KSEB SSs for Railway feeder are ranging from a minimum of 150 A
to maximum of 600A and time setting varies from 0.15 s to 5.5s. It is pertinent to mention here that
in the neighboring substations of TNEB the settings adopted for Railway feeder is 600A, 3 s.
It was noted that Railway Traction system is designed such that in the event of failure of supply at
one substation, it does not stall the train operation. To accomplish this objective every traction
substation is equipped with 21.6/30.24 MVA (ONAN/ONAF) transformers, which are capable of
safety taking 100% overload for 5 minutes, even for traction substations with lesser Contracted
Demand of 5.0 MVA. Now state of the art numeric type protection relays are provided at Railway
Traction Substations to exploit the short time overload capacity of the traction transformers during
such eventualities.
11.3.3.2 In the meeting, KSEBL was requested to look into the issues raised by Southern Railway.
11.3.3.3 Subsequently, KSEB vide letter dated 15.6.2016 (Annexure-11C ) had communicated the following:

Railways are drawing single phase power through two phases of utility network. This is causing
unbalance in the network. When the 110 kV network and the upstream 220 kV network are
weak, the impact of this unbalance will be significant. Hence the proposal of railways to draw
the entire power of one traction substation from the next station may not be practical. When the
power allocation is issued these aspects are also considered. Unbalanced loading by railways
have profound impact on the loading capability of the transmission line and the 220 kV
transformers. The relay settings are provided in consideration of all techno-commercial issues.

Railways had taken up the matter with KSEBL separately and are under consideration of the
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
55
Transmission and System operation wing.
11.3.4 Emergency Preparedness for restoration of Remotely Controlled Sub Stations
11.3.4.1 The following were noted in earlier meetings:
 PGCIL had informed that factually there was no unmanned substation under SR I and SR II
PGCIL. Sufficient man power has been made available at all substations.
 SRPC had suggested that a mock test can be carried out at one randomly selected substation,
each of SR I and SR II.
 SRLDC had suggested that the exercise can be carried out during night period and requested
that coordinators information should be furnished in advance. It was suggested that RTAMC
being a coordinating agency for PGCIL substations can be called during the mock exercises at
any time.
12
RGMO
12.1
RGMO response had been deliberated in various Special/OCC/TCC/SRPC meetings. Inadequate
response was an area of serious concern and there was no noticeable improvement.
12.2
MS, SRPC stated that the recommendations finalized in the special RGMO/MVAR interchange
meeting should be complied by all the utilities.
12.3
In earlier OCC Meetings, the following had been noted:





12.4
In case RGMO is taken out of service for any reason, generating station must intimate
SRLDC with the reasons.
SRLDC/SRPC had pointed out that all SLDCs were to ensure that all the new units have
RGMO, communication links, Main & Standby data channel and SCADA facility in place
before declaration of COD.
SRLDC had expressed concern regarding the RGMO response of the generators in the
region which was in the range of only about 20-40 % of the expected relief of the capacity on
bars.
SLDCs were requested to analyze the RGMO instances posted by SRLDC for the generators
in their control area and take up action as per 84/MP/2015. Inadequate Response to be
taken up with SERC (Petition No.302/MP/2013). Action on recommendations finalized in the
Special Meetings needed to be taken by generators/states. All generators were kindly
requested to take all steps to ensure intended RGMO/FGMO response.
As per the order in RGMO Petition No. 302/MP/2013, the units (including state embedded)
shall not be scheduled beyond their ex-bus generation corresponding to 100% of their
installed capacity.
RGMO implementation/ Extension of RGMO status point to SLDC
The following had been noted in earlier meetings wrt status point extension:




APTRANSCO: Upper Sileru (Cable problems) & Machkund (RTU problem) stations.
TSTRANSCO: Status of Hydro units.
TANTRANSCO: MTPS- I & II and Hydro stations.
KPCL: All the status point (except Raichur Unit IV) had been extended to SLDC and these points
can be extended to SRLDC also. Status points of all hydro units like Almathy, Kadra &
Gerusoppa HEPs to SLDC had been made available but yet to be configured to SLDC.
Regarding NPH Unit 6 in order to extend the status signal of RGMO (On/Off condition) to RTU
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
56
panel of SLDC, Ethernet-RJ45 communication port is available. KPTCL SLDC was requested by
KPCL that the concerned may kindly be informed to connect the same to KPTCL/RTU panel for
extending the information to SLDC/KPTCL.
12.5
The following was noted in the Meeting:
 AP confirmed that RGMO had been implemented in Hinduja Unit-I as per the settings
envisaged in IEGC. However status points were to be mapped to SLDC. AP, SLDC was
requested to extend the RGMO status to SRLDC, SCADA.
 AP confirmed that Krishnapatanam RGMO Status has been mapped at SLDC on
28.05.16.
 UPCL informed that the RGMO status was extended to SLDC, KPTCL. SLDC was
requested to confirm the same to SRLDC.
 SRLDC vide letters 02.05.2016 addressed to TPCIL & CEPL had raised the issues
pertaining to the RGMO performance and requested to review the RGMO logic and
implement the same in line with IEGC.
 TPCIL vide e-mail had informed that the logic review was taken up with the OEM and
will revert back as early as possible.
 CEPL vide E-mail dated (Annexure-12A) has furnished the following:
 2.5% load variation (+15MW to -15MW) was implemented in RGMO logic circuit to
maintain the stability in CCS till 09-05-2016.
 From 09-05-2016 onwards, 5 % load variation (+30 MW to -30 MW) is implemented
as per IEGC regulations.
 CEPL was requested to take-up with OEM as the logic details furnished by them were
not clear (not as per IEGC requirement) and the performance analysis shows that the
performance is not meeting the IEGC requirement.
12.5.1 SRLDC presented the RGMO performance for the incident on 18.05.2016 when frequency rose from
50.00 Hz to 50.45 Hz at 17:31 hrs due to load crash of 3700 MW in NR. (The presentation of
RGMO/FGMO response is at Annexure-12B). The highlights are as follows:
Thermal Units response
Andhra Pradesh:





Rayalseema Unit - 2 given partial response other units responded.
Vijaywada TPS Unit -2 & 4 response is poor. Other units’ response was good & overall VTPS
response is 30 MW in the first minute.
nd
SDSTPS Unit-1 response was good around 27 MW, but not sustained till 2 minute.
SDSTPS Unit -2 out.
VTPS Unit-7 only 4 MW reduction-Less response
Telangana:



KTPS Unit – 9 &10 partial response (above 60%)
KTPS Unit -11 response was good (140%) – 25MW
KTPP Unit -1& 2 good response (>100%) - >20 MW
Karnataka:

Raichur , BTPS , UPCL & JSWEL SCDA data problem & analysis not submitted by SLDC
Tamil Nadu:

Mettur TPS except Unit-1 showed reverse response & other units responded good.
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
57
 NCTPS Unit-3 showed good response whereas Unit 1 & 2 response was poor.
 TTPS all units response observed to be poor.
 Mettur Stage III Unit-1 SCADA problem, Analysis not submitted by SLDC
 NCTPS Stage II Unit -1& 2 responses was good around 23MW.
CGS:







NLC Stage II: all units partially responded.
NLC-I Exp units responded partially.
NLC- II Exp units were under shutdown
Ramagundam Units - 6 & 7 good response Unit-5 partial response & Unit 4 very less response.
Simhadri all units given very good response(Total 76 MW change)
Vallur Unit 1 & 2 Responded, U#3 Out.-U#2 response non sustainable.
Talcher Stage II Unit – 3 & 6 -No response, Unit-4 – 60% response. Unit 5-28% response
IPPs:
Coastal Energen Unit – 1 & 2 non-sustainable response as shown in the graphs.
ILFS Unit-1 partial (57%) response.
TPCIL Unit -1 just 3 MW change & Unit 2 no response (may be non-sustainable response)Data not submitted
 HNPCL Unit-1 was under shutdown
SRLDC suggested that RGMO/FGMO status & response for state generators should be monitored by



12.6
State LDC. In case of non-response/disabling/taking out of the feature, the respective generators may
kindly be advised by SLDCs to take appropriate action in this regard.
13
TRANSMISSION NETWORK ISSUES AND SYSTEM OPERATION ISSUES
13.1
High loading on 400 kV Nellore PS- Nellore DC line/ Separate control area for Nellore PS
complex
13.1.1 In the earlier Meetings, SRLDC informed that the issue of separate control area was being reviewed
by NLDC. No further communication from CTU was received.
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13.1.2 The issue had been deliberated in the 28 TCC/29 SRPC Meeting held on 4 and 5 March 2016.
NLDC had observed that a number of operational issues could be resolved by declaring separate bid
area and it was an easily implementable solution.
With separate bid area, NLDC/SRLDC could
optimize the evacuation with the available network. They would inform Hon’ble CERC regarding
formation of separate bid area. Power Exchange would also be apprised accordingly. CTU was
suggested to examine other options like reconfiguration of some lines, shifting of one or two lines etc.
for enabling higher evacuation from the complex. It was noted that NCC Unit I was scheduled to be
commissioned by May 2016 and hence process of formation of separate bid area needed to be
completed at the earliest.
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13.1.3 In the 118 OCC Meeting, SRLDC had informed that NLDC had called a Meeting with the Power
Exchanges in this regard. SRLDC had suggested that they would carry out mock computations to
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identify the export limits from the complex. In the 119 OCC Meeting, SRLDC informed that there is
no further updated in this regard.
13.1.4 In the Meeting, on a query from SGPL, Nellore, SRLDC clarified that the limitation / constraint of
Nellore-NPS Complex will be taken into account and necessary curtailment as per on bar capacity of
generating units / availability of lines will be made in line with the existing regulations. In the present
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
58
network condition / ATS availability, the maximum limit of the Nellore complex at normal network
condition wouldl be around 2100MW.
13.2
Overloading of the Transmission lines
It was noted that line loading on 400 kV Gooty – Nelamangala D/C lines were going very high failing
to satisfy N-1 criteria. KAR SLDC was requested to take appropriate corrective action. The following
actions were suggested:


13.3
Increasing dispatch at downstream generating stations(UPCL, Varahi and Sharavathi
complex)
Load Management in Bangalore and Mysore area.
Loadability of ICTs and associated protection settings to prevent cascaded tripping of ICTs
13.1.1 Insufficient action in controlling the loading of ICTs leads to N-1 criteria violation in compliance of
Regulation 3.1 f(8) of CEA(Grid Standards) Regulations 2010 and Regulation 3.5 a(i) of CERC Indian
Electricity Grid Code Regulations 2010.
13.1.2 In the Meeting, it was noted that there N-1 violation of Arasur, Vemagiri, Somanahalli, Madurai,
Mysore and Ramagundam ICTs.
13.1.3 SR II, PGCIL vide E-Mail dated 07.06.2016 (Annexure-13A) had informed that he SPS scheme for
averting Over load tripping of ICTs at Arasur has been completed on 06.06.16 as per the logic
deliberated in the PCC meeting. SPS had been implemented in ICT - 01 on 30.05.2016 & in ICT - 02
on 06.06.2016 as per the recommended settings and logics. The scheme and logics had been tested
successfully. A link has been provided to keep the protection in and out of service. Now the SPS is
kept in service for ICT - 01 and ICT - 02 at Arasur SS.
13.1.4 Subsequently TANTRANSCO vide letter dated 17.06.2016(Annexure-13B) had furnished the SPS
scheme and logics implemented for Arasur ICTs.
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13.1.5 It was noted that even with the commissioning of 3 ICT at Arasur, 220 kV N/w would get overloaded
and TANTRANSCO was requested to do proper load management whenever ICTs were overloaded.
13.1.6 DE, APTRANSCO informed that Gajuwaka ICT was getting loading upto 280-290 MVA and Kalpakka
loading was around 220 MVA. AP SLDC was suggested to shift some of the loads to Kalpakka S
from Gajuwaka SS.
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13.1.7 EE, KPTCL informed that Hoody ICT-2 (R Ph) had failed on 28 May 2016 and they were planning to
shift a ICT from Nelamangala/Somanahally. He informed that they were controlling the ICT over
loadings by doing load management.
13.1.8 SRLDC requested all the constituents that whenever real time messages were issued to control over
ICT loadings, constituents should be committed to take necessary steps/load shedding to curtail the
overloading. SRLDC requested for urgent action to alleviate the loading of 400/220 kV ICTs. A long
term solution of augmentation/load reconfiguration needed to be considered / implemented in view of
grid security.
Action Plan of constituents to restrict the loading to permissible limit may kindly be
furnished to SRLDC and immediate action needs to be initiated.
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
59
13.2
Prolonged Outages
13.2.1 Status review of prolonged outage of grid elements in SR & Realistic Action plan for revival of the
prolonged outage was awaited from some of the constituents. Monthly reports are required to be
submitted to CERC.
13.2.2 The following is noted in the Meeting:
 RSTPS ICT- II is expected within one month
 N’sagar – Cuddaupah FSC expected by 19.06.16
 NLC II Exp U -2 expected by 14.06.16
 Chittor ICT1 : Board approval is pending
13.2.3 TPCIL vide letter dated 21.06.2016 (Annexure-13C) had communicated that TPCIL Unit-II had come
into service on 18.05.2016.
13.2.4 All constituents were requested to convey the schedule of revival for the elements under prolonged
outage to Hon’ble CERC in this regard. (CERC Order on petition no 146/MP/2013).
13.3
Closing of 220 kV Upper Sileru- Balimela line
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Upper Sileru - Balimela line had been idle charged from 8 January 2015 from Upper Sileru end.
13.4
Status of Kudgi ICT
13.4.1 NTPC informed that ICT at Kudgi SS, NTPC would be commissioned by July 2016.
13.5
Upcoming Generating Stations
13.5.1 Central Sector
Station
Unit
IC in MW
Schedule
NTPC
Kudgi TPS Stage-I
I,I, III
3x800=
2400
Unit-I :Syn. by Jul’16 & CoD by
Mar’2017
Unit-II : Syn. by Mar’17 & CoD by
Sep’17
Unit-III : Syn. by Jun’17 & CoD by
Dec’17
NPCIL
KKNPP Stage-I
II
1000
Unit-II: Synchronization by July’16 . FL
by October 2016
BHAVINI
Kalpakkam (PFBR)
I
500
Synchronization by March-2017
Remarks
13.5.2 State Sector/IPPs
Station
Location Owner
IC in MW SCH/Remarks
Rayalaseema
TPS ST-IV
Meenakshi PH-II
AP
State
600
COD by Dec 2016
AP
IPP
700
IPP
1320
2016-17
Untied : 640 MW
2015-16
AP : 300 MW
Unit-III : 2016-17
East Coast
AP
Energy
Thermal
Powertech
AP
IPP
AP
Unit-III
1320
IPP
660
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
60
SGPL,
Krishnapattnam
AP
LANCO
AP
Kondappalli(Stage I&
II)
GMR
Rajahmundry
AP
IPP
Energy Limited
Stage II (GREL)
Hinduja NPCL,
AP
Vizag
Bellary TPS U-3
KAR
IPP
1320
MPP
2x317
2x384
IPP
Unit I: COD by 2016-17
Unit II: Synchronization 2016-17
AP: 500 MW (Firmed up PPA to be signed)
Unit 3A: Achieved full load on 07.08.2015
Unit 3B: Achieved full load on 05.09.2015
U1: Achieved Full Load on 12.09.2015
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COD of Unit 1: 11.01.2016.
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Unit II : 1 Synchronized on 31.03.2016
State
700
Achieved full load on 01.03.2016. COD by
June 2016
Yeramarus TPS
KAR
State
1600
Unit-I: FL achieved on 29.03.2016. Unit II:
COD by June 2016.
IL & FS Unit-II
TN
IPP
600
First Synchronized on 13.04.2016. COD
from 30.04.2016
Kakatiya TPP
TS
State
600
COD on 24.03.2016. Confirmation was yet
St-II
to be received from Commercial wing.
Singareni
TS
IPP
1200
Unit I: CoD by June 2016.
Unit II: CoD by August 2016.
13.5.3 SRLDC pointed out those new ISTS connected units should come out with detailed metering scheme
for various units commissioning schedule at least one year prior to synchronization. The scheme
needed to be discussed and finalized in the Meeting of Commercial Sub Committee.
13.6
Non operation of Auto reclosure
13.6.1 A/R feature for 220 kV inter regional lines Chikkodi-Mudshingi/Talangde & Ambewadi-Ponda
lines.
13.6.1.1 In the meeting, KPTCL informed that A/R feature for Chikkodi- Mudshingi/Talangde lines would be
enabled in the next week. For Ambewadi – Ponda line, A/R can be enabled after R&M works.
13.6.1.2 In the special meeting with KPTCL held on 17.06.2016 the following was noted:




A/R feature for Chikkodi –Talagande line had been commissioned. A/R on Chikkodi Mudshingi would be commissioned within two to three days.
Regarding Ambewadi - Ponda, R&M works were going on for this line and A/R would be
covered in R&M works. In the Meeting, KPTCL informed that there were some contractor
issues and the works were being assigned to M/s Alstom and it may take some time.
Regarding Kaiga - Guttur, KPTCL was ready to enable the A/R at Guttur end and once Kaiga
agrees, they would enable the A/R.
Regarding lines from Nagjhari, KPTCL would enable the A/R once KPCL is ready. KPCL had
earlier informed that they would be ready by July 2016.
13.6.2 400 kV KKNPP – Madurai line
The following was noted in the Special Meeting held on 19.05.2016:
 The concern of KKNPP on shunt reactor /PIR would be taken up with PGCIL. Subsequently,
the A/R implementation would be reviewed.
 The status update on KKNPP-Tuticorin PS D/C lines would be sought from PGCIL.
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
61
13.6.3 All 230kV lines emanating from MAPS
In the Special Meeting held on 19.05.2016, MAPS agreed to implement the A/R scheme by June
2016.
13.6.4 All 230kV lines emanating from BHAVINI
In the Special Meeting held on 19.05.2016, the following were noted:

BHAVINI had informed that the generation had commenced and A/R would be implemented
after commissioning of the unit.

It was pointed noted that BHAVINI-Siruseri and BHAVINI-Arni lines were being utilized.
NPCIL had stated that BHAVINI could consider A/R scheme now and the apprehension of
unit tripping could be avoided and other teething issues could also be addressed.

BHAVINI had agreed to consider and implement the A/R scheme (could be time differentiated
A/R). Necessary approval would be taken from their engineering/corporate.

BHAVINI was suggested to implement the A/R scheme by June 2016.
14
LGBR & OUTAGE PLANNING
14.1
Status Review on development of load forecasting tools by SLDCs as per IEGC Clause 5.4.2
14.1.1 The issue was noted for compliance by the states/SLDCs.
14.1.2 The following was noted from the Order dated 19.12.2013 on Petition No. 249/250/251/MP/2012
“We direct all STUs/SLDCs of the Northern Region, Southern Region and Eastern Region to
forecast their demand and make adequate arrangements to avoid dependence on Unscheduled
Interchange for meeting their demand or for injecting short term surplus power, irrespective of the
frequency”
14.1.3 There was need for further involvement of DISCOMs for their 96 block load forecast and by state
generators of their 96 block generation forecast. SLDCs needed to play more proactive role in this
regard.
14.2
Outage deviation report for the period April 2015-March 2016 in respect of Generating
Units/Transmission Elements of Southern Region
Outage deviation report for the period April 2015-March 2016 in respect of Generating
Units/Transmission Elements of Southern Region had been communicated to Hon’ble CERC.
15
OTHER ISSUES
15.1
Collection of data regarding Power Supply to Rural Areas
15.1.1 CEA vide letter dated 09.04.2014 had informed that in the Meeting held at MoP on 09.04.2014 it had
been decided to collect the data invariably from DISCOMs in a simplified format. SRPC vide letter
dated 11.04.2014 enclosing CEA letter dated 09.04.2014 had requested that the data in this regard in
the requisite format may please be arranged to be communicated to SRPC Secretariat at the following
E-mail addresses mssrpc-ka@nic.in & seoprnsrpc-ka@nic.in
15.1.2 SRPC requested all concerned to kindly ensure that data in respect of previous month is
communicated by first week of the month.
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
62
15.2
Reporting the Status of implementation of the recommendations of the Enquiry Committee
15.2.1 All RPCs had been requested to update and forward the status of implementation of
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recommendations of the Enquiry Committee on Grid Disturbances on 30 and 31 July 2012 to CEA
in the prescribed format on fortnightly basis regularly i.e. the status as on last day of the month to be
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forwarded by the 3 day of the following month and that as on 15 of the month to be forwarded by
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17 of the month.
15.2.2 SRPC requested all the constituents to kindly update and forward the status in a timely manner.
15.3
Energy Generation data Management from Renewable Energy Sources:
SRPC stated that Monthly generation data in respect of Renewable Energy Sources was to be
submitted to CEA with a copy to SRPC.
15.4 Data/ Information requirements of SRLDC
15.4.1 SRLDC requested timely reporting of the following

Loss of generation due to coal shortage / technical problems needs to be furnished for
onward transmission to NLDC by 1000 hrs on a daily basis.

Providing split-up of details of Non-Conventional Energy Sources generation for Solar,
Biomass, Wind, Bio-gases & Small Hydels in monthly data.

Load Forecasting Day wise Block wise

Power Supply Position Report: Hourly Load Shedding & Daily L.S in MU to be submitted
before 03:00 hrs for previous day for calculating correct shortage.
• All constituents were requested to submit the details of new (or LILO if any) 220kV lines
commissioned during 2015 in their control area by next OCC meeting.
15.4.2 As discussed in previous OCC Meetings, SRLDC requested all constituents to furnish hourly load
shedding details (both scheduled & unscheduled) by next day as the same is required by various
agencies. AP & KAR were not submitting the details. Other constituents are submitting data
occasionally.
11.4 Wind Generation
SRLDC presented the day-wise Wind Generation pattern in Karnataka & Tamil Nadu during the
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period 1 May 2016 to 31 May 2016. Wind generation in Karnataka had varied between 25.637 MU
(21.05.2016) to 3.634 MU (16.05.2016). Wind generation in Tamil Nadu had varied between 76.652
MU (23.05.2016) to 2.525 MU (08.05.2016).
11.5
Coal Stock Position
As per CEA norms, coal stock position is termed as critical (< 7 days) or super critical (< 4 days) of
coal stock.
It was noted that all the thermal stations in Southern Region have more than 7 days
stock as on 10.06.2016.
Generators were requested to take steps to maintain the coal stock position.
16
Commercial Issues raised by SRLDC
Copy of presentation of Commercial Issues raised by SRLDC is at Annexure-16A.
17
VOTE OF THANKS
MS, SRPC thanked the participants for their active participation in the Meeting.
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
63
18
DATE & VENUE OF THE NEXT MEETING
The schedule for the next OCC Meeting is as follows:
st
Meeting :
:
121
OCC of SRPC
Date
:
12.07.2016 (Tuesday)
Time
:
10:00 Hours
Venue
:
SRPC, Bangalore.
Minutes of the 120th OCC Meeting of SRPC held on 10th June 2016
64