c(nl
l\^
Protection Audit of NTPC/Kaniha
|
!
Name/Details: A) 22Ol<11Meramandali 1 & 2
B)
c)
22Ol<11Rengali
zzoKVTTPS
Description
Sl. No
L
2
3.
4.
Main I-Distance Protection
Main II-Distance Protection
Status
Remarks
Yes
LZ96 (ABB) for Rengali & TTPS
Circuit & RAZFE (ABB) for
Yes
Directional Inverse Definite Minimum
Time 0DMT) type earth fault relay
Directional IDMT over current and earth
fault back up protection
YES
No
Meramandali Circuit - I &2
MCOM P444 (AREVA) for all the
Circuit
The same is enable in the MICOm
P444 Distance Relay
Stand Alone IDMT E/F & O/C Relay
Not Available.
5.
Two stage over voltage protection
NO
6.
Auto Reclosing
NO
Not envisaged during the Engineering
NO
Not envisaged during the Engineering
NO
Speech & Data Communication
facility Available but Protection not
available (not envisaged during
7
Carrier
aided
inter-trippi ng/blocking
feature
Are Power Line Carrier Communication
(PLCC) equipment with Protection
B
9.
Coupler complete for
speech
transmission, line protection and data
channels provided?
Are L00o/o back up Communication
Channels provided for transmission line &
line compensating equipment?
Engineering).
NO
Stand Alone DR
1.0
LI
Disturbance Recorder
Yes
Distance to Fault Locator
Yes
Make - Hathaway
Type - IDMT1
Stand Alone Fault Locator is not
available, But the feature of fault
locator is available in the MICOM
P444 Relay.
Event Logger:
12.
i) Stand Alone
iD Part of
S/S
or switchyard
automation system
Are Time Synchronizing Equipment (TSE)
complete
t3
Yes
with
antenna,
all
S/S
Stage-l (HATHAWAY-SER7000) for
400 kV Bays 1 to 17 is used for the
220 kV system Events.
cables,
processing equipments etc. provided to
receive synchronizing pulse through
Global Positioning System (GPS)
YES
Stand Alone DRs
&
ELs are time
synchronized
compatible for synchronization of event
logger, disturbance recorder
SCADA/automation system
1.4.
and
?
Are all protection employed Numerical
Wpe?
')/ q w lr[V. Kalyanramen)
Executive Engineer, ERPC
fu1,,1,,'
[P. S. Das)
Chiefmanager, ERLDC
No
Only Main
- II Numerical for all
kff.tr.*)r,rr Ury--
(RKPadhi)
(S.KSuar)
Deputy lllanager, PGCIL AGM(EMD), NTPC/IGniha
Protection Audit ofNTPC/Kaniha
|
CHECK LIST FOR TRANSMISSION LINE
Name/Details: A) 220KV Meramandali 1 & 2
B) 220KV Rengali
c) 220KV TTPS
Are two protection channels in addition
15.
to one speech plus data channel provided
for each direction?
NO
76.
Local Breaker Backup Protection (LBB)
Yes
17.
Any other Protection
RAICA (ABB) for all the lines
** Check the availability & functional healthiness.
Note:
a) Sl No.2 is optional at voltage level 220KV & not required at voltage level 132KV;
bJ
Sl No.3 is required, atZZO KV
ifboth Main-l & Main-ll are distance protectiont otherwise
not required. At 132 KV level it is not required;
c)
d)
Sl No.4 is required
at220 I(V level if Main-ll is not pr(rvided, otherwise not.
Sl No.14 is required at 220KV and above;
U%)
l.1,
lw
[V. Kalyanramen)
Executive Engineer, ERPC
/"1
%i1,-,4t,-(P. S. Das)
Chief manager, ERLDC
{'H-r11,-
$)^\-
(R K Padhi)
(S. K. Suar)
Deputv Manager, PGCIL
AGMIEMD), NTPC/IGniha
2
Protection Audit of NTPC/Kaniha | 3
CHECK LIST FOR SUB-STATION/SWITCHYARp
Name/Details: NTPC/Kaniha
Remarks
Status**
Protection Scheme
SI. No
7.
Bus bar Protection
Yes
RADSS (ABB)
2.
Event Logger (EL)
Yes
Stage-l (HATHAWAY-SER7000) for
400 kV Bays 1 to 17 is used for the
220 kV system Events.
Provided
3.
Synchronizing Facility
Yes
4.
Are Synchro Check Relay provided with
requisite settings?
No
in
synchronizing Trolley
Alsthom-SKD11 for manual closing of
all 400 &220 kV Breakers
RASC(ABB) Provided for all lines
(Auto reclosure facility not envisaged
during Engineering)
DC supply:
5.
i)
ii)
220v
Yes
Yes
4BV
6.
DG set
No
7
Auxiliary Supply
Yes
B.
Special Protection Scheme (SPS)
No
Under Frequency Relay(UFR)
9.
10.
L7.
12.
D
ii)
iii)
220V- 02 SETS (40OAH each),
4BV-02 SETS [50OAH each)
DG Supply is available for the Unit
Emersency Bus [ 415V)
From 11KV Unit Bus of Unit
- 7 &2
:
Stage I
No
Stage II
Stage III
Has the Fault level Increased since
connected to grid?
If status at SI. no 10 is "Yes", then whether
Sectionalization of the bus/ Series
Reactor on the line or bus provided to
Iimit the fault level?
Has the size and number of ICT in the S/S
been planned in a way that the outage of
any single unit does not overload the
remaining ICTs
or the
Not Applicable
Yes
underlying
transmission system
SCADA:
13.
i)
Yes
Yes
Voice
ii) Data
1,4.
15.
76.
t7.
Yes
Switching Schemes
Are Circuit Breakers suitable for singlephase and three-phase auto reclosing?
Are Circuit Breakers provided with two
trip coils?
Are Circuit Breakers provided with Pre
Insertion Resistors?
\'tw.
Executive Engineer, ERPC
Two Main & One Transfer Bus
Yes
Yes
No
fuqrr4-r-- -&'*f-lr>)tz-
(P.S.Das)
Chief manager,
(RKPadhi)
$P"t
(S.KSuar)
ERLDC Deputy Manager, PGCIL AGM(EMD), NTPC/Ihniha
Protection Audit of NTPC/Kaniha | 4
CHECK LIST FOR SUB-STATION/SWITCHYARD
Name/Details: NTPC/Kaniha
Protection Scheme
Status**
Are Earth Switches provided at
appropriate locations to facilitate
Yes
Sl. No
18.
earthing of outgoing transmission lines to
Remarks
enable maintenance?
L9,
20
Are all main protection relays of
numerical type?
Are protection functions subdivided into
two independent groups & capable of
providing uninterrupted protection even
in the event of one protection groups
No
Main
-
II Numerical for all
Yes
failing?
2t.
22.
23.
Are two sets of DC sources available?
If status to Sl. no ?1 is Yes, then whether
relays are electrically and physically
segregated into two groups to obtain
redundancy and to take Protection
systems out for maintenance while the
equipment remains in service?
If status to Sl. No 21 is "No", then whether
relays are electrically and physically
segregated into two groups by giving DC
Yes
Yes
N.A.
rate fuses?
24.
Bus Bar Protection
Yes
25
Bus Bar Protection scheme has provision
for future expansion
Yes
26.
Any other Protection
** Check the availability & functional healthiness'
Note:
uirements for SI No.14 are:
Voltage level
Switching Scheme
66KV & L3zto'l
Main & Transfer Bus or Double bus
Double Main & Transfer Bus or Double bus
220tc.t
Breaker & a half or Double Main and Transfer bus
40OKV
It
w.
l/
)
Executive Engineer, ERPC
%r,*
(P. S. Das)
Chief manager, ERLDC
{*l.ptollr-llL
S\-
(S. K Suar)
K. Padhi)
Deputy Manager, PGCIT AGM(EMD), NTPC/IGniha
(R
Protection Audit of NTPC/Kaniha
I
CHECK IIST FOR TRANSMISSION LINE
A) 400IW Rourkela 1&2(Line Length (171KM)
B) 40010 Rengali - L &2 (25lff)
Name/Details:
C) 4O0KVMeramundali
- 1& 2 (45KM)
Description
Sl. No
1.
Main I-Distance Protection
Yes
2.
Main II-Distance Protection
Yes
3.
4.
Remarks
Status**
Directional Inverse Definite Minimum Time
0DMT) Wpe earth fault relay
Directional IDMT over current and earth
fault back up protection
MtcoMP444
LZ96 - A &B
7SA52
-
C
No
No
RXEG21 (ABB) for A & B
7RW6000 (SIEMENS) for
C
Stase-l
5,
6.
7
Two stage over voltage Protection
Yes
Auto Reclosing
Carrier aided inter-tripping/blocking
feature
Are Power Line Carrier Communication
8.
9
with Protection Coupler
speech transmission, line
(PLCC) equipment
complete
for
Yes
?
and data channels
Are 700o/o back up Communication
Channels provided for transmission line &
Yes
Linel -110%, 4sec (ALARM)
Line? -tl2o/0, Ssec (ALARMJ
Linel -110%, Ssec (TRIP)
Line? -172o/o, Ssec (TRIP)
Stage-ll
Linel - 140 o/o, 0.1 sec (TRIP)
Line2 - t40 o/0, 0.1 Sec (TRIP)
RAAM (ABB) forA & B
7VK572 (SIEMENS) for C
(Dead Time- 1sec, Reclaim Time
25Sec)
PUTT Z2 - A,B
PUTT (21 ExtJ -
C
[21 ext-Line Length + 20o/o)
Yes
Yes
Yes
Yes
line
Stand Alone DR
10.
Yes
Disturbance Recorder
Make - HATHAWAY
Type - IDM T1
Stand Alone Fault Locator (RANZA)
Lt.
Distance to Fault Locator
Yes
availableinA&B
In built Fault Locator function is
available in C in numerical Relay
(75A52 for
Event Logger:
12.
i)
iD
Stand Alone
Part of S/S or switchyard automation
system
$,,1,..
(V. Kalyanramen)
Executive Engineer, ERPC
-
C
& MICOM P444 for allJ
Stand Alone
Yes
S/S
Separate for Stage
-l
& II
Stage-l (HATHAWAY-SER7000) for
Bays L to 17 & Stage-ll (SIEMENS SIESER) for Bays 18 to 41
4,,*
(P. S. Das)
Chief manager, ERLDC
{r*yar lHt-(R K. Padhi)
$,*t
(S. K. Suar)
Deputy Manager, PGCIT AGM(EMD), NTPC/Kaniha
Protection Audit of NTPC/Kaniha
E
CHECK LIST FOR TRANSMISSION LINE
A) 40010 Rourkela 1&2(Line Length (171KM)
B) 400Kv Rengali - 1 &2 (25KM)
C) 400KV Meramundali - 1 & ? (45KM)
Name/Details:
Remarks
Status**
Description
Sl. No
Are Time Synchronizing Equipment (TSE)
complete
13.
with
antenna,
all
cables,
processing equipments etc. provided to
receive synchronizing pulse through Global
Positioning System (GPS) compatible for
synchronization
disturbance
of event
reccrder
SCADA/automation system
Yes
Stand Alone DRs
&
ELs are time
synchronized
logger,
and
?
- 1 Distance Protection
for all the 400 kV lines and Main - II
Distance Protections of 400 kV
Meramandali Circuits are of
Numerical type.
Only the Main
t4.
Are all protection employed Nutt.,.erical
type?
No
15.
Are two protection channels in addition to
one speech plus data channel provided for
each direction?
16
Local Breaker Backup Protection (LBB)
Yes
77
Any other Protection
N.A.
Yes
RAICA (ABBJ for Rourkela & Rengali
Circuit, whereas 7SV600 (SIEMENS)
for Meramandali Circuit.
** Check the availability & functional healthiness.
Note:
a)
b)
Sl No.2 is optional at voltage level 220KV & not required at voltage level L32KV;
Sl No.3 is required
at220 KV if both Main-l & Main-ll are distance protections, otherwise not
required. AtL32 KV level it is not required;
c)
d)
Sl No.4 is required
Sl No.14 is
at220 KV level if Main-ll is not provided, otherwise not.
required at220W and above;
Q)q,'
[V. K.alyanramen]
Executive Engineer, ERPC
@,^'*
d-^6 \)rfltr_
(P. S. Das)
Chiefmanager, ERLDC
U'eputy Manager, PGCIL
(R K Padhi)
$l't
(S. K. Suar)
AGM(EMD), NTPC/Kaniha
Protection@B
CHECK LIST FOR TRANSFORMER
Name/Details:400/220l33KV. 315MVA ICT 1 & 2. TSTPP
1.
Yes
Differential Protection
Yes
Over Fluxing
2
Remarks
Status*r
Protection Scheme
Sl. No
RADSB (ABB)
RATUB [ABB)
110o/o,3.5 Sec (Alarm)
Inverse Definite Minimum Time
flDMT) Trip
Yes
Restricted Earth Fault
3
Directional Over Current
Backup directional over current and earth
4.
fault protection (HV & LV side)
or
impedance protection
Yes
5.
Buchholz
Yes
6.
Winding Temperature Indicator (WTII
Yes
7
Oil Temperature Indicator (OTI)
Yes
B
9.
Magnetic Oil Gauge (M0G) with low oil
level alarm
Oil Surge Relay (OSR) for On Load Tap
RADHD (ABB)
(CDD,
ALSTOM) is available on both HV &
LV side of ICT.
Yes
Yes
10.
Pressure Relieve Device (PRD)
Yes
Ll.
Surge Arrester (SA) on both primary and
secondary sides of transformers located
outdoors and connected to over head lines
Yes
t2.
Tertiary winding Protection
Yes
13.
Over load alarm
Yes
74.
Cooling
15
Any other protection
0NAN/
ONAFT
OFAF
** Check the availability & functional healthiness.
Note:
a) sl No.6 is required at voltage level 220KV for 100MVA & above rating;
b) OTI is required for 1 MVA and above;
ln-n
,Alrchw
[V. Kalyanramen)
Executive Engineer, ERPC
W,,*
(P. S. Das)
Chiefmanager, ERLDC
<**b>\)tottt_
(R K Padhi)
ql'^t
(S. K. Suar)
Deputy Manager, PGCIL AGM(EMD), NTPC/Kaniha
Protection Audit of NTPC/Kaniha
I
CHECK LIST FOR REACTOR
Name/Details: SOMVAR L/R-ROURKELA 1& 2
Protection Scheme
Sl. No
Status **
Remarks
1.
Differential Protection
Yes
RADHA
2.
Restricted Earth Fault [REF)
Yes
RADHD
3.
Reactor backup protection (impedance
type or definite time over current (O/C)
and earth fault (E/F) Proteq&4)
Yes
RAKZB
Back up Impedance type,
4.
Buchholz
Yes
5
Winding Temperature Indicator IWTI)
Yes
6.
Magnetic Oil Gauge (MOG)
Yes
7
Oil Temperature Indicator (OTI)
Yes
8.
Surge Arrestor (SA)
Yes
9.
Cooling
Yes
ONAN
10.
Any other Protection
N.A.
Not Applicable
** Check the availability & functional healthiness'
Wy.)\[V. Kalyanramen)
Executive Engineer, ERPC
M
zqilvltl/
(P. S. Das)
Chief manager, ERLDC
21
(R K.
L-
$ry
(S. K. Suar)
Deputy Manager, PGCIL AGM(EMD), NTPC/Kaniha
Protection Audit of NTPC/Kaniha
I
CHECK LIST FOR SUB-STATION/SWITCHYARD
Name/Details: NTP C/Kaniha
Protection Scheme
Sl. No
1
Status**
Remarks
Yes
Busl&II-RADSS(ABB)
BUS-III TO VI - TTMTOOO & 7556010
Bus Bar
ME
Stand Alone
Separate for Stage
2.
Event Logger (EL)
Yes
3
Synchronizing FacilitY
Yes
4
Are Synchro Check Relay provided with
DC
5.
Yes
requisite settings?
i)
supply:
Yes
Yes
220v
4BV
6.
DG set
No
7
Auxiliary Supply
Yes
B
Special Protection Scheme (SPS)
Yes
-l
& II
Stage-l IHATHAWAY-SER7000) for
Bays 1 to 17 & Stage-ll (SIEMENS SIESERI for Bays LB to 4L
Provided in synchronizing Trolley
Alsthom-SKD11 for manual closing of
all400 &220 kV Breakers
RASC(ABB) Provided for all lines
[required in case of three phase Auto
Reclosure only)
220v- 02 SETS (400AH each),
48V-02 SETS (50OAH each)
DG Supply is available for the Unit
Emersency Bus ( 415V)
From 11KV Unit Bus of Unit
SPS
-
450 &
SPS
- I &2
- 1000 are available
to take care of the Talcher
-
Kolar
HVDC Pole
Under Frequency RelaY[UFR)
9.
10.
D
iD
iii)
Only Islanding scheme for
:
No
No
No
Stage I
Stage II
Stage III
Generators are available
for
the
House
Load Operation.
Unit-L&2
Unit
-
3 4
-46HZ,1.5Sec
5&6-47
2.0 Sec
Has the Fault
level Increased since
grid?
to
connected
If status at Sl. no 10 is '' Yes", then whether
77
Sectionalization of the bus/ Series
Reactor on the line or bus provided to
limit the fault level?
L2.
Has the size and number of ICT in the S/S
been planned in a way that the outage of
any single unit does not overload the
remaining ICTs or the underlYing
transmission system
Not Applicable
Yes
SCADA:
13.
74.
D
Voice
Ycs
Data
Yes
Yes
Switching Schemes
Wplp
[V. K.alyanrdrhen)
Executive Engineer, ERPC
W,r,rDas)
One and half & Two Breaker scheme
for 400 kV System.
{*^* >tlty,t-
E'L
(S. K Suar)
(R H. Padhfl
NTPC/Ihniha
AGM(EMD),
PGCIL
Manager,
Deputy
ERLDC
Chief rnanager,
[P. S.
Protection Audit of NTPC/Kaniha b
,
I
CHECK LIST FOR SUB-STATION/SWITCHYARD
' Name/Details : NTPC/Kaniha
Sl. No
15
Protection Scheme
Are Circuit Breakers suitable for singleauto
and
76.
\7.
18.
Are Circuit Break(3rs provided with two
Yes
Yes
coils?
Are Circuit Breakers provided with Pre
Insertion Resistors?
Are Earth Switches P rovided at
appropriate locations to facilitate
earthing of outgoing transmission lines to
Yes
20.
21.
')')
23.
Are all main Protection
relaYs of
Yes
No
numerical tYPe?
Are protection functio ns subdivide,l into
two independent groups & capa ble of
providing uninterrupted protection evell
in the event of one protection groups
Yes
Are two sets of DC sources available?
Yes
If status to Sl' No 21 is Yes, then whether
relays are electricallY and physically
segregated into two groups to obtain
redundancy and to take protection
systems out for maintenance whil e the
remains in service?
No 21 is "No", then whether
Sl'
to
If status
el
ectricallY and physically
are
relays
two groups by giving DC
into
s egregated
Pre Insertion Resistors are provided
for all the breakers related to 400 kV
HVDC AC feeders.
Lines
ena ble maintenance?
19.
Remarks
Status**
Line Earth Switches are provided in
400 kV Meramandali Circuit - I & 2,
but Line E/S are not envisaged in 400
Circuit.
kV Rourkela &
Protection
Distance
1
Only the Main of
Protections
II
for all & and Main numerical
Meramandali are of
Yes
N,A
fuses?
24
25
26.
Bus Bar Protection
Yes
Bus Bar Protection scheme has Provision
Yes
for future
Any other Protection
sectionalizing beakers
Two Main Bus are segregated illo I Bus sections each using
x 630KVA Transformers
415v,2
iwitchyard AuxitiariJs fnrm 11KV Unit Bus using L1KV7
i* Check the availability & functional healthiness'
1)
,;
Note:
for Sl No.14 are:
a
level
Scheme
bus
Double
or
Bus
Mai n & Transfer
Dou ble Main & Transfer Bus or Doubrl e bus
bus
B reaker & a half or Double Main and Transfer
) l-/
w.
Executive Engineer, ERPC
W,,,,.
(P. S. Das)
Chief manager, ERLDC
66KV & 132 KV
2201(]'l
40OKV
4^,a n)H)>
(R K Padhi)
Deputy Marrager, PGCIL
(s.
AGM(EMD), NTPC/Kaniha