TENDER NO. : 7000154-HD-46009 ( TCE : 4380 A –C-719-204)
SUB : AUTOMATION OF POWER SUPPLY SYSTEM AT HPCL -VR
RECORD NOTES OF PRE BID MEETING HELD AT HPCL-VISAKH REFINERY ON 16.11.07
Page
Clause
HPCL spec
TECHNICAL
Vendor’s Remarks / Queries
HPCL/TCE Clarification
166
1.9.4
The active and
reactive power
software shall
generate
necessary control
output.
Emerson Ovation software shall generate MW
and MVAr remote set-points for the generators.
These I/Os shall be sent to the generators’
turbine controller and AVR controller.
Noted
166
164
1.9.4
1.9
Off-line simulation
for deriving the
optimum set-points
for the GTs
Grid Islanding
shall be suitably
integrated with the
load shedding
scheme
in SCADA based
on grid
disturbances
detected.
Ovation shall not do governor control nor AVR
control.
This is an SLFA (static load-flow analysis)
program.
Emerson Ovation software continuously
calculates MW and MVAr set-points for the
generators based on their Local/Remote or
Auto/Manual status. SLFA program is not
required and not provided.
HPCL spec calls for grid islanding for on grid
disturbances to be based on under-freq, df/dt,
under-voltage, dV/dt, negative power.
Emerson informs that grid islanding shall NOT
be done from Ovation. Opening of a power
generation breaker like grid breaker is an
electrical switchboard function and not a DCS
function. However, after the grid breaker opens,
Ovation shall do load-shedding to trip
unnecessary loads to maintain plant's power
stability.
To be provided as per tender
specification
Grid Islanding –
Grid Islanding protection relay is already
installed in an existing 33kv Switchgear.
Grid Islanding protection relay shall be
suitably integrated with Load shedding
scheme in SCADA based on Grid
disturbances detected as below;
• Under Frequency and Df/Dt
• Dv/Dt, Under Voltage with time
delay
• Under Frequency and Reverse
power with time delay
•
Directional over current, under
voltage
After Islanding or tripping the grid
breaker by Islanding relay, load
shedding scheme shall come into
operation depending upon the condition
of the electrical system. An islanding
and load shedding scheme shall be
suitable integrated to enable the refinery
to run isolated from the grid when a grid
disturbance is detected by the islanding
scheme.
Multifunction meter and transducer (for
analogue inputs identified in the SCADA
I/O list) shall be supplied by the SCADA
Vendor.
148,
167
1.2.2.ii,
1.10.1
Supply of IEDs
(data
concentrators,
meters, relays)
Supply of IEDs shall be in switchboard supplier’s
scope. They are not in Emerson scope.
167
1.10.1
Faster
communication
with IEDs if
required.
Communication with IEDs shall be a joint
responsibility of the DCS supplier (Emerson) and
the relay supplier (Others).
All IEDs (MFM, Relays & Data
Concentrators) shall be integrated with
SCADA system with MODBUS protocol
at 19.2 KBPS
148,
167
1.2.2.v,
1.10.1
ECS fibre-optic
data highway,
HDPE duct.
Supply, installation of ECS fibre-optic data
highway and/or HDPE duct is not in Emerson
scope.
148
1.2.2.vi
Minor civil works
Minor civil works is not in Emerson scope.
174
1.14.3.c
SOE time resolution is 1/8 ms.
156
1.4.5
Time resolution of
at least one
millisecond shall
be provided for
time tagging the
SOE events.
All Data
Acquisition
Cabinets / panels
shall be provided
with panelmounted airconditioners with
Supply, installation of ECS fibre optic
data highway and / or HDPE conduit
shall be scada vendor’s scope as per
tender specification
To be considered in the bid as per
tender specification
Noted
The standard Ovation controller and I/O panels
are not air-conditioned, but are kept in airconditioned room.
Air-conditioned panels can be provided for
remote-I/O panels.
Optional price shall be given for Data
acquisition Cabinet with panel mounted
Air conditioner with 100% redundancy
as per Section A5, Clause 4.4.7, Page
10/34.
166
1.9.4.iii
152
1.4.1.10
173
1.14
155
1.4.5
174
1.14.1
100% redundancy.
controlling the
ICT’s OLTC and
the capacitor
banks along with
the reactive power
capability of the
GTG’s
Data Acquisition
unit including all
input, output
module and
processor shall
comply with G3
compliance.
Sequence of Event
Recorder
100% redundant air-conditioning is not required.
Does HPCL require Capacitor bank On/Off logic
and Transformer OLTC logic to be advisory or
automatic?
Each data
acquisition unit
shall have
adequate non
volatile memory to
store the
information
pertaining to
disturbance
The circuit breaker
ON/OFF/TRIP
feedback would be
provided as one
digital input which
shall be used to
trigger both the
SER and also use
the input to update
the status in the
HPCL spec indicates storage of disturbance
information. But there is no information in the
spec regarding a disturbance recorder.
SCADA system shall be provided with
Capacitors ON/OFF logic & OLTC Logic
to be advisory. OLTC tap raise / lower
shall be manually controlled from
SCADA as per optimum set points
decided by SCADA.
Please clarify “G3 compliance”.
All PCBs shall have protective coating
from
environmental
conditions
(Complying to G3 norms)
HPCL spec is describing SOE I/Os, not a
disturbance recorder. In Emerson design, SOE is
a special kind of digital I/O having 1/8 ms time
resolution
Time resolution shall be 1ms or less
than 1ms. Only one input signal shall be
given to SCADA for each feedback to
trigger SOE and update the status. It
shall be SCADA vendor’s responsibility
to design the hardware as per
requirement.
Each data acquisition unit shall have
adequate non volatile memory to store
the
information
pertaining
to
disturbance,
same
shall
be
communicated to SCADA
In Ovation design, all SOE inputs are
automatically stored in the historian.
One or all of On/Off/Trip can be an SOE input. If
more than one, then each is a separate SOE
input.
Emerson recommends trip feedback (relay 86)
for SOE wherever On/Off/Trip is hardwired, else
the Closed (On) feedback.
Wherever On/Off/Trip is on link, HPCL to provide
at least one of them as hard-wired SOE, since
Time resolution shall be 1ms or less
than 1ms. Only one input signal shall be
given to SCADA for each feedback to
trigger SOE and update the status. It
shall be SCADA vendor’s responsibility
to design the hardware as per
requirement.
174
1.14.3.d
mimic diagram).
The system will be
time synchronised
with a GPS clock.
149
1.2.2.ix,
1.2.2.x
ETAP software
and laptop
149
1.2.2.x
201,
251
Appendix
A
ETAP laptop with
hardware lock and
network lock
Communication
interface
164
1.9
Load shedding of
415 V PMCC
motors.
201
Appendix
A
DO for “blocked”
263
Appendix
Breaker Open
commands.
link I/Os cannot logically be an SOE input.
Emerson assumes HPCL/Others shall provide
GPS signal.
Downstream time synchronisation between all
Ovation equipment shall be by Emerson.
Emerson shall provide 2 x ETAP software and
laptop. These laptops shall NOT be a part of
Emerson Ovation network configuration. Use of
ETAP software shall be by HPCL.
Please clarify “hardware lock” on parallel/USB
port, and “network lock” on LAN port.
HPCL to clarify the difference between:
- Serial link thru RS485 from numerical relay
- Using IED thru RS485 port
- Using numerical relay P141 thru RS485 port
Emerson is assuming Modbus communication
over RS485 link.
Emerson informs that load-shedding of 415 V
PMCC motors will not add much to the MW
amount being shed.
Emerson recommends load-shedding of 415 V
PCC/PMCC incomers to trip the whole PMCC.
What is the reason for the "Blocked DO signal"?
Is it for blocking brk closing after load-shed so
that it is not accidentally re-started? If so, why is
it present for capbanks?
Emerson suggests
- Breaker Open DO commands for non-loadshed breakers can be on links.
- Breaker Close DO command for all breakers
can be on links.
GPS shall be supplied by SCADA
vendor as per tender specification
Noted
LAPTOP shall be provided with USB/
Parallel and LAN port for communication
with the system
ALL IEDs (MFM, Data Concentrator &
Relay) shall be integrated with SCADA
system using Modbus protocol thru
RS485 port at 19.2KBPS
Load shedding of 415V of PMCC motors
shall be considered as per tender
specification. Priority schedule shall be
decided during detail engineering
It is blocking signal to the breaker
closing from SCADA during
maintenance / trouble shooting
Closing of breaker shall not be
considered from SCADA. Breaker open
command for all breakers shall be
considered as hardwired signal.
Clause
Section
Page
Description
Vendor’s Remarks / Queries
HPCL/TCE Clarification
4.3.4,
4.3.5
Section
A5
8/34, 9/34
Optical fibre
The refinery overall plot plan is available
in the tender (SCADA KEY network
diagram) and you are required to arrive
to the length of various types of cables
required for this project from the drawing
wherein the co-ordinates are clearly
marked
4.3.1
Section
A5
8/34
Twisted pair
serial link
cable
Since the distance between each sub-station &
control room and the distance between the
substations is not clear from key SCADA
network diagram, it is difficult to finalize on type
of FO cable e.g. Single mode or multimode.
Please provide us the plot plan indicating
distance between each of the substation and
overall RING distance or please indicate the
estimated quantity will bring BOM for all the
bidders at same level
Please indicate the estimated quantity.
Indication the quantity will bring BOM for all the
bidders at same level
4.3.2
Section
A5
8/34
2P x 0.8 sq.
mm. cable
We understand that this cable is for DO wiring.
Please confirm
Please also indicate the estimated quantity.
Indicating the quantity will bring BOM for all the
bidders at same level
Cable quantities can be estimated
based on number of DO signal and
substations
4.3.3
Section
A5
8/34
12P x 0.8
sq. mm.
cable
We understand that this cable is for DI wiring.
Please confirm
Please also indicate the estimated quantity.
Indicating the quantity will bring BOM for all the
bidders at same level
Cable quantities can be estimated
based on number of DI signal and
substations
1.0
AppendixA
-
IO list
It is general practice to provide following
minimum hardwired i/Os for load shedding, P.Q
control application in addition to the hardwired
I/Os mentioned in IO list:
Generator
DI – Generator Trip
DI – Generator Alarm (Summated)
AI – MW (4-20mA Transducers)
AI – MVAR (4-20mA Transducer)
All the signal are included except
isolator which is not necessary.
Breaker/Outgoing Motor /Outgoing Tie/ Outgoing
Transformer
DI – Open status
Serial link cable quantities can be
estimated based on number of IEDs to
be integrated with SCADA as per tender
specification
DI – Close status
AI – MW (4-20mA Transducers)
Isolator / Bus coupler / Incomer / Bus section
DI – Open status
DI – Close status
2.0
Notice
Inviting
Tender
5
Last Date of
receipt of
bid
Please confirm the inclusion of the same by all
the bidders.
Considering the minute detailing to be done on
the bid vis-à-vis offer, you are requested to
extend the last date to December 15, 2007
No time extension shall be given