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