Standard Technical Features of BTG System for Supercritical 660 ...
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Standard Technical Features of BTG System for Supercritical 660 ...

Standard Technical Features of BTG System for Supercritical 660 ... Standard Technical Features of BTG System for Supercritical 660 ...

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12.07.2015 Views

Standard Technical Features of BTG System for Supercritical 660/800 MW Thermal Units17.1.2 Unit control & monitoring philosophyi) The control & monitoring of the plant is envisaged from two locations:a) From Unit Control Room (UCR)There shall be one common UCR for controlling the boilers,turbine-generators and unit auxiliaries. Accordingly, the layout ofUCR shall be developed to accommodate the complete controlequipment associated with each unit and the control interfaceequipment for common facilities of the plants.b) From local control stations for auxiliary plants and off site plants.ii)Control & Monitoring from Unit Control Rooma) The main plant equipment (namely steam generator & auxiliaries,TG & auxiliaries, regenerative cycle equipment, equipment coolingwater system etc.) is envisaged to be controlled from the operatorworkstation (OWS) mounted on the unit control desk (UCD) in theunit control room (UCR) under all regimes of operation i.e. start-up,shutdown, load throw off and emergency handling. In addition,minimum 4 nos. large video-screens of minimum size of 170 cm(67”) per unit shall be provided. In addition to the operator workstations (OWS) & large video screens (LVS) mentioned above,minimum amount of back- up instrumentation viz. conventionalpush-button (PB) stations and status indicators shall be provided forsafe shut down of the unit.b) Operation of generator, generator auxiliary systems and breakers for11kV (unit and station switchgears), 3.3 kV switchgear and 415 Vassociated with the main plant and DG sets shall also be performedthrough OWS.c) The operation of CW pumps shall be integrated in DDCMIS with aprovision for operation of CW pumps from unit OWS as well asfrom local control panel/ local push button station to be provided inthe CW pump house.iii)Control & Monitoring of the Auxiliary PlantsThe control, monitoring & operation of the auxiliary plants (i.e. ESPsystem, centralized oil purification system for TG, condensate polishingsystem etc.) shall be carried out from local control panel/operatorworkstation of the respective plants. For all such plant information linkshall be provided for collection of data in the DDCMIS in UCR for theinformation of unit in-charge /shift-in-charge etc.136

Standard Technical Features of BTG System for Supercritical 660/800 MW Thermal Unitsiv)Control & Monitoring of Off Site PlantsThe control, monitoring and operation of the off-site plants i.e. coalhandling plant, ash handling plant, fuel oil plant, D.M. plant etc. (notforming part of BTG system) shall be carried out from the local controlpanel/operator work station. All hardware and software shall be providedat BTG end for establishing a link for collection of data in the DDCMISin UCR through soft link. However, as stated above, CW pumps shall beoperated from unit OWS as well as from local control panel in CW pumphouse.17.1.3 Environmental conditionsInstruments, devices and equipments shall be suitable for continuous operationin the operating environment of a coal fired station and shall be designed forambient temperature range of 5 0 C to 55 0 C and RH of 5% to 100% (95% forindoor location). For air conditioned areas, normal temperature shall beconsidered as 24 0 C +/- 5 0 C and RH in the range 5% to 95%.17.2 Distributed Digital Control, Monitoring and Information System(DDCMIS)The microprocessor based integrated distributed digital control, monitoring &information system (DDCMIS) shall be provided for the safe and efficientoperation of steam generator, turbine generator and all auxiliaries under allregimes of operation.The DDCMIS shall basically consist of:i) Control system of boiler, turbine & balance of plant (namely SG- C&I,TG- C&I & BOP- C&I including their respective measurement systems).ii)iii)iv)Man-Machine interface and plant Information system (MMIPIS).System programming, maintenance & documentation facility.Data communication system (DCS).v) Sequence of events (SOE) recording system.vi)Annunciation system.vii) Master & slave clock system.17.2.1 General requirementsi) System ExpandabilityModular system design shall be adopted to facilitate easy systemexpansion through the addition of controller modules, process I/O cards,drive control modules, push button stations, peripherals likeTFT/Keyboards, printers etc. The system shall have the capability to addany new control loops groups/subgroups in control system while theexisting system is fully operational.137

<strong>Standard</strong> <strong>Technical</strong> <strong>Features</strong> <strong>of</strong> <strong>BTG</strong> <strong>System</strong> <strong>for</strong> <strong>Supercritical</strong> <strong>660</strong>/800 MW Thermal Unitsiv)Control & Monitoring <strong>of</strong> Off Site PlantsThe control, monitoring and operation <strong>of</strong> the <strong>of</strong>f-site plants i.e. coalhandling plant, ash handling plant, fuel oil plant, D.M. plant etc. (not<strong>for</strong>ming part <strong>of</strong> <strong>BTG</strong> system) shall be carried out from the local controlpanel/operator work station. All hardware and s<strong>of</strong>tware shall be providedat <strong>BTG</strong> end <strong>for</strong> establishing a link <strong>for</strong> collection <strong>of</strong> data in the DDCMISin UCR through s<strong>of</strong>t link. However, as stated above, CW pumps shall beoperated from unit OWS as well as from local control panel in CW pumphouse.17.1.3 Environmental conditionsInstruments, devices and equipments shall be suitable <strong>for</strong> continuous operationin the operating environment <strong>of</strong> a coal fired station and shall be designed <strong>for</strong>ambient temperature range <strong>of</strong> 5 0 C to 55 0 C and RH <strong>of</strong> 5% to 100% (95% <strong>for</strong>indoor location). For air conditioned areas, normal temperature shall beconsidered as 24 0 C +/- 5 0 C and RH in the range 5% to 95%.17.2 Distributed Digital Control, Monitoring and In<strong>for</strong>mation <strong>System</strong>(DDCMIS)The microprocessor based integrated distributed digital control, monitoring &in<strong>for</strong>mation system (DDCMIS) shall be provided <strong>for</strong> the safe and efficientoperation <strong>of</strong> steam generator, turbine generator and all auxiliaries under allregimes <strong>of</strong> operation.The DDCMIS shall basically consist <strong>of</strong>:i) Control system <strong>of</strong> boiler, turbine & balance <strong>of</strong> plant (namely SG- C&I,TG- C&I & BOP- C&I including their respective measurement systems).ii)iii)iv)Man-Machine interface and plant In<strong>for</strong>mation system (MMIPIS).<strong>System</strong> programming, maintenance & documentation facility.Data communication system (DCS).v) Sequence <strong>of</strong> events (SOE) recording system.vi)Annunciation system.vii) Master & slave clock system.17.2.1 General requirementsi) <strong>System</strong> ExpandabilityModular system design shall be adopted to facilitate easy systemexpansion through the addition <strong>of</strong> controller modules, process I/O cards,drive control modules, push button stations, peripherals likeTFT/Keyboards, printers etc. The system shall have the capability to addany new control loops groups/subgroups in control system while theexisting system is fully operational.137

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