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® WorleyParsons <br /> resources&energy <br /> INPUTS REQUIRED <br /> ITEM STATUS/UNITS MW MVAR MW- MVAR- COMMENTS <br /> HR HR <br /> Transformers <br /> 5.3 Distributed Control System (DCS) <br /> The DCS will provide control of the balance of plant equipment. The balance of plant <br /> control system will interface with the CTG Turbine Control Panel (TCP), Steam Turbine <br /> Control Panel, Duct Burner Management System PLC, Gas Compressor PLC, CEMS PLC, <br /> Ammonia System PLC, Air Compressor PLC, water treatment system PLC, auxiliary <br /> boiler PLC and HRSG PLC to provide routine operator control including start-up, shut <br /> down, synchronizing, and set point load control from the balance of plant console. <br /> In addition to the control interface provided by the balance of plant control system, the <br /> primary equipment to produce electric power, the CTG and related auxiliaries, will also be <br /> monitored, controlled, and protected via the Turbine Control Panel provided by the turbine <br /> supplier. <br /> The DCS processors will be centrally located in one of Power Distribution Centers located <br /> in the new plant. The DCS I/O racks will be distributed around the site in the Power <br /> Distribution Centers and water treatment area. The DCS communication network will be a <br /> redundant Ethernet, with dual data links to equipment PLCs and dual connected <br /> workstations in the Control Room. <br /> Packaged systems (where applicable), except as noted herein, will be programmed into, <br /> and controlled by the DCS. Control of the continuous emissions monitoring system <br /> (CEMS), HRSG, gas compressor, auxiliary boiler, water treatment system, ammonia <br /> delivery system, and air compressor will be by stand-alone programmable logic controller <br /> (PLC) systems. These PLCs will include an RS-485 link to the DCS, unless approved <br /> otherwise by the Owner, for transfer of process monitoring and status information. Air <br /> compressor and dryer packages will utilize their manufacturers' standard stand-alone <br /> control system(s) with a data link to the plant DCS. Signals for start/stop, lead/lag, and <br /> status (running, trouble, etc.) will be hard wired to/from the DCS unless otherwise provided <br /> by the OEM. <br /> A consistent control and instrumentation philosophy will apply throughout the plant to <br /> minimize diversity of equipment type and manufacturer. <br /> There will be no hardwired discrete control and monitoring operator stations to back up the <br /> LCD's and keyboards. However, individual emergency pushbuttons or switches will be <br /> provided for hardwired shutdown of major equipment(CTG, HRSG, STG and fuel gas shut <br /> off). These push buttons will be mounted in the Plant Main Control Room. <br /> 5.3.1 DCS Equipment <br /> Lodi Energy Center 3.5 -2 LEC AFC <br /> 071608 Rev.A <br />