DCS System Renovation Implemented at Urumqi Thermoelectronical Plant

With respect to operating requirement, technology specification and relevant industry standard, design an integrated DCS system which includes three independent sub-system: No.4 unit, No.5 unit and electrical system.

Provide any hardware and software that are needed by the DCS system, including system software, operating software, application software, interface software, test software, failure diagnosis software, and so on.

Be responsible for software configuration and system debugging according to DCS technical specification.

Be responsible for DCS system engineering design and installation design, including DAS, MCS,SCS,FSSS control logic diagram, I/O signal distribution between DCS and main unit and secondary unit as well as the wiring diagram between DCS and external equipment, DCS internal power supply diagram and power distribution diagram, detailed list of internal cables. Following items are included:

DCS human-computer interface design for including operator station, engineer station and history station

Design on functions of data collection

Design on functions of analogue control

Design on boiler security monitoring system, including fire control system.

Design on boiler and steam turbine sequence control

Steam turbine ETS control system design

Monitoring and operation functions design which is carried out on plant power supply.

h) Design on Common plant power supply

i) Deslagging system design

j) design on draught fan speed variation system

k) Remote I/O design

l) Design on interface with other control system

DCS grounding system design, including specification relating to internal grounding for each cabinet and the grounding between cabinets.

According to the design scope established for each side, provide buyer with interface material and drawing that are needed in design stage.

Provide equipment layout diagram, regulating block diagram, control logic diagram, wiring diagram and other diagram as well as technical material. New version number is indicated in the form of number or letter that should appear inside relevant column.

Submit requirement on cables that are used inside cabinet and between cabinets. Be responsible for supply of these cables.

Provide general specification on the DCS system, specification on various functions, including specification on hardware, software and system design.

Inside manufacturing center, participated by experts and experienced professionals, via emulation and testing equipment, with the introduction of DCS I/O signal, operation, test and demonstration under closed-loop are carried to verify DCS functions and performance meet design requirement stipulated in this document.

According to requirement of this document, provide entire drawing and material that are needed in construction document design, installation and debugging, operation maintenance and system secondary development. Provide instruction on system installation

Provide services on power on test and debugging, until the DCS system can operate normally under various conditions.

Provide the buyer with any system document that is indispensible for DCS optimize operation, so as to make it possible for the buyer to perform configuration,

programming, repairing, modification and debugging of the DCS system.

Be responsible for training of personnel responsible for maintenance and operating of the DCS system until they can undertake these works skillfully.

Be responsible for communication test between this system and the third side system. Systems that communicate with DCS system include:

a) automobile digital electrohydraulic control system(DEH)

b) micro oil ignition system(PLC)

c) furnace bottom dragyeyer control device(PLC)

d) Steam turbine security monitoring instrument(TSI)

e) Boiler pipe leakage monitoring system

f) electrostatic precipitator control system

g) Special equipment developed for control system of generator unit(AVR,ASS,AST)

h) Intelligent monitoring system applied by DC system and UPS

i) Generator transformer protection device

j) PLC system developed for steam turbine heating unit

k) Electrical energy measuring device

（一）Main function of the DCS system

DCS system involves following subsystem/functions:

Data collection system (DAS)

Sequence control system developed for boiler and steam turbine(SCS(B/T))

Steam turbine ETS control system

Plant power supply monitoring and operating system(G/A)

Boiler hearth security monitoring system(FSSS)

Steam turbine protection system(DCS will include steam turbine ETS, control logic will be implemented in DCS)

Human-computer interface (MMI)

Engineering station (EWS)

Data communication system

SOE function

Clock synchronization, history recording, operation recording, out-of-tolerance reporting, performance calculation, OPC function and so on

DCS system configuration

DCS system utilizes 1000/100MB redundant optic-fiber connection. Control system consists following parts: engineering station, operator station (AW70,WP70 processor and printer), history tendency station, control station and I/O card (FCP control processor, I/O module), system communication network(control network, high speed local bus) and network interface equipment(OPC),cabinet and operating desk.

he configuration of DCS system can be described as follow:

Operation station:10 pcs, engineering station: 2 pcs, mobile engineering station :1, history station (also works as OPC):3,process controller:13 pairs, switch: 6 pcs

System is equipped with whole set of I/A system internal connection cable

The internal configuration for each cabinet meets requirements stipulated in the bidding document.

The remote I/O applied the same hardware as that applied by main control section. As for I/A system, there is no difference between remote I/O

management and local I/O management. The remote I/O card is merely connected with system controller via optical fiber. This technology simplified

configuration, improved system reliability, and minimized the number of spare parts. After the system has been established, the reliability and stability

of production equipment is improved, which will be conducive to increase of production and improving economic performance without influencing security

in production. At the same time, connection with information network at higher level is possible , as a result, general management and control capability is

also raised.