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operated in either fixed pressure or variable pressure operation. CCS is an integrated control
design that ensures safe and efficient coordinated unit operation.
Boiler Control System (BCS)
BCS provides automatic combustion control of the combustion process. Based on the steam
load demand, BCS controls combustion by coordinating fuel, air, and furnace pressure. To
accomplish optimal combustion control, BCS can coordinate single or multi-fuels, pulverizer
and mills, FD/ID fans, and air/gas flow while maintaining a safe operation.
Furnace Safety Supervisory System (FSSS)
FSSS supports continuous monitoring of the combustion in the furnace—performing logic
evaluations, dispatching operation instructions, and executing interlocking permissives in
combustion control per procedures during normal boiler start-up and shut-down. When an
abnormal situation or malfunction occurs, FSSS can respond quickly to stop fuel accumulation
in the furnace, thus maintaining a safe operating environment by preventing accidents such
as boiler explosion.
Turbine Control System (TCS)
TCS includes large steam turbine control, feed pump turbine control, the turbine bypass control
system, the emergency trip system, and the turbine supervisory instrumentation system.
Balance of Plant (BOP)
BOP controls all plant equipment outside of the boiler, turbine and generator. As a part of the
total integrated solution for the OC 6000e DCS, this goes beyond the scope of conventional
BOP and includes:
• Circulatingwaterpumpsystem
• Fueloilpumpsystem
• Ashremovalsystem
Sequential Control System (SCS)
SCS provides open-loop control for plant auxiliary equipment. This includes start/stop,
interlocks, and protection functions. SCS is comprised of equipment level control, sub-
group level control and group level control.
Electric Control System (ECS)
ECS provides monitoring and control for all electric equipment in the power plant on an
integrated platform. Monitoring and control includes:
• Generator-transformerunits
• Monitoringandcontrolofthe6kVBusSystem
• Monitoringofthe380VBusSystem
• MonitoringandcontrolofsystemssuchasDCandUPS
ECS performs electric logic lock and interlock using various DCS logic functions, while
completing the monitoring of the bus and generator-transformer. Those functions include,
but are not limited to, standby automatic operation, safety power supply automatic
operation, diesel generator automatic start, and interlock of breakers. The common system
can be monitored and controlled by an individual ECS via gateway. Only an operator of one
unit has the authority to operate the common system at any time.
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• Chemicalwatertreatmentsystem
• Dustremovalsystem
• Coalconveyingsystem