Coordinated control system for an electric power plant

F - Mech Eng,Light,Heat,Weapons – 01 – K

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322/6.4

F01K 13/02 (2006.01) F01K 3/22 (2006.01) F22D 5/26 (2006.01) H02P 9/04 (2006.01)

Patent

CA 1156718

COORDINATED CONTROL SYSTEM FOR AN ELECTRIC POWER PLANT ABSTRACT OF THE INVENTION The operation of an electric power plant is controlled by generating a control signal in response to the pressure at the throttle valves, the load demand signal and the megawatt output of the power plant. During the start- up, before the pressure ramp ends, the control signal varies in accordance with the difference between the pressure at the throttle valves and the pressure required at the throttle valves to produce the load represented by the load demand signal and, after the pressure ramp ends, the control signal is varied in accordance with the difference between the load represented by the load demand signal and the megawatt output of the power plant. Integral separators are employed during start-up to separate the water from the steam and a bypass system is provided to collect the water from the separators and recirculate it. The firing rate of the furnace is controlled in accordance with the control signal. After the bypass system has gone out of service, the feedwater pump is controlled in accordance with the control signal. After the pressure ramp ends, the position of the throttle valves is controlled in accordance with the control signal.

368380

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