JPS5532908A - Feed water pump drive turbine controller - Google Patents

Abstract

PURPOSE: To stably supply water to a boiler even when there happen unforeseen or unexpected accidents in a power plant.

CONSTITUTION: The first pressure set instrument 18 putting out fixed pressure value a up to a point D and the second pressure set instrument 19, which increases output from the point D and puts out signals that form bias α to the actual pressure of an intermediate pressure bleed line 11, when a turbine puts out at low value as shown in the figure are mounted to an input terminal of a high value preference circuit 20, and a trigger generator 25 putting out trigger signals beforehand set when there happens FCB (Single operation in a station of a plant) is installed to the second set instrument 19 while the actual pressure signals of the intermediate pressure bleed line 11 are applied through a pressure transducer 24. Signals passing through the high value preference circuit 20 are transmitted to a computing element 21 as the pressure set signals of a reducing valve 14, and reducing valve opening and closing signals are put out from actual pressure signals from a pressure transducer 23 here.

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