Water supply control system and control method considering pressure drop of water supply control valve in nuclear power station

Abstract

A feedwater control system considering a pressure drop of feedwater control valve in a nuclear power plant and a control method therefor are provided. In the feedwater control system, a first detection unit includes: a flow error signal generator for generating a flow error signal corresponding to a difference between a steam flow signal and a feedwater flow signal; and a water level correction error signal generator for generating a water level correction error signal corresponding to a sum of a water level measurement signal and the flow error signal. A second detection unit includes: a pressure drop sensor unit for detecting a pressure difference between front and rear portions of at least one feedwater control valve among the main feedwater control valves and the downcorner feedwater control valves and generating a pressure drop signal corresponding to the detected pressure difference; a pressure drop setup value signal generator for generating a pressure drop setup value signal corresponding to a previously set pressure drop setup value of the feedwater control valves; and a pressure drop error signal generator for comparing the pressure drop signal with the pressure drop setup value signal and generating a pressure drop error signal. A control unit controls the main feedwater pump based on a correction control signal output from the correction control signal generator.

Description

[0001] This application claims priority from Korean Patent Application No. 2003-49539 filed with the Korean Intellectual Property Office on July 19, 2003, the entire disclosure of which is hereby incorporated by reference. technical field [0002] The present invention relates to a water supply control system and its control method, in particular, a water supply control system and its control method considering the pressure drop of a water supply control valve in a nuclear power plant, which can maintain the control valve pressure regardless of the nuclear reactor power or the type and number of water supply devices. The pressure drop is constant. Background technique [0003] A nuclear power plant typically includes systems with 100 or more independent functions. These systems include the Nuclear Steam Supply System (NSSS) at the heart of the reactor, the turbine / generator system that draws in steam to turn a generator to generate electricity, and other additional equipment...

AI Technical Summary

Problems solved by technology

In addition, it can solve the problem of unstable control or decreased control performance that may be caused by high or low pressure drop of the feed water control valve

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