Control system and control method for liquid level switch periodic tests in nuclear power plant and storage medium

Abstract

The invention provides a control system and control method for liquid level switch periodic tests in a nuclear power plant and a storage medium. The system comprises a startup selection module for starting a periodic test of a plurality of rows of liquid level switch assemblies and for selecting a corresponding liquid level switch test; a control execution module that cuts a test row off a DCS protection system and operating water injection isolation components corresponding to the selected test row; a signal receiving module which receives the liquid level signal from the test row of the selected liquid level switch assemblies, transmits the liquid level signal to the control execution module and outputs the test result to the liquid level switch. By integrating the control system modulesin the DCS system, only a step of cutting off the liquid level switch signal of the test row from the DCS protection system during the test is needed, and the liquid level switch assemblies in non-test rows are still protected, thus solving the defects in the prior art that require additional hardware for control and the technical problems that equipment failures cause malfunction of the DCS protection system in the prior art, and facilitating safe operation of the unit.

Description

technical field [0001] The invention relates to the technical fields of thermal power and nuclear power, and relates to a design scheme for periodic tests of liquid level switches and pressure switches in power plants, in particular to a control system, control method and storage medium for periodic tests of liquid level switches in nuclear power plants. Background technique [0002] Liquid level switches are commonly used in power plants to monitor the water level of containers. Generally, three liquid level switches are used for liquid level interlock protection. When the liquid level of the water tank reaches a certain value, the liquid level switch will act. Because the liquid level switch is usually a mechanical , if there is a possibility of refusal to move if there is no action for a long time, and the liquid level switch involves the system interlock protection function, it is very important, so it is necessary to verify the quality of the liquid level switch through ...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the safety hazards of high failure rate, failure of DCS interlock protection function or misoperation existing in the prior art, and provides a kind of integration and high safety, which can avoid DCS protection caused by extra hardware devices. Control system, control method and storage medium for periodic test of liquid level switch in nuclear power plant with system damage

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