Control system and control method of water supply valve

By designing a water supply valve control system and using liquid level and flow measurement values ​​for closed-loop control, the problem of inaccurate valve opening caused by flow meter failure was solved, rapid response and stable control were achieved, and the stability and response speed of the system were improved.

CN120760122APending Publication Date: 2025-10-10CHINA NUCLEAR POWER ENGINEERING COMPANY LTD +1
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Patent Information

Application Number
CN202510814773.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-17
Publication Date
2025-10-10

AI Technical Summary

Technical Problem

In the prior art, when the flow meter of the steam generator feed water valve fails, the opening cannot be accurately controlled, which may cause the power station protection to be activated and affect the system stability.

Method used

A water supply valve control system was designed, which included a fault detection module, a first and a second control module, and a valve control module. The system used a PID control unit and a calculation unit to perform closed-loop control based on liquid level and flow measurement values, achieving rapid response and fault switching, and preventing flowmeter failure from affecting valve opening.

Benefits of technology

It achieves rapid response and stable control of valve opening in the event of flow meter failure, avoids the impact of flow meter failure on the system, and improves the stability and response speed of the control system.

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Abstract

The invention discloses a control system and method for a water supply valve. The control system comprises a fault detection module, a first control module, a second control module and a valve control module. The first control module is used for obtaining a first adjusting parameter according to a liquid level set value of the steam generator, a liquid level measurement value of the steam generator, a feed water flow measurement value and a steam flow measurement value under the condition that the first state switching signal is received. The second control module is used for obtaining a second adjusting parameter according to the liquid level set value and the liquid level measured value under the condition that the second state switching signal is received. When the water supply flow meter and / or the steam flow meter breaks down, the fault detection module can output a corresponding second state switching signal to complete state switching of the control system, so that the valve control module can obtain a corresponding valve opening degree adjusting signal based on a second adjusting parameter provided by the second control module, and the valve opening degree is adjusted. And the water supply flow meter and / or the steam flow meter are / is prevented from continuously influencing the control of the opening degree of the water supply valve.
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