Nuclear power plant steam turbine valve fault diagnosis method, auxiliary diagnosis method thereof, and test device

Abstract

The invention discloses a nuclear power plant steam turbine valve fault diagnosis method, an auxiliary diagnosis method thereof, and a test device. Through a user instruction corresponding to preset parameter information, the control of state switching action of a valve is carried out, and when the valve acts, the parameter information of switching action of the valve is recorded. Then whether the recorded parameter information and the preset parameter information are matched or not is judged, fault information is generated if not, thus the online fault diagnosis of the steam turbine valve of a nuclear power plant is realized, through comparing the various parameter information generated in the action of the valve and the preset parameter information, the accuracy of judging a problem in a diagnose or test is improved, the applicability is strong, the fault information of most valves in action can be diagnosed, and the efficiency of diagnosis is improved.

Description

technical field [0001] The invention relates to the technical field of nuclear power, in particular to a fault diagnosis method for a steam turbine valve of a nuclear power plant, an auxiliary diagnosis method and a test device. Background technique [0002] A steam turbine is a mechanical device that converts steam energy into mechanical energy and is often used as a prime mover in a power plant. In a steam turbine, the steam inlet valve is the key equipment in the process of start-up, operation adjustment and shutdown of the steam turbine, and under abnormal and faulty conditions of the steam turbine, if the steam inlet valve cannot quickly adjust the steam intake or close the valve, it will Lead to excessive steam turbine speed and even dangerous situations such as speeding accidents. Therefore, the reliability of steam turbine inlet valve performance and its fault diagnosis are very important to the safe operation of steam turbine. [0003] In traditional power plants,...

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Problems solved by technology

[0003] In traditional power plants, it is still possible to perform a simple fast closing time test on the steam turbine inlet valve, but it is not possible to conduct a complete performance test, and in the event of jamming or other failures, it is impossible to timely and effectively monitor the real-time conditions make a diagnosis

[0004] In response to the above problems, some existing power plants have developed simple valve test devices, but there are still problems such as single function and poor applicability.

At the same time, the existing power plants do not have special devices and software systems for online fault diagnosis, and the diagnostic structure obtained by the diagnostic method used is inaccurate and insufficient.

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