Fault diagnosis method and device

Abstract

The invention provides a fault diagnosis method and device, and relates to the technical field of nuclear power plants. The method comprises the steps: obtaining the operation data of evaluation parameters corresponding to each fault symptom in a preset fault symptom set of a control rod misplug fault; determining the confidence coefficient of the fault symptom according to the operation data; determining whether the control rod misplug fault is established or not according to the confidence coefficient of the fault symptom and thecorresponding diagnosis rule of the control rod misplug fault in a preset fault diagnosis confidence rule base, and obtaining a determination result; and outputting a corresponding fault diagnosis conclusion according to the determination result. According to thefault diagnosis method and device, the fault diagnosis confidence rule base is pre-established, the confidence coefficient of the fault symptom related to the control rod misplug fault is calculated,whether the control rod misplug fault is established or not can be automatically diagnosed in real time in combination with the related diagnosis rules in the confidence rule base, the influence of human factors is reduced, the fault misjudgment rate is reduced and emergency operation guidance is provided.

Description

technical field [0001] The invention relates to the technical field of nuclear power plants, in particular to a fault diagnosis method and device. Background technique [0002] Due to the strong coupling between the operating equipment of nuclear power plants and the complex and changeable operating conditions of the system, in the fault diagnosis, there are common problems such as the difficulty of establishing and perfecting the fault knowledge base, and the low fault accuracy rate, which seriously restricts the development of fault diagnosis technology. And the practical application of fault diagnosis system, and the research on typical faults of nuclear power plants is of great significance to promote the diagnosis technology of nuclear power plants. [0003] At present, few diagnostic systems established for typical faults of nuclear power plants have been successfully applied in the field, and the current diagnosis of PWR nuclear power plant faults is mainly carried ou...

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Problems solved by technology

[0002] Due to the strong coupling between the operating equipment of nuclear power plants and the complex and changeable operating conditions of the system, in the fault diagnosis, there are common problems such as the difficulty of establishing and perfecting the fault knowledge base, and the low fault accuracy rate, which seriously restricts the development of fault diagnosis technology. and the practical application of the fault diagnosis system, and the research on the typical faults of nuclear power plants is of great significance to promote the diagnostic technology of nuclear power plants

[0003] At present, few diagnostic systems established for typical faults of nuclear power plants have been successfully applied in the field, and the current diagnosis of PWR nuclear power plant faults is mainly carried out manually. Due to human subjective factors, it is easy to cause misjudgment. For post-event diagnosis, emergency operation guidance cannot be provided in time

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