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Nuclear power system fault diagnosis method and system

A technology for system faults and diagnostic methods, applied in nuclear methods, special data processing applications, design optimization/simulation, etc., can solve problems such as the inability to accurately determine complex accidents in nuclear power systems, and achieve the goal of improving diagnostic accuracy and adaptability. Effect

Active Publication Date: 2020-10-13
HARBIN ENG UNIV
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Problems solved by technology

[0008] However, it is not possible to accurately determine complex accidents in nuclear power systems based on the above prior art

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  • Nuclear power system fault diagnosis method and system
  • Nuclear power system fault diagnosis method and system
  • Nuclear power system fault diagnosis method and system

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Embodiment Construction

[0065] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0066] The purpose of the present invention is to provide a nuclear power system fault diagnosis method and system to improve the accuracy of determining complex accidents in the nuclear power system.

[0067] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0068] f...

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Abstract

The invention relates to a nuclear power system fault diagnosis method and system. According to the nuclear power system fault diagnosis method and system, through a trained nonlinear support vector machine model, the fault category of each subsystem in a nuclear power system and the fault occurrence probability corresponding to the fault category can be accurately obtained; after a normalizationcoefficient is determined according to the fault occurrence probability in a constructed two-dimensional fault probability matrix, a fault probability value corresponding to each fault is determined according to the normalization coefficient; and the difference value between a first large fault probability value and a second large fault probability value in the probability values after descendingsort is compared with a set threshold value to obtain the fault diagnosis result of the nuclear power system, so that the adaptability of the whole nuclear power system fault diagnosis method and system is improved while the diagnosis accuracy is improved.

Description

technical field [0001] The invention relates to the field of nuclear power system detection, in particular to a nuclear power system fault diagnosis method and system. Background technique [0002] Different from other power plants, the nuclear power system has a complex structure and has radioactive hazards, and has extremely high requirements for safety. At the same time, the space of the marine nuclear power system is limited, and the equipment layout is relatively compact, so it is impossible to carry too many maintenance personnel, which requires very high reliability of the nuclear power system and key equipment. In addition, the operating environment of the marine nuclear power system is harsh, and the key equipment of the system works continuously for a long time, so it is extremely prone to failure. If the equipment fails to detect and repair it in time, it may cause serious radioactive consequences and endanger the lives of the crew. [0003] At present, most of t...

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Application Information

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IPC IPC(8): G06F30/20G06N20/10G06F111/08
CPCG06F30/20G06N20/10G06F2111/08
Inventor 王航彭敏俊夏庚磊孙原理刘博文王晓昆
Owner HARBIN ENG UNIV
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