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Circuit breaker defect positioning method based on failure mechanism analysis

A positioning method and failure mechanism technology, applied in the direction of circuit devices, AC network circuits, electrical components, etc., can solve problems such as inaccurate analysis results of complex equipment, single analysis results, and lack of pertinence

Active Publication Date: 2020-03-24
STATE GRID JIANGSU ELECTRIC POWER CO LTD MAINTENANCE BRANCH +1
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Problems solved by technology

The disadvantages are: first, the scope of application is narrow; second, the pertinence is not strong, and the cause analysis is not sufficient; third, the analysis results of complex equipment are not accurate, etc.
[0011] In view of the existing problems in the analysis of equipment defects, such as relying on expert experience, single analysis results, insufficient pertinence, and low accuracy

Method used

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  • Circuit breaker defect positioning method based on failure mechanism analysis
  • Circuit breaker defect positioning method based on failure mechanism analysis
  • Circuit breaker defect positioning method based on failure mechanism analysis

Examples

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Embodiment

[0131] Example——Analysis of Failure Mechanism of Circuit Breaker Operating Mechanism Based on FTA-FMMEA

[0132] The operating mechanism is not only the key mechanical part of the high-voltage circuit breaker for opening and closing operations, but also according to the recent two global surveys (1988-1991, 2004-2007) led by the International Large Power Grid Organization The data shows that it is also the circuit breaker action actuator that has the highest frequency of failures in recent years and the failure rate is increasing year by year. This section will take the spring operating mechanism of the circuit breaker as an example, and conduct FTA-FMMEA analysis based on its failure mechanism to locate the weak link.

[0133] First of all, the spring operating mechanism is divided into different positions. The operating mechanism can be divided into breaking elements (such as switches, etc.), transmission mechanisms (such as mechanism output linkages, etc.), bases and operating ...

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Abstract

The invention discloses a circuit breaker defect positioning method based on failure mechanism analysis. The defect positioning method comprises the following steps: acquiring historical fault data ofa circuit breaker; classifying and sorting historical data, and constructing a fault tree model; performing FMMEA analysis on the fault tree, and determining the priority of the fault, namely the hazard degree of each fault mode; and based on the hazard degree calculation results of various fault modes, sorting the hazard degrees of the faults to obtain system weak links in design, structure or operation so as to determine the positioning distribution of possible defects of the circuit breaker. According to the method, the fault reason can be analyzed, the fault generation and development mechanism can be obtained, and then targeted equipment defect troubleshooting is enhanced.

Description

Technical field [0001] The present invention belongs to the technical field of electric power systems, and relates to detection and diagnosis technology of electric power equipment, in particular to defect location technology of primary electric equipment. Background technique [0002] The circuit breaker is an important device in the power grid, and the safe operation of the circuit breaker is of great significance to the stability of the power grid. At present, the commonly used failure analysis methods in engineering fields at home and abroad include fishbone diagram, FTA, FMEA, FMECA and FMMEA. [0003] (1) Fishbone diagram (also known as cause and effect diagram, Ishikawa diagram). [0004] Fishbone diagram is a theory proposed by Japanese management master Mr. Ishikawa Xin in 1953 that can conveniently and effectively study the correlation between results and causes. It is also one of the popular analysis methods to discover the "root cause" of the problem. The researchers or...

Claims

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Application Information

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IPC IPC(8): H02J3/00
CPCH02J3/00
Inventor 戴锋车凯陈昊陈韬陈轩叶昱媛邓凯张海华赵英浩杨海铭
Owner STATE GRID JIANGSU ELECTRIC POWER CO LTD MAINTENANCE BRANCH
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