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A circuit breaker defect location 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 poor pertinence, low accuracy, and narrow application range

Active Publication Date: 2021-10-08
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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  • A circuit breaker defect location method based on failure mechanism analysis
  • A circuit breaker defect location method based on failure mechanism analysis
  • A circuit breaker defect location method based on failure mechanism analysis

Examples

Experimental program
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Embodiment

[0129] Example——Fault Mechanism Analysis of Circuit Breaker Operating Mechanism Based on FTA-FMMEA

[0130] The operating mechanism is not only the key mechanical part for the opening and closing operations of high-voltage circuit breakers, but also according to the latest two (1988-1991, 2004-2007) global surveys led by the International Power Grid Organization The data shows that it is also the circuit breaker action actuator with 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, conduct FTA-FMMEA analysis based on its failure mechanism, and locate the weak link in it.

[0131] First, the spring operating mechanism is divided according to different positions. The operating mechanism can be divided into breaking elements (such as switches, etc.), transmission mechanisms (such as mechanism output links, etc.), bases and operating mechani...

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Abstract

A circuit breaker defect location method based on failure mechanism analysis, the defect location method comprising: collecting historical fault data of the circuit breaker; sorting out the historical data to construct a fault tree model; performing FMMEA analysis on the fault tree to determine the priority of the fault The level is the degree of harm of each failure mode; based on the calculation results of the degree of harm of various failure modes, the degree of harm of the faults is sorted, and the weak links in the design, structure or operation of the system are obtained. The localization distribution of occurrence defects. The invention can not only analyze the cause of the fault, but also obtain the mechanism of fault generation and development, and further strengthen the investigation of targeted equipment defects.

Description

technical field [0001] The invention belongs to the technical field of power systems, and relates to the detection and diagnosis technology of power equipment, in particular to the defect location technology of primary power 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 fault analysis methods in domestic and foreign engineering fields include fishbone diagram, FTA, FMEA, FMECA and FMMEA. [0003] (1) Fishbone diagram (also known as causal diagram, Ishikawa diagram). [0004] Fishbone Diagram is a theory proposed by Japanese management master Kaoru Ishikawa in 1953, which can conveniently and effectively study the correlation between results and causes. It is also one of the popular analysis methods for finding the "root cause" of problems. By sorting out all the possible factors tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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