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Circuit breaker real-time residual life prediction method based on degradation model and data driving

A degradation model, data-driven technology, applied in the direction of prediction, data processing applications, instruments, etc., can solve the problems that PdM decision-making cannot provide remaining life and failure, prediction support, etc.

Pending Publication Date: 2022-07-29
国网陕西省电力有限公司西安供电公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing results only evaluate the current degradation degree of the circuit breaker, and cannot provide more valuable remaining life and failure prediction support for PdM decision-making

Method used

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  • Circuit breaker real-time residual life prediction method based on degradation model and data driving
  • Circuit breaker real-time residual life prediction method based on degradation model and data driving
  • Circuit breaker real-time residual life prediction method based on degradation model and data driving

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Embodiment Construction

[0080] The present invention will be further described in detail below through specific examples. The following examples are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.

[0081] A real-time remaining life prediction method for circuit breakers based on degradation model and data-driven, characterized in that: the steps of the method are:

[0082] (1) Collect circuit breaker status monitoring data that can effectively reflect the degree of equipment degradation

[0083] Accident analysis shows that nearly 80% of circuit breaker failures are caused by the abnormality of its secondary circuit (29%) and operating mechanism (43%). Therefore, the secondary circuit and the operating mechanism are the most important monitoring parts in the condition assessment. The current waveform of the trip coil during the tripping operation of the circuit breaker is as follows figure 1 As shown, the present invention extracts the time charac...

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Abstract

The invention relates to a circuit breaker real-time residual life prediction method based on a degradation model and data driving. Five time characteristic quantities are extracted from a circuit breaker tripping / closing coil current waveform and a circuit breaker auxiliary contact voltage waveform in the tripping / closing operation process to serve as state monitoring data to construct a degradation degree index of a high-voltage circuit breaker; then, establishing an exponential type degradation model of the high-voltage circuit breaker based on an exponential type function relationship between a degradation degree index and an operation frequency; and finally, off-line estimation is carried out on initial values of parameters in the model by using maximum likelihood estimation, and a Bayesian algorithm is introduced to realize on-line updating of the parameters, so that historical data and on-line monitoring data are combined to realize real-time residual life prediction of the high-voltage circuit breaker.

Description

technical field [0001] The invention belongs to the field of power protection, and relates to the prediction of the remaining life of a relay, in particular to a real-time remaining life prediction method of a circuit breaker based on a degradation model and data-driven. Background technique [0002] The circuit breaker plays a dual role of protection and control in the power system, and is one of the most important power equipment. Breaker failures can cause grid failures or expand the scope of failures, or even cause cascading failures that lead to system disintegration. As the online service time of the circuit breaker increases, its trip / close operation performance and operational reliability will be continuously reduced due to factors such as wear of the operating mechanism or aging of components. Therefore, a perfect maintenance strategy is a necessary guarantee for the continuous and reliable operation of the circuit breaker, thereby ensuring the safe and stable oper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q10/06G06Q10/00G06F17/13G06F17/16G06Q50/06
CPCG06Q10/04G06Q10/0639G06Q10/20G06F17/13G06F17/16G06Q50/06
Inventor 李珂常非谈震孙晨辰胡喆白泽阳李永丽卢扬陈晓龙孙丽蓉
Owner 国网陕西省电力有限公司西安供电公司