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Circuit breaker abnormity discrimination method based on wavelet packet transform and normal distribution law

A technology of wavelet packet transformation and normal distribution, which is applied in circuit breaker testing, instruments, and measuring electrical variables, etc., can solve problems such as high cost, susceptible to electromagnetic interference in the measurement process, and low promotion value

Inactive Publication Date: 2017-08-22
CHINA SOUTHERN POWER GRID COMPANY +1
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Problems solved by technology

However, this method requires an additional measuring device, which is costly, complicated to operate, and the measurement process is susceptible to electromagnetic interference, so the actual promotion value in practical applications is not high

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  • Circuit breaker abnormity discrimination method based on wavelet packet transform and normal distribution law
  • Circuit breaker abnormity discrimination method based on wavelet packet transform and normal distribution law
  • Circuit breaker abnormity discrimination method based on wavelet packet transform and normal distribution law

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0026] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinatio...

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Abstract

The invention discloses a circuit breaker abnormity discrimination method based on wavelet packet transform and the normal distribution law. The fault characteristic quantity is acquired according to wavelet packet transform analysis, the circuit breaker arcing time data are statistically analyzed, fitting of the data is performed by using a normal distribution function, and the reasonable circuit breaker arcing time range is divided according to the probability distribution obtained through fitting to act as the discrimination basis for the abnormity of the circuit breaker. According to the method, the arcing time of the circuit breaker is obtained by processing the recording data so that the real-time performance is great without configuring other devices.

Description

technical field [0001] The invention relates to the technical field of electric power automation, in particular to a circuit breaker abnormality discrimination method based on wavelet packet transformation and normal distribution law. Background technique [0002] High-voltage circuit breaker is an important switchgear in the power system, which is responsible for the protection and control of the power grid. Its malfunction and refusal to operate often cause accidents or expand accidents, causing huge economic losses and social impact. In order to achieve safe and stable power supply, the power grid puts forward higher requirements on the reliability of high-voltage circuit breakers. [0003] The operational reliability of high-voltage circuit breakers depends on effective condition monitoring and fault diagnosis (abnormality discrimination), and its accuracy and practicability directly affect the judgment of the performance status of the circuit breaker. Scientifically fo...

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Application Information

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IPC IPC(8): G01R31/327
CPCG01R31/3275
Inventor 郑茂然陈宏山余江丁晓兵孟晓承许易经韩学山高宏慧张静伟
Owner CHINA SOUTHERN POWER GRID COMPANY
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