High-voltage circuit breaker fault diagnosis method based on adaptive grey correlation analysis

A technology of gray relational analysis and high-voltage circuit breakers, which is applied in circuit breaker testing, spectral analysis/Fourier analysis, instruments, etc., can solve the problem of complex feature extraction methods, diagnostic results constrained by sample size, and gray relational degree discrimination Insufficient and other problems, to achieve good practicability, accurate and reliable results of fault diagnosis
CN112269124APending Publication Date: 2021-01-26XIAMEN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
XIAMEN UNIV OF TECH
Publication Date
2021-01-26

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Abstract

The invention discloses a high-voltage circuit breaker fault diagnosis method based on adaptive grey correlation analysis, which comprises the following steps: step A, acquiring multiple groups of fault current signals of switching-on and switching-off coils of high-voltage circuit breakers of various fault types, and respectively performing Hilbert-Huang transform, extracting current and time characteristic values to form a fault characteristic sequence, and performing FCM clustering on all fault characteristic sequences to obtain a typical fault characteristic sequence of each fault type; B,acquiring an operation current signal of a closing and opening coil when the high-voltage circuit breaker operates, performing Hilbert-Huang transform on the operation current signal, and extractingcurrent and time characteristic values to form a to-be-diagnosed characteristic sequence; and C, performing gray correlation analysis on the to-be-diagnosed feature sequence and the typical fault feature sequence of each fault type so that the gray correlation degree of the to-be-diagnosed feature sequence and the typical fault feature sequence of each fault type is obtained, and thus the fault type of the to-be-diagnosed feature sequence is obtained.
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Description

technical field

[0001] The invention belongs to the field of circuit breaker fault diagnosis, in particular to a high voltage circuit breaker fault diagnosis method based on self-adaptive gray relational analysis. Background technique

[0002] With the development of social economy, the scale of power grid is getting larger and larger, and people put forward higher requirements for the safe operation of power system. As an important switchgear in the power system, the high-voltage circuit breaker plays the role of control and protection. Its good operation status is the key to the normal and safe operation of the substation and the power system. Therefore, identifying the fault state of the high-voltage circuit breaker in time can avoid equipment damage or system disconnection, and improve the reliability of power grid operation.

[0003] According to relevant data, the maintenance cost of high-voltage circuit breakers accounts for more than 50% of the substation, and 60% o...

Claims

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