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Vacuum breaker mechanical state detecting method based on vibration signal analysis

A vacuum circuit breaker, vibration signal technology, applied in the testing of mechanical components, testing of machine/structural components, instruments, etc., can solve problems such as non-periodical

Active Publication Date: 2013-09-18
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The vibration signal of the high-voltage switch is an instantaneous non-stationary signal and has no periodicity

Method used

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  • Vacuum breaker mechanical state detecting method based on vibration signal analysis
  • Vacuum breaker mechanical state detecting method based on vibration signal analysis
  • Vacuum breaker mechanical state detecting method based on vibration signal analysis

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Embodiment Construction

[0056] See figure 1 with figure 2 As shown, the method for detecting the mechanical state of a vacuum circuit breaker based on vibration signal analysis of the present invention includes the following steps:

[0057] 1) Collect the vibration signal during the operation of the VS1 vacuum circuit breaker;

[0058] 2) De-noise the vibration signal collected in step 1) through wavelet decomposition: use matlab's own one-dimensional signal wavelet denoising function wden() to achieve, and the parameter setting is: wavelet base selects bior3.9 wavelet base or bior3.7 Wavelet base, the number of decomposition levels is 3, the heursure threshold is used to quantize the wavelet coefficient threshold, and the soft threshold function is used to complete the denoising;

[0059] 3) The signal after wavelet decomposition is reconstructed in each frequency band, and the reconstructed signal in each frequency band is drawn in the time-frequency-signal amplitude spectrum of the signal using matlab;...

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Abstract

The invention discloses a vacuum breaker mechanical state detecting method based on vibration signal analysis. The method comprises the following steps: 1), acquiring the vibration signal in the action process of a VS1 vacuum breaker; 2), performing wavelet decomposition to the vibration signal acquired in the step 1) in order to de-noise; 3), for the signal subjected to the wavelet decomposition, reconstructing the signal in each frequency band, drawing the reconstructed signal of each frequency band in a time-frequency-signal amplitude spectrum of the signal by mat lab, and calculating the information entropy of each frequency domain band and combining the information entropy of each frequency band of the vibration signal with each other to form a fault feature vector; and 4), inputting the fault feature vector calculated in the step 3) into a well trained neutral network and sort, so as to realize the state detection of the vacuum breaker.

Description

Technical field [0001] The invention relates to the technical field of vacuum circuit breakers, in particular to a method for detecting the mechanical state of a VS1 vacuum circuit breaker based on vibration signal analysis. Background technique [0002] The VS1 vacuum circuit breaker is a kind of high-voltage switch. The operating state of the high-voltage switch in the power grid is extremely important to the safe operation of the system. Condition detection is based on the actual operating conditions of the equipment to determine whether the equipment needs to be overhauled, and which parts and contents are overhauled, which is highly targeted. In high-voltage switch accidents, mechanical faults occupy the first place. Therefore, to realize the state detection of the VS1 vacuum circuit breaker, the mechanical state must be considered. The vibration signal during the closing and opening process contains a large amount of equipment mechanical state information. And easy to meas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/00G01H17/00
Inventor 牛博王森吕亮李志忠卢鹏宋政湘
Owner STATE GRID CORP OF CHINA
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