Breaker on-off travel-time waveform preprocessing method and device

A pre-processing device, opening and closing technology, applied in circuit breaker testing and other directions, can solve problems such as unsatisfactory filtering effect

Active Publication Date: 2014-03-26
XJ ELECTRIC +2
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to provide a travel-time waveform preprocessing method and device for circuit breaker opening and closing, to solve the problem that the effect of existing filtering and other preprocessing methods is not ideal

Method used

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  • Breaker on-off travel-time waveform preprocessing method and device
  • Breaker on-off travel-time waveform preprocessing method and device
  • Breaker on-off travel-time waveform preprocessing method and device

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Embodiment Construction

[0026] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0027] The stroke-time waveform preprocessing method when the circuit breaker opens and closes should include at least the first fitting process. The following implementation is a preferred embodiment, which includes two fitting processes. The whole process will be described in detail below.

[0028] Such as image 3 As shown, the first step is to use the collector to sample the opening and closing waveform of the circuit breaker to obtain a series of sampling points (t1, x1), (t2, x2), ..., (tn, xn).

[0029] In the second step, the value of each sampling point and the sampling time are used to derive the waveform in each sampling period, λ k =(x k+1 -x k ) / sampling period, the obtained derivatives are (λ1, λ2, ..., λn-1); at this time, the derivative value obtained in the k-th sampling period is λk, and m derivatives are reserved before the k-th sampling...

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Abstract

The invention relates to a breaker on-off travel-time waveform preprocessing method and device. A brand new on-off travel-time feature curve preprocessing method is provided. The travel-time feature data collected on site is fitted by at least one method so as to remove defective pixel and outlier, and accurate basis is provided for subsequent accurate distinguishing of high-voltage switch faults using on-off waveforms.

Description

technical field [0001] The invention relates to a method for preprocessing stroke-time waveforms during opening and closing of a circuit breaker. Background technique [0002] 80% of high-voltage circuit breaker failures are caused by poor mechanical characteristics, and most of the failures are operating mechanism problems. It is of great practical significance to strengthen the on-line monitoring of the mechanical characteristics of high-voltage circuit breakers to ensure the safe operation of high-voltage circuit breakers. Among them, the stroke-time characteristics of the circuit breaker when opening and closing (such as figure 1 , 2 (shown) is an important parameter to characterize the mechanical characteristics of the circuit breaker, and is also the basis for calculating the opening and closing speed of the circuit breaker. After the waveform curve is obtained, the waveform can be analyzed to determine whether the state of the circuit breaker mechanism at the corres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327
Inventor 梁经宛路光辉陈新美马仪成焦坡雍明超赵宝牧继清
Owner XJ ELECTRIC
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