Method and system for adaptive optimization of cable fault detection waveform

A technology for detecting waveform and cable faults, applied in the fault location, detecting faults by conductor type, measuring electricity, etc., which can solve the problem that multiple fault points are not easy to distinguish.

Pending Publication Date: 2022-06-24
POWER RES INST OF STATE GRID SHAANXI ELECTRIC POWER CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

The method of the present invention uses wavelet transform to carry out self-adaptive optimization processing on diagnostic waveform data, which can solve the technical problem that multiple fault points are not easy to distinguish due to interference points

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  • Method and system for adaptive optimization of cable fault detection waveform
  • Method and system for adaptive optimization of cable fault detection waveform
  • Method and system for adaptive optimization of cable fault detection waveform

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Embodiment Construction

[0037] In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Embodiments are part of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] It should be noted that the terms "first", "second" and the like in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used may be interchanged under appro...

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Abstract

The invention discloses a cable fault detection waveform adaptive optimization method and system, and the method comprises the following steps: obtaining a diagnosis waveform of a cable to be subjected to fault detection, and carrying out the one-layer wavelet decomposition to obtain a first-layer detail coefficient; selecting the wavelet basis with the maximum peak-effect ratio as the optimal wavelet basis; performing K-layer wavelet decomposition on the diagnosis waveform; according to the detail coefficient of the Kth layer, detail energy is obtained through calculation, the detail energy of the Kth layer and the detail energy of the (K-1) th layer are quotient, and the maximum quotient value is taken as the critical layer number; comparing the detail energy of the previous layer or the previous two layers of the critical layer number, and taking the larger value as the optimal wavelet layer number; and performing wavelet threshold de-noising processing on the diagnosis waveform to obtain a self-adaptive optimization result. According to the method, the technical problem that a plurality of fault points are difficult to distinguish due to interference points can be solved.

Description

technical field [0001] The invention belongs to the technical field of cable fault detection, in particular to the field of cable fault detection waveform optimization, and in particular to a method and system for adaptive optimization of cable fault detection waveforms. Background technique [0002] Cables play a very critical role in the power transmission of power systems; once a cable fault occurs during operation, it will lead to outage or even loss of control of large electrical systems, resulting in serious economic losses and social impacts. Therefore, it is very important to diagnose the local defects of the cable, which can eliminate the local defects of the cable in time and avoid the permanent failure caused by the local latent defects. [0003] The current cable fault detection methods mainly include: direct measurement of the physical and chemical properties of the cable for detection, measurement of the relevant electrical quantities of the cable, etc.; howeve...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/083G01R31/088
Inventor 段玮赵学风蒲路林涛琚泽立侯喆孙浩飞高健王辰曦
Owner POWER RES INST OF STATE GRID SHAANXI ELECTRIC POWER CO LTD
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