A fault analysis and detection method for cable accessories

Abstract

The invention discloses a fault analysis and detection method for cable accessories, comprising: collecting partial discharge signals generated when cable accessories fail; performing filtering and frequency division on the partial discharge signals; converting and analyzing by using HHT transform; extracting Partial discharge fault characteristic signal, establish a partial discharge fault characteristic database; identify the data information of the partial discharge fault characteristic database, establish the corresponding relationship between the fault characteristic and the fault type and degree; obtain the fault identification result. The method provided by the invention can not only detect whether partial discharge occurs in cable accessories, but also judge and identify the type and degree of fault defects by analyzing and collecting signals; moreover, the provided analysis results are comprehensive, complete and systematic, which improves the performance of cable accessories. The efficiency of fault analysis and detection helps to quickly eliminate faults and reduce losses caused by faults.

Description

technical field [0001] The invention relates to the technical field of cable accessory fault detection, in particular to a cable accessory fault analysis and detection method. Background technique [0002] With the wide application of cross-linked polyethylene (XLPE) power cables in power systems, the faults of XLPE cable running systems are becoming more and more significant. According to statistics, among the XLPE power cable operation accidents, the accidents caused by the failure of the cable accessories are as high as 75%. The cable accessories have become the weak link in the operation of the power system, so the detection and analysis of the failure of the cable accessories is particularly important. At present, there are many methods for fault analysis and detection of cable accessories at home and abroad, but most of the fault analysis and detection cannot be completed directly at the fault site, and the efficiency is low, resulting in continuous losses. In additio...

AI Technical Summary

Problems solved by technology

At present, there are many methods for fault analysis and detection of cable accessories at home and abroad, but most of the fault analysis and detection cannot be completed directly at the fault site, and the efficiency is low, resulting in continuous losses.

In addition, the current fault detection method can only detect whether there is a defect, but cannot realize the judgment of the type and size of the fault defect, the evaluation of the aging state of the cable accessories, and the estimation of the remaining life of the cable accessories, so it is impossible to propose a correct repair plan

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