﻿ 基于支持向量机的单端行波故障测距方法

基于支持向量机的单端行波故障测距方法Single Terminal Traveling Wave Fault Location Method Based on SVM

Abstract: When single-phase-to-earth fault occurred in radial distribution network supplied by single power, the key problem of the single-ended traveling wave fault location lies in the correct recognition of the second travelling wave head to reach the measuring point. In view of the above problem, this paper introduces single terminal traveling wave fault location method based on SVM. After identifying the fault section by the SVM, the second traveling wave head coming from the fault point or bus at opposite terminal is recognized based on lattice diagram of traveling waves. Elec-tromagnetic coupling effect is eliminated by phase mode transformation. Through the study of relevant knowledge of wavelet transform, the optimal wavelet base is selected for wavelet trans-form in order to identify the fault traveling wave head. The time corresponding to fault traveling wave modulus maximum is detected and time difference of arrival and velocity of the corre-sponding wave head is used to achieve fault location.

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