基于小波变换的高压输电线路故障分析

岳云涛 计赛阁（北京建筑大学电气与信息工程学院，北京市 100044）

李炳华（悉地（北京）国际建筑设计顾问有限公司，北京市 100013）

李若凡 王炳铮（北京建筑大学电气与信息工程学院，北京市 100044）

Fault Analysis of High‑voltage Transmission Line Based on Wavelet Transform

YUE Yuntao JI Saige(College of Electricity Engineering and Information Engineering,

Beijing University of Civil Engineering and Architecture,Beijing 100044，China)

LI Binghua(CCDI Group（Beijing）,Beijing 100013，China)

LI Ruofan WANG Bingzheng(College of Electricity Engineering and Information,

Beijing University of Civil Engineering and Architecture,Beijing 100044，China)

Abstract：For the problem of difficult fault detection of high‑voltage transmission line,the single terminal method of traveling wave is organically combined with wavelet transform to obtain the accurate distance of the fault point in the front and rear half sections of the line,and then the specific fault point location is judged by the double terminal method. This method with effectiveness and practicability verified by the system simulation model reduces the error influence caused by line length,fault time and on‑site noise of transmission line.

Key words：fault analysis;high‑voltage transmission line;wavelet transform;traveling wave distance measuring;threshold denoising;system simulation;validity;practicability

摘　要：针对高压输电线路故障检测困难的问题，采用单端行波测距法和小波变换的有机结合，获得故障点发生在线路前后两个半段的精确距离，再由双端法判断具体故障点位置。该方法降低了因线路长度、故障时间、输电线路现场噪音带来的误差影响，系统仿真模型验证了该方法的有效性和实用性。

关键词：故障分析；高压输电线路；小波变换；行波测距；阈值去噪；系统仿真；有效性；实用性

中图分类号：TM726     　　  　   文献标识码：A

doi：10.3969 / j. issn.1003 － 8493.2021.11.012