基于小波变换的全并联AT供电方式双端故障测距研究  

Study on Full Parallel AT Power Supply Mode Double-End Fault Location based on Wavelet Transform

作　　者：曹斌 CAO Bin

机构地区：[1]中国铁路郑州局集团有限公司郑州供电段

出　　处：《电气化铁道》2022年第2期59-65,70,共8页Electric Railway

基　　金：中国铁路郑州局集团有限公司“铁路接触网故障智能分析诊断装置研究与应用”(2021GD-8)。

摘　　要：本文提出了一种基于小波变换的全并联AT故障测距解决方案,针对高速铁路特殊的全并联AT供电运行模式,将行波故障测距装置分别安装于全并联AT上网线上,当全并联AT线路发生故障时,利用工频判定故障发生行别和相别,对故障测距装置的行波作出分析,将采集到的行波进行小波变换分析,可实现百米级误差的测量。全并联AT故障测距方案主要针对于带支路的全并联AT线路,其线路阻抗不均匀时,阻抗法故障测距精度更低。本文通过对不同故障距离、不同故障初相角、不同过渡电阻情况进行故障测距研究,基于小波变换的全并联AT故障测距方案均能表现出较好的适应性,其故障测距精度对于实际工程应用具有重要意义。The paper puts forward a solution scheme for fault location of full parallel AT power supply mode based on wavelet transform, with regard to the special full parallel AT power supply mode of high-speed railway, the traveling wave fault location devices are installed on the full parallel AT network line, when it is faulty, by application of power frequency to determine the line and phase of the fault, the traveling wave of the fault location device is analyzed, and the wavelet transform analysis of the collected traveling wave can be used to measure the 100-meter level error. The fault location scheme of full parallel AT power supply is mainly used for the line with branches, and when the line impedance is not uniform, the fault location accuracy is lower. Through the research on fault location under different fault distance, different fault initial phase angle and different transition resistance, the full parallel AT fault location scheme based on wavelet transform show good adaptability, and its fault location accuracy has great significance for practical engineering application.

关 键 词：全并联AT 故障测距方案 小波变换 故障验证 工程应用 

分 类 号：U226.8[交通运输工程—道路与铁道工程]