摘要
行波色散和反射行波的影响是导致行波测距不准确的主要因素。针对行波特点利用不同小波基特性的互补对线模行波进行多重多尺度的综合分析,对行波色散有一定的抑制作用,有效提取故障行波特征,同时提出了如何合理应用小波变换。再利用线路单端法测距结果综合判断消除了误辨反射行波对测距可靠性的影响,提出利用多重小波变换的行波测距法。通过仿真验证了上述方法在各种情况下有效提高了的测距的可靠性和准确度。
The fault location is disturbed by traveling wave dispersion and reflects wave mainly. Various wave speeds caused by traveling wave dispersion influence the fault location algorithm based on traveling wave inaccurately. It is avoided to a certain extent by analyzing line mode waves with multi-wavelet transform on multi-scale for complementarities of different wavelet bases. And characters of traveling waves are extracted by the analyses clearly. According to the above factors, it is found how wavelet transform is used in the way needed in different fields. In addition, the failure to locate the time when waves reflect is eliminated by analyzing the results of both terminals. So the algorithm is proposed to improve fault location reliably and accurately. The simulation result shows it is feasible.
出处
《中国农村水利水电》
北大核心
2009年第5期112-115,共4页
China Rural Water and Hydropower
关键词
小波变换
行波
故障测距
单端法
多端信息
wavelet transform
traveling wave
fault location
one terminal
multi-terminal information
作者简介
王显平（1952-），男，副教授，主要从事电力系统继电保护及自动化的教学与研究。
