基于多重小波变换的输电线行波故障测距  

Traveling Wave Fault Location Algorithm on Transmission Line Based on Multi-wavelet Transform

作　　者：王显平[1] 黄益华[1] 唐昆明 

机构地区：[1]重庆电力高等专科学校,重庆400053 [2]重庆新世纪电气有限公司,重庆400041

出　　处：《中国农村水利水电》2009年第5期112-115,共4页China Rural Water and Hydropower

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.

关 键 词：小波变换 行波 故障测距 单端法 多端信息 

分 类 号：TM77[电气工程—电力系统及自动化]