利用暂态电流行波的输电线路故障测距研究  

RESEARCH OF FAULT LOCATION BASED ON CURRENT TRAVELLING WAVES

作　　者：董新洲[1] 葛耀中[2] 徐丙垠[3] 

机构地区：[1]天津大学电力系 [2]西安交通大学电气系 [3]科汇电气公司

出　　处：《中国电机工程学报》1999年第4期76-80,共5页Proceedings of the CSEE

基　　金：国家教委博士点基金;中国博士后科学基金

摘　　要：高压输电线路发生故障后的暂态电流行波中包含故障距离信息，它可用于实现精确故障测距。利用电流行波实现测距存在的问题是：电流行波无方向性，可能造成测距失败。针对这个问题，提出了基于小波变换模极大值的波形比较法。同时提出了行波测距的新算法——小波变换法。ＥＭＴＰ仿真结果表明：文中所提理论和方法对于实现利用电流行波的故障测距是正确的和有效的。There are fault distance information in the transient current travelling waves as high voltage transmission line. According to the information, the precise fault distance can be calculated. Its main problem is that current travelling waves haven ′t directionality. As results, fault location would be ‘failure’ some time. At the problem, ‘method of waveform comparison’ based on wavelet transform is proposed in this paper. At the same time, a new algorithm ‘wavelet transform’ is proposed. Result of EMTP simulation shows that the theory and the methods proposed in this paper are correct.

关 键 词：输电线路 故障测距 暂态电流行波 高压输电线路 

分 类 号：TM855[电气工程—高电压与绝缘技术] TM711