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.
出处
《中国电机工程学报》
EI
CSCD
北大核心
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
关键词
输电线路
故障测距
暂态电流行波
高压输电线路
transmission line
transient current travelling waves
fault location
dyadic wavelete transform
