电测与仪表Issue(12)：34-39,6.
基于小波能量谱的输电线路雷击故障识别方法研究
Identification Method of Lightning Fault for Transmission Lines Based on Wavelet Energy Spectrum
李晓斌 1赵东阳 1钟光强 1郑富春 1吴昊 2王琪 2姚成果 2王俊凯2
作者信息
- 1. 国网重庆市电力公司长寿供电分公司，重庆 401220
- 2. 重庆大学 输配电装备及系统安全与新技术国家重点实验室，重庆 400044
- 折叠
摘要
Abstract
Accurate identification of lightning fault is of great significance for improving the transmission line lightning protection design. In this paper,the three-phase travelling wave current is studied. Based on the wavelet energy spectrum, a lightning fault identification method is established. According to the distribution characteristics of the wavelet energy spectrum for different lightning faults,the corresponding characteristic and fault identification criterion are constructed. The simulation results show that,the method is not affected by parameters and waveforms of lightning current models. It can distinguish accurately the three fault types,which are shielding failure without flashover,shielding failure with flashover and back flashover. By choosing the threshold and setting the detection point reasonably,it can respectively avoid the effect of lightning impulse corona and reflected wave at the end of the line on the accuracy of the method. Therefore,the method has high practical value.关键词
输电线路/雷击故障/识别方法/小波能量谱Key words
transmission line/lightning fault/identification method/wavelet energy spectrum引用本文复制引用
李晓斌,赵东阳,钟光强,郑富春,吴昊,王琪,姚成果,王俊凯..基于小波能量谱的输电线路雷击故障识别方法研究[J].电测与仪表,2014,(12):34-39,6.
