摘要
研究了基于小波分解的故障测距,对故障行波电流信号进行相模变换,通过小波分解提取出故障分量发生奇异性的时间点,针对以往利用单端行波故障测距存在故障距离检测不准确的问题,采用双端故障测距将行波到达两端的时间相减,可以更准确地定位故障点。实例分析表明该方法有很高的测距精度。
This paper makes a research of fault location based on the wavelet decomposition,analyzing the fault traveling-wave current signal by phase-mode transformation,and then extracting the time spot of singular signal of fault component by wavelet decomposition.In view of the inaccurate fault location by conventional single-terminal traveling-wave method,double-terminal method that subtracts the time of traveling wave＇s arrival at both ends enables more accurate fault location.The simulation results show that this method has great fault location accuracy.
出处
《广东电力》
2010年第11期10-13,共4页
Guangdong Electric Power
关键词
行波
小波分解
波头检测
双端故障测距
traveling wave
wavelet decomposition
wave head detection
double-terminal fault location
