摘要： 输电线路发生故障后的信号是一个突变的、具有奇异性的暂态信号，包含着丰富的故障信息。输电线路的破坏多半是由短路故障引起的，通过分析短路故障，采用提升小波对故障后的电流进行检测。该文依据实际电力系统输电线路进行短路故障实例仿真，仿真结果表明，提升小波不但能有效地检测输电线路短路故障信号的奇异点，而且比db5小波快3 ms，从而为下一步故障测距提供有利依据。

关键词: 提升小波, 输电线路, 短路故障, 检测

Abstract: The transient signal is abrupt and singular after transmission line faults occur. And the signal contains abundant fault information. The transmission line damage is mostly caused by short-circuited fault. The short-circuited fault is analyzed and then the fault current is detected using lifting wavelet. According to the actual power system transmission line, short-circuited fault simulation is set up. The simulation results show that lifting wavelet not only effectively detects the signal singularity of transmission line short-circuited fault but also runs 3 ms(millisecond) faster than db5 wavelet, which provides support for next fault location.

Key words: lifting wavelet, transmission line, short-circuited fault, detection

中图分类号: 

• TP391