基于多小波的煤矿井下动力电缆故障定位研究

Research of fault location of underground power cable based on multi-wavelet

针对基于传统小波变换的煤矿井下动力电缆故障定位方法由于小波函数不具有对称性而存在定位精度差的问题,提出了一种基于GHM多小波的煤矿井下动力电缆故障定位方法。分析了多小波理论的原理,详细介绍了GHM多小波在煤矿井下动力电缆故障定位中的应用。仿真结果表明,动力电缆故障电流信号经GHM多小波变换后各尺度的奇异点不会发生偏移,提高了故障定位精度。

In view of problem of low location precision in fault location method of underground power cable based on traditional wavelet transform caused by asymmetry of wavelet function, the paper proposed a fault location method of underground power cable based on GHM multi-wavelet. It analyzed principle of multi-wavelet theory, and introduced application of the GHM multi-wavelet in fault location of underground power cable. The simulation result shows that singular points of each scale cannot occur migration after signal of fault current of power cable is transformed by the GHM multi-wavelet, which improves precision of fault location.