Research on Fault Location of Power Cable with Wavelet Analysis

This article researches for 10kV transmission cable form the ground substation to the underground central substation in the coal mine. The transient traveling wave signal of the cable fault is disposed by the wavelet transformation based on the cable traveling wave transmission theory. The traveling wave head of the cable fault can be more accurately extracted after the wavelet transform. The corresponding sample point can be found out, and then the time of the wave head reached the detection point can be accurately calculated by sampling. In the end, the fault distance can be calculated by using the one-port fault location method. The ranging accuracy is improved by this method.