Low-voltage DC Cable Fault Location Method Based on Improved Empirical Wavelet Transform
To improve the accuracy of low-voltage DC cable location,an improved empirical wavelet transform(IEWT)method and an improved double-end traveling wave criterion method are proposed.This method first uses the double-end traveling wave method to obtain the current signals at both ends of the faulty cable,and then decomposes and reconstructs the current signal through IEWT to obtain processed intrinsic mode function(IMF)components,which are screened to effectively avoid mode mixing in the decomposition of complex noise signals.Finally,the selected IMF components are detected using kurtosis rules,and the position of the fault point is determined by using the improved double-end traveling wave fault criterion.Simulation results show that this method has high accuracy and meets the requirements of engineering practice for location.
low voltage DC power cablefault locationdouble-ended traveling waveimproved empirical wavelet transformkurtosis
万方数据
维普
