A new technique using wavelet analysis for fault location

A new technique employing wavelet transform (WT) is proposed for fault location. Dyadic wavelet analysis is implemented by way of the multiresolution filter banks. A six-level filter bank is constructed to abstract the fundamental frequency voltage and current signals from the faulted transmission line. Fault location is then calculated using the clean sinusoidal waveform obtained. Fault simulations are performed using EMTP, and results demonstrated the WT method is more accurate as compared to the Fourier transform (FT)