Wavelet transform based fault detector for protection of series capacitor compensated three phase transmission line

Abstract

This paper proposes wavelet transform based fault detector for the protection of series capacitor compensated three phase transmission line. Three phase current measured at the relay location of a transmission line is processed using wavelet transform with daubechies-4 mother wavelet. Numerous fault situations are studied to check the performance of the proposed fault detector. To assess the performance of proposed fault detector, various fault parameters such as fault inception time, fault resistance, fault location, fault type and ground resistance are varied. Simulation results exemplify the accurateness and effectiveness of the proposed fault detector.Keywords: Wavelet transform, series compensated transmission line protection and fault detection