Single Phase Fault Location in Distribution Networks Based on Charge Transients

Abstract

In this paper the one possibility of single phase fault location in unearthed MV distribution network is presented. This method is based on transients which appear in the case of charge redistribution in the instance of fault occurrence. The issues of fault location in distribution networks was emphasized through influence of inhomogeneity, distributed loads, considerable fault resistance and numerous branches on distribution feeders. On the extracted transients of currents and voltages of faulty phase, method based on solving differential equations is applied. The low frequency charge transients, with minimum sample frequency of several kHz is used. This method was examined by computer simulations on the modeled network as well as on the real network and fault. In the case of real fault, it was used data registered by power quality analyzer.