New Accurate Fault Location Algorithm for Parallel Lines

Varieties of fault location algorithms, differing in many aspects, have been developed so far. Huge majority of them, including the algorithm presented in this paper, belongs to the family of impedance based algorithms. In these algorithms the impedance parameters of a line are taken as the measure for a distance to fault. Basically, voltages and currents from one end or from all terminals of a line are the inputs of such the algorithms. The other possibility relies on using measurements of distance relays from the line terminals as Sachdev and Agarwal (1) proposed. Travelling waves based fault location, as for example in the representative method by Gale et al (2), constitutes yet another family of algorithms.