Single-Ended Fault Location for Hybrid Feeders Based on Characteristic Distribution of Traveling Wave Along a Line

Abstract

In terms of single-ended fault location for hybrid distribution lines, the most significant challenge is in the identification of the fault section and reflected wave from the fault point. Based on this, in this paper we introduce a new fault- section-location identification scheme for hybrid distribution feeders with only single-ended measurement. With the prior morphological spectrum-based fault-section identification technique, a location function is then built by the forward and backward traveling-wave components to describe the characteristic distribution of the traveling wave along the line. With the application of two-dimensional information (which is about time and space) of the traveling wave, it is simpler to locate the actual point of failure. The proposed scheme is investigated under different fault locations, fault resistances, sampling rates, fault inception angles, fault types, etc. The influences of immeasurable voltage traveling wave, adjacent sound lines, and measurable joint point are also investigated. Simulation results confirm the feasibility of the fault-location scheme for all test cases.