Verification of fault location by TDR measurement on an actual line including multiple ground-mounted equipment

Currently, as a method of identifying fault location on a distribution line, Time Domain Reflectometry (TDR) measurement has been studied. In this study, the fault part is identified by injecting a pulse wave into the distribution line, measuring the reflected wave at the fault point, and comparing the difference between the waveforms before and after the fault. A Previous studies have shown that TDR measurements can be applied to overhead distribution system[1,2]. This paper reports that the fault location by TDR measurement using pulse waves is effective for the underground distribution system as well as the overhead distribution system, with verification on an actual line including multiple ground-mounted equipment.