Distribution line fault point location system and distribution line fault localization method

摘要

PROBLEM TO BE SOLVED: To provide a locating method and system for wiring failure point capable of specifying identifying the occurrence point of intermittent ground fault failure regardless of the wiring system and the ground fault conditions.;SOLUTION: A frequency that the voltage level is maximum of VFT in high frequency components observed at the most distant observation point PT from the power source end of the wiring is extracted as a standardization reference frequency. From the high frequency components observed at each observation point PS, P₁ and P₂ at the same time, voltages VFS, VF₁ and VF₂ corresponding frequencies to the standardization reference frequency are extracted. The cross point of a voltage line LT linearly approximating the voltages VF₂ and VFT of a plurality of observation points P₂ and PT in most end side from the ground fault point (t) with parameters of distances of each observation points PS, P₁ and P₂ and a voltage line LS linearly approximating the voltage VF₁ and VFS of a plurality of observation points P₁ and PS in power source side from the ground fault point (t) is specified as a ground fault point (t).;COPYRIGHT: (C)2003,JPO