TRAVELING WAVE BASED FAULT LOCATION USING UNSYNCHRONIZED MEASUREMENTS FOR TRANSMISSION LINES

摘要

The invention provides a method for fault location in a power transmission line. The method comprises obtaining (802) a plurality of parameters associated with travelling waves detected from measurements carried out at a first and second terminal. The plurality of parameters comprises arrival times of first and second peaks of the corresponding travelling waves, and rise times of the corresponding first peaks. The method also comprises identifying (804, 808) one of a first half, a second half, and a mid-point of the power transmission line, as having the fault, based on a comparison of the rise times. Accordingly, the fault location is estimated (806, 810, 812) with one or more of the arrival times of the first and second peaks of the corresponding travelling waves, propagation velocity of the travelling wave and line length.