PARAMETER FREE TRAVELING WAVE BASED FAULT LOCATION FOR POWER TRANSMISSION LINES

摘要

The invention provides a method and device for fault location in a power transmission line. The method comprises obtaining (202) arrival times of first and second peaks of travelling waves detected at a first terminal and a second terminal of the power transmission line. The method also comprises identifying (204, 206) 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 arrival times of the travelling wave detected from measurements at the first terminal with the arrival times of the travelling wave detected from measurements at the second terminal. Accordingly, the fault location is estimated (208, 210, 212) with the arrival times of the first and second peaks of the corresponding travelling waves, and the length of the power transmission line.