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1. (WO2018122627) TRAVELLING WAVE BASED METHOD FOR LOCATING A FAULT IN A TRANSMISSION LINE AND DEVICE THEREFOR

Pub. No.:    WO/2018/122627    International Application No.:    PCT/IB2017/052270
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Fri Apr 21 01:59:59 CEST 2017
IPC: G01R 31/08
Applicants: ABB SCHWEIZ AG
Inventors: NAIDU, Obbalareddi Demudu
GEORGE, Neethu
SRIVASTAVA, Sachin
Title: TRAVELLING WAVE BASED METHOD FOR LOCATING A FAULT IN A TRANSMISSION LINE AND DEVICE THEREFOR
Abstract:
The invention provides an Intelligent Electronic Device (IED) and a method for locating a fault in a power transmission line with the IED. The method comprises measuring arrival times of a first, second and third peak of a travelling wave, using measurements obtained with one or more measurement equipment connected with the power transmission line. The method further comprises generating two or more initial estimates for the location of the fault, estimating time of initiation of the travelling wave, and estimating an arrival time of the third peak. The estimated arrival time of the third peak is compared with the measured arrival time of the third peak, to select an initial estimate of the two or more initial estimates as the location of the fault.