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Accurate fault location algorithm on power transmission lines with use of two-end unsynchronized measurements

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Author(s): Mohamed Dine | Houari Sayah | Tahar Bouthiba

Journal: Serbian Journal of Electrical Engineering
ISSN 1451-4869

Volume: 9;
Issue: 2;
Start page: 189;
Date: 2012;
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Keywords: fault location | unsynchronized measurements | communication | MATLAB

ABSTRACT
This paper presents a new approach to fault location on power transmission lines. This approach uses two-end unsynchronised measurements of the line and benefits from the advantages of digital technology and numerical relaying, which are available today and can easily be applied for off-line analysis. The approach is to modify the apparent impedance method using a very simple first-order formula. The new method is independent of fault resistance, source impedances and pre-fault currents. In addition, the data volume communicated between relays is sufficiently small enough to be transmitted easily using a digital protection channel. The proposed approach is tested via digital simulation using MATLand the applied test results corroborate the superior performance of the proposed approach.

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