Abstract

In this paper distributed parameters based a novel algorithm for finding location of fault in long transmission line is presented. Presently relay manufacturers use impedance based algorithm considering the lumped parameters even for long transmission line. Lumped parameters based gives accurate results for short transmission line, but fails to produce good accuracy in long transmission lines. This paper draws the attention of manufacturer to use distributed parameters based algorithm in long transmission line to get correct location of fault. A mathematical model is developed for proposed technique and a simulation model is developed for proposed fault locator in MATLAB for short and long transmission line. Simulation results are validated from actual field results and the results obtained from two different make relays.

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