volume 4, issue 4, P2032-2041 1989
DOI: 10.1109/61.35628
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K.S. Prakash, O.P. Malik, G.S. Hope

Abstract: A high speed directional comparison relay based on the evaluation of the locally measured deviations of the voltage and the phase shifted current from their prefault values is described in this paper. The operation of the relay depends on the power frequency components of the voltage and phase shifted current deviation signals. The direction to a fault is determined by an amplitude comparator technique which compares a discriminant value with a positive or negative threshold. Simulation studies on a three-pha…

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