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The time of operation of overcurrent relays (OCRs) can be reduced, and at the same time, the coordination can be maintained, by selecting the optimum values of time multiplier setting (TMS) and plug setting (PS) of OCRs. This paper presents hybrid genetic algorithm (GA) - nonlinear programming (NLP) approach for determination of optimum values of TMS and PS of OCRs. GA has a drawback of, sometimes,...
We present a new algorithm of reduction of coordination constraints effect on relayspsila operating times by optimal choice of pickup currents using linear programming. Consequently, significant minimization of time multiplier settings was achieved. This algorithm was tested on the 8-bus system and IEEE 14-bus network. Its efficiency was investigated on a coordination problem solved in three different...
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