Optimal Coordination Of Directional Overcurrent Relays Using Various Metaheuristic Methods

In this paper, various metaheuristic optimization algorithms are proposed and successfully adapted to solve the coordination problem of directional overcurrent relays (DOCRs). The proposed algorithms are artificial bee algorithm (ABC), biogeography-based optimization (BBO), firefly algorithm (FA), and bee algorithm (BA). The main object of coordination of DOCRs is to improve the total operating time of all primary relays without violation of security constraints to main security and service continuity of the practical power systems. The particularity and robustness of various metaheuristic algorithms have been validated on 8 bus interconnected electric system. The results prove the viability of the metaheuristic methods in particular the BBO and FA in solving such non-linear problems related to power system protection coordination.