Coordination of Directional Overcurrent Relays in the Interconnected Power Systems using Soft Computing Technique

Abstract

Coordination of directional overcurrent relays in a multiloop subtransmission or distribution network is formulated as an optimization problem. The coordination of directional overcurrent relays is formulated as a mixed-integer nonlinear programming problem and is then solved by a new seeker optimization technique. Based on the act of human searching, in the proposed seeker technique, the search direction and step length are determined in an adaptive way. The proposed method is implemented in three different test cases. The results are compared with proposed analytic and evolutionary approaches.