Coordination of Directional Overcurrent Relay Using PSO-DE Algorithm

A power system network has dynamic and complex characteristics. The continuity of electricity supply to customer side from the generation in stable, secure, and reliable is being a top priority to be considered. Preserving an operation of a power system on its operating point depends on its protection system scheme. Furthermore, carrying out the protection system requires a relay setting that can coordinate to carry out security. However, calculating the time dial setting (TDS) and the pickup current on each relay for practical work in industry is more difficult, complex, and takes a long time. In this paper, the directional overcurrent relay (DOCR) protection is coordinated by using hybrid particle swarm optimization - differential evolution (PSO-DE) algorithm. The proposed method is to minimize the TDS time and operating time of the relays by satisfying the protection coordination requirements. The simulation results showed that the total operating time and TMS using PSO-DE have faster operating times and TDS than other optimization algorithms.