Optimal Relay Coordination and optimization in Distributed generation based Power System

Due to the switchover in the operation pattern from grid-connected position to the islanded one, there is a considerable and frequent fluctuation with respect to short current position in the microgrid. As a result, this observed change in the network will have an impact on the over current scheme. Further, there will be a delay in the over current relay (OCR) operational time or perhaps a failure to isolate problems inside the microgrid. In this study, optimization of the Time Multiplier Setting (TMS) of the over-current relay is carried out in order to tackle the problem of coordination of OCRs. The undesirable industrial relay limitations and restrictions are also articulated as optimization constraints in this study. Particle Swarm Optimization(PSO) is used to compare the outcomes of the given optimization strategy. With the IEC Microgrid Benchmark, the suggested approach’s efficacy and potency are evaluated. The model-750/760 over-current relay from GE- Multilin is used in ETAP to verify the results.