Application of PSO for optimal coordination of directional over-current Relays in distribution system with distributed renewable energy sources

lazhar Bougouffa, Abdelaziz Chaghi


Applications of Distributed Renewable Energy Sources (D-RES) in distribution system are increasing rapidly. But, integration of these renewable energy resources into distribution systems results in more problems in protection related issues such as mis-coordination, and changes the direction of fault currents. The coordination of Directional Over-Current Relays (DOCRs) is a very critical task for appropriate functioning of the electrical power system in presence of D-RES. In this paper, a Particle Swarm Optimization (PSO) algorithm has been presented to determine the operating time of each relay depends on two independent variables called Pickup current (Ip) and Time Dial Setting (TDS). From the result of analysis, the impacts of RES location in the distribution system on DOCRs had been observed on the optimal relays settings


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