Comprehensive Performance Analysis of Greywolf Optimizer for Overcurrent Relay Coordination

In power systems, the practice of overcurrent protection is more economical and common than the distance protection practice. In addition, overcurrent protection is used in the majority of distribution networks. This makes it necessary to design the coordination of overcurrent relays used in distribution networks in the most appropriate way. Otherwise, the relays cannot work as desired during the fault. In order for the coordination between the overcurrent relays to be effective and selective, the relay setting parameters must be adjusted depending on the network. With the expansion of distribution networks, it has become difficult to calculate or update the relay settings. For this reason, overcurrent relay coordination is designed as an optimization problem with a high number of constraints. At the point of solving the optimization problem, many meta-heuristic algorithms have been developed. In this study, the Greywolf Optimization Algorithm (GWO) for the IEEE 8 Bus test network has been successfully applied and comprehensive performance analysis has been carried out.