Optimal location, size and protection coordination of distributed generation in distribution network

Connection of distributed generation resources in distribution system enhances the availability and reliability of electric power during peak load. However, increasing penetration of distributed generation resources causes protection coordination failure in distribution system. An optimization problem is proposed to determine relay coordination under maximum penetration level of distributed generation by optimally selecting location, parameters and size of distributed generation. The proposed optimization problem is implemented on IEEE 15 node radial system. A meta-heuristic approach based on covariance matrix adaptation evolution strategy directed target to best perturbation algorithm is applied for optimization of relay coordination problem under maximum penetration of distributed generation.