%0 Conference Proceedings %T Optimal Coordination of Directional Overcurrent Relays in a Microgrid System Using a Hybrid Particle Swarm Optimization %A Damchi, Yaser %A Rajabi Mashhadi, Habib %A Sadeh, Javad %A Bashir, Mohsen %J 2011The International Conference on Advanced Power System Automation and Protection %D 2011