Mitigation of voltage sag using feeder transfer in power distribution system

This paper presents a mitigation method of voltage sag using feeder transfer in power distribution systems. The proposed method is carried out using the switching for the sectionalizing points of distribution networks. It consists of two main sequences. First, the authors find the weakness points for voltage sags. Second, they transfer the customers of weakness points to other sources during the fault current's existence. A reliability evaluation using a risk assessment model of voltage sagging was performed for case studies. The Monte Carlo method and the historical reliability data of KEPCC (Korea Electric Power Corporation) were used for simulations.