Stepwise optimal based islanding algorithm for active distribution network
Islanding operation is a solution to reduce outage area and enhance the reliability of power supply in distribution network during fault processing. With the interconnection of different kinds of distributed energy sources (DERs), how to separate the islands properly within the objectives and constraints has been an area of research focus. To address this issue, model of energy resource output and method of regional load priority index calculation are established, and a stepwise optimal algorithm for islanding separation is proposed in this paper. The priority of load and the restriction of power supply are analyzed in each step. Case study shows the algorithm can form a bigger island while keeping essential load.