计及负荷分级与孤岛运行的配电网供电恢复策略

针对现有的配电网供电恢复策略都没有考虑重要负荷的优先恢复供电,以非故障失电区域的一级负荷的有功负荷作为制定划分孤岛范围与初始恢复方案的依据,通过判断分布式电源容量与可转供线路容量之间的关系,确定孤岛范围,达到孤岛范围内与孤岛范围外负荷的最大恢复。在确定孤岛范围之后,采用广度搜索算法计算供电邻接表,确定一级负荷的供电恢复策略,再使用匈牙利算法确定非故障区的二、三级负荷供电,避免重要负荷在故障恢复决策中误切除的可能,算例分析验证了算法的可行性。

Service Restoration of Distribution with Load Classification and Distributed Generation

In view of the conventional distribution system service restoration failing to consider the condition of important load, an improved smart distribution system restoration service, which includes DG islanding technique and bases on the relationship between supporting feeders and the active load of the failure one-level nodes, is proposed. First, when determining area of the DG islanding, the strategy proposed in this paper refers the relationship between the supporting feeders and the capacity of the DG, then using breadth-first search method to find the optimal DG islanding plan. Second an improved bread-first search algorithm is used to establish the power supply adjacency, and determines the service restoration for the failure one-level nodes, then The Hungarian algorithm is used to determine the service restoration for the failure second-level nodes and the failure third-level nodes. Analysis of case study verifies the feasibility of the proposed algorithm.