分布式配电网连锁故障快速自愈控制方法

Fast self⁃healing control method for cascading faults in distributed distribution networks

研究分布式配电网连锁故障快速自愈控制方法,通过计算故障前后各条线路的有向电气介数,确定分布式配电网连锁故障脆弱线路集合,采用基于图论的Warshall-Floyd算法确定电能传输的主要线路集合,实现连锁故障薄弱环节定位,采用组合赋权方式计算薄弱环节各节点重要度,在满足各约束条件下构建孤岛,实现分布式配电网的自愈控制。实验结果表明,该方法可有效识别出分布式配电网连锁故障中的薄弱线路集合;并通过构建4个孤岛实现故障区域的隔离,确保关键负荷的电力持续供应,达到快速自愈的目的。

Research on fast self-healing control methods for cascading faults in distributed distribution networks.By calculating the directed electrical betweenness of each line before and after the fault,the vulnerable line set of cascading faults in the distributed distribution network is determined.The Warshall-Floyd algorithm based on graph theory is used to determine the main line set for energy transmission,and to locate the weak links of cascading faults.The importance of each node in the weak links is calculated using a combination weighting method,and isolated islands are constructed under various constraint conditions to achieve self-healing control of the distributed distribution network.The experimental results show that this method can effectively identify weak line sets in distributed distribution network cascading faults;And by constructing four islands to isolate the fault area,ensure the continuous supply of power to critical loads,and achieve the goal of rapid self-healing.