基于水循环算法的配电网故障区段定位方法

Fault Section Location Approach of Distribution Networks Based on Water Cycle Algorithm

快速准确的故障区段定位对恢复配电网供电及缩短用户停电时间至关重要。分布式电源的接入使得以往功率单向流动的配电网转变为复杂的有源配电网,也给故障区段定位增加了困难。针对智能算法定位速度较慢、寻优存在局限性的问题,提出一种基于水循环算法的配电网故障区段定位方法。对各线路区段及各节点所配置终端的反馈信息进行刻画,根据上下游节点信息的逻辑性对故障电流信息进行容错处理,修正可识别的畸变信息。使用水循环算法进行寻优求解,锁定故障线路区段。最后,利用不同配网系统测试算例验证了所提方法的优越性。

Fast and accurate fault section location is crucial to restoring electric supply of distribution networks and reducing the duration of outage.The access of distributed generation transforms the previous distribution networks with unidirectional power flow into complex active distribution networks,which also brings challenges to fault location.To solve the problem that intelligent algorithms have lower speed of fault location and the limitations of optimization,a fault section location approach of distribution networks based on water cycle algorithm is put forward.The feedback informa-tion from each terminal is depicted.The fault current information is processed according to the logic of the upstream and downstream node information,and identifiable abnormal information is corrected.The water cycle algorithm is used to complete the optimization and figure out the faulted line section.Finally,the tests of different distribution networks veri-fy the superiority of the proposed approach.