基于双向邻接路径和多支路断开的快速潮流转移识别

Fast Power Flow Transferring Based on Bidirectional Adjacent Path and Multi-branch Disconnection

为了加快输电断面搜索速度,提出了一种基于双向邻接路径的输电断面搜索方法.利用双向邻接路径算法搜索前K最短路径,对K的取值进行优化.基于叠加定理分析多支路断开情况下的潮流转移特点,并推导在多支路断开情况下线路功率变化量的表达式,估算潮流转移后线路的功率.定义并结合危险系数选取危险线路集.New England 39节点系统的仿真结果表明,此方法有效避免线路漏选,并适用于多支路断开情况,无需对全网进行计算分析,减小了大量的计算量,满足搜索的快速性和全面性,为过负荷控制做充分准备,对预防连锁跳闸事故的发生意义重大.

In order to speed up transmission section search speed,a algorithm for searching transmission section based on bidirectional adjacent path was given in the paper.The method show system network diagram by weighted adjacent matrix,searching for the first k shortest paths based on bidirectional adjacent path,optimize the value of k.Analyzing power flow transfer in the case of multi-branch disconnection based on superposition theorem,deducing the expression of line power variation in case of multi-branch disconnection.Define and combine danger factor,seleted dangerous line set.New England 39 node system simulation results shows,this method can effectively avoid line leakage and be suitable for multi-branch disconnection,don't need to analyze the whole network,reduce the amount of calculation,satisfying the rapidity and comprehensiveness of the search,add full preparation for overload control.To prevent the occurrence of chain tripping accidents is of great significance.