基于源流路径剖分的输电断面快速搜索

Fast search of transmission section based on path split between sources and flows

过载支路切除引起大规模潮流转移是导致连锁故障的重要原因。为快速、准确和全面地搜索到受潮流转移影响较大的线路构成的输电断面,提出了一种基于源流路径剖分的输电断面快速搜索算法。该算法首先根据实际电网结构利用图论知识生成有向图,建立送端节点-送电支路邻接表,快速生成源流路径树,逐步搜索有效源流路径链,最后计算所有有效源流路径链中所包含支路的开断分布因子,识别出受潮流转移影响较大的线路。所提算法无需进行全网拓扑搜索,无大规模矩阵运算,因此算法简便,搜索快速。对IEEE39节点系统进行仿真分析,其结果证明了所提算法的快速性与正确性。

Large-scale power flow transferring caused by overload lines removal is an important reason for cascading overload trips. For obtaining transmission section consisting of the lines that affected largely by the power flow transferring, this paper proposes a fast search algorithm about transmission section based on path split between sources and flows. Firstly, the algorithm transforms the actual grid structure into a directed graph using graph theory, then establishes the sending end node-power transmission branch adjacent table and quickly generates path trees of sources and flows. Breaking distributed factors of the branches included in all the effective path chains between sources and flows are calculated. The lines that largely affected by the power flow transferring are identified. This algorithm needn’t search for entire network topology and doesn’t contain any large mass matrix operations, so it is efficient. Finally, the simulation results of IEEE 39 nodes prove the rapidity and correctness of the algorithm.