基于低维度多环网块的潮流转移快速搜索

Fast search of flow transferring based on low-dimensional multi-loop network blocks

提出了一种基于低维度多环网块的潮流转移快速搜索方法。根据电力网络中各线路切除所产生影响的不同,运用图论的相关知识将整个网络分割成不同的组成部分,在对构成串并联连接关系的线路进行简化处理后,将其中的复杂多环网块构成部分转换成了低维度多环网块,为潮流转移的快速搜索创造了条件。在此基础上,根据潮流转移的路径特征,以开断线路所在的最小回路为基准,通过搜索其相应的分流路径段,快速准确地识别出了网络中存在过载风险的危险线路,很大程度上缩小了安全性分析的范围,对于连锁跳闸故障的预防具有积极作用。仿真结果验证了该方法的有效性和适用性。

This paper proposed a fast search method of flow transferring based on low-dimensional multi-loop network blocks. According to the peripheral impact of different lines removal, this method divided the transmission network into several blocks based on the theory of graph, and transformed the multi-loop complex network blocks into the low-dimensional multi-loop network blocks by making a simplification for lines with series-parallel connection, thus laying a foundation for the fast search of flow transferring. On this basis, according to the path feature of flow transferring, it used the minimal loop containing the overload line as the baseline, accurately recognize risky lines that hav.e risk of overload by searching the shunt path segment of the minimal loop. The security analysis of the whole system is reduced to the analysis of several transmission lines, so it＇ s very beneficial to avoid cascading failure of power system. The simulation results verify the practicability and feasibility of the proposed method.