考虑节点电气介数的多组同基最小断点集选取方法

Method for selecting minimum break point set from multi-MBPS with the same cardinal number considering node electric betweenness

最小断点集(MBPS)是复杂环网配合整定计算的起点,其解往往具有多组,需要从中选取最理想的一组。考虑潮流对节点的实际利用情况以及节点对断点保护脆弱性的影响状况,提出了以节点电气介数指标来衡量保护的脆弱程度,给出了一种求取多组同基最小断点集的选取方法。相对于已有的多组同基MBPS选取方法,所选指标更符合电力系统潮流的传播特点以及潮流对节点的实际利用情况,所选取的MBPS更为合适,最后通过算例验证了该算法的有效性和合理性。

The minimum break point set(MBPS) is the starting point for complex and ring network relay protection setting coordination.Typically,the optimal set needs to be selected among several solutions.With consideration of actual node utilization for load flow and impact of node on vulnerability of breakpoint relay protections,the node electric betweenness is selected as relay vulnerability index.An optimal MBPS selection method is described based on proposed index.Compared with existing methods,the proposed method selects more appropriate MBPS because the proposed index is more in line with load flow flowing characteristics and actual node usage.Finally,the effectiveness and feasibility of proposed method are proved with simulation results.