基于保护综合重要度的最小断点集优选方法

A method for selecting optimal minimum break point set based on evaluation of protection comprehensive importance

为实现复杂环网整定配合起始点的合理选择,本文提出了一种基于保护综合重要度的最小断点集优选方法。首先,定义了反映保护所处位置电气耦合程度的保护配合度指标;其次,基于保护事故链模型并结合风险理论,进而得到保护风险脆弱度指标;然后,结合线路电气介数和节点电气介数得出了保护结构重要度指标;最后,运用层次分析法确定各指标权重,构建了多层次多角度的保护重要度评价模型,并跟据保护综合重要度指标给出了一种最小断点集优选问题的解决方法。与已有的方法比较,本文所提出的方法较为全面地评估了保护重要度,以此确定的最小断点集具有参考意义。本文通过算例验证了该方法的全面性和有效性。

It is proposed to select minimum break point set based on protection comprehensive importance in order to obtain the reasonable starting points for complex network setting coordination.Firstly,coordination degree of protections was defined to reflect the electrical coupling degree of protection location.Secondly,based on protection fault chain model and combining with risk theory,thus the indicator of protection risk vulnerability was obtained.Thirdly,structural importance of protection was acquired by combining the line electric betweenness with the node electric betweenness.Finally,a multi-level and multi-angle protection importance evaluation model was established by comprehensively considering the above three aspects.Then a solution for selecting optimal MBPS was given according to protection comprehensive importance index.Making a comparison with the existing methods,this method evaluates protection importance more comprehensively,making the selection of MBPS more valuable.In the end,the example of simulation shows that this method is comprehensive and effective.