基于复杂网络理论的配电网节点脆弱度评估

摘要

Vulnerable nodes are very important to structural robustness of distribution networks, in order to assess node vulnerability of distribution networks, a method of sorting the vulnerability of distribution network nodes is proposed.Firstly, build the weighted complex network model of distribution network.Secondly, set weights of indexes such as degree, betweenness, agglomeration and closeness to assess importance of each index in describing the vulnerability of nodes, in the perspective of both subjective and objective way.Finally, put forward a method to sort vulnerability of distribution network nodes based on technique for order preference by similarity to ideal solution (TOPSIS) and grey correlation analysis.Test on several typical medium voltage di-stribution networks verifies the feasibility of the method.Analysis of the IEEE123 distribution network shows that multiple index comprehensive evaluation is more reasonable in distribution network than single index eva-luation.%配电网中节点脆弱性的大小是其结构鲁棒性的重要体现,为实现对配电网节点脆弱度的评估,提出对配电网节点脆弱度大小排序的方法.首先,构建配电网的复杂网络加权模型;其次,针对节点脆弱度评估中的度值、介数、凝聚度和紧密度等几个指标,结合主观和客观两方面信息构建描述各指标重要性的权重;最后,提出综合逼近理想排序(Technique for Order Preference by Similarity to Ideal Solution,TOPSIS)和灰色关联度的方法,实现对配电网节点脆弱度大小的排序.对几种典型的中压配电网进行计算,验证了本文方法的可行性,对IEEE123系统分析,结果表明多指标综合评估较单一指标评估更符合配网的实际特点.