摘要
针对当前研究忽略了节点间最短路径的电气联系,为此定义等效电气距离,并据此改进度、凝聚度和紧密度等指标对电网节点进行脆弱性评估,提出综合加权熵和逼近理想排序法(TOPSIS)的节点脆弱度评估方法。评估方法主要从负载率、负载均衡度和失负荷等角度对结构脆弱性指标修正,考虑综合节点故障对系统的影响,构建节点的综合脆弱性指标集。此外,针对信息熵的对称性问题,提出用指标大小进行修正的客观熵权,根据指标作用设置主观权重,将二者综合得到综合权重。最后,提出灰色关联度改进的TOPSIS法,实现对节点脆弱度的评估。以IEEE39节点系统为例验证所提方法的有效性和可行性。
The electrical connection of the shortest path between nodes is neglected in the current research. Therefore the equivalent electrical distance is defined for this purpose. According to the indicator, the improved degree, agglomeration and closeness is proposed to evaluate the vulnerability of nodes of power grids, which is the combination of weighted entropy and technique for order preference by similarity to ideal solution (TOPSIS). The evaluation method mainly corrects the structural vulnerability index from the perspectives of load rate, load balance as well as load loss and considers the impact of integrated node failure on the system to build a comprehensive vulnerability indicator set of nodes. In addition, for the symmetry problem of information entropy, the objective entropy weight modified by the index size is proposed while the subjective weight is set according to the index function. The two are combined to obtain the comprehensive weight. Finally, the TOPSIS method with improved grey correlation degree is proposed to evaluate the vulnerability of nodes. The validity and feasibility of the proposed method are verified by the IEEE 39 node system.
作者
任鹏
李翀
陶鹏
武超飞
李涵
REN Peng;LI Chong;TAO Peng;WU Chao-fei;LI Han(Electric Power Research Institute,State Grid Hebei Electric Power Company, Shijiazhuang 050021, China)
出处
《电力科学与技术学报》
CAS
北大核心
2019年第3期143-149,共7页
Journal of Electric Power Science And Technology
基金
国网河北省电力有限公司科技项目(kj2018-019)
关键词
复杂网络
节点脆弱度
加权熵
TOPSIS
电气距离
complex network
nodes vulnerability
weighted entropy
TOPSIS
electrical distance
