基于电流介数的电力系统脆弱性评估.pdfVIP

学兔兔 第51卷 第l2期 电测与仪表 VO1．51 No．12 2014年 6月25日 Electrical Measurement Instrumentation Jun．25，2014 基于电流介数的电力系统脆弱性评估 张虹，田雨青 (东北电力大学 电气工程学院，吉林吉林 132012) 摘要：为了在电网发生大停电事故时有效识别故障方向，文章基于基尔霍夫定律，提出了线路的电流介数指标。 该指标是在输电网中潮流有向的沿所有可能路径传输的模型下建立的，同时考虑了线路可通过的最大电流值 及网络的拓扑特点，与电气介数相比该指标更能体现实际电网的特点。通过对IEEE一39节点系统在不同攻击后 最大传输能力的差异，表明了电流介数指标的正确性与合理性。 关键词：拓扑影响因子；电气介数；电流介数；最大传输能力 中图分类号：TM933 文献标识码：B 文章编号：1001—1390(2014)12—0040—04 Vulnerability Assessment in the Power System Based on the Current Betweenness ZHANG Hong，TIAN Yu-qing (College of Electrical Engineering，Northeast Dianli University，Jilin 1 320 1 2，Jilin，China) Abstract：To identify the direction of cascading failure efficiently when the power grid blackouts happen-the current betweenness index was proposed in this paper based on Kirchhoffs laws to find out the vulnerable lines．The index was established under the model in which power flow transmitted alongall the possible paths，and meanwhile the maximum current and the topological characteristics of the network were also taken into account．The current betweenness index could reflect the characteristics of the actual power grid better than the electric betweenness．The differences in the maximal transmitting capability of the IEEE39-bus system under two kinds of attack showed the correctness and rationality of the current betweenness index． Key words：topology impact factor，electric betweenness，current betweenness，maximal transmitting capability 0 引 言 作为权重，提出加权介数指标评估线路脆弱性。然而 印度北方电网于2012年7月份接连发生两起大停 这些参数仅从拓扑结构单个角度分析电力系统，所研 电事故，与国内外其他案例相似，这两起事故也是由