CAJ | 학술논문

提出了基于直流潮流计算的电气介数和新的网络效能指标，来辨识复杂电网中的脆弱线路。该电气介数克服了电抗加权拓扑介数假设“发电-负荷”节点间潮流沿最短路径或最有效路径传播的缺点，且考虑了发电容量和负荷容量及其分布的影响。引入了考虑电气距离和容量分布的网络效能指标来表征故障后的网络效能。由 IEEE39节点和 IEEE118节点的数值仿真可知，高电气介数线路通常属于长程连接，处于重要的输电通道上，对这些线路的蓄意攻击，电网效能迅速下降，证实了电气介数能辨识复杂电网中的脆弱线路。
제출료기우직류조류계산적전기개수화신적망락효능지표，래변식복잡전망중적취약선로。해전기개수극복료전항가권탁복개수가설“발전-부하”절점간조류연최단로경혹최유효로경전파적결점，차고필료발전용량화부하용량급기분포적영향。인입료고필전기거리화용량분포적망락효능지표래표정고장후적망락효능。유 IEEE39절점화 IEEE118절점적수치방진가지，고전기개수선로통상속우장정련접，처우중요적수전통도상，대저사선로적축의공격，전망효능신속하강，증실료전기개수능변식복잡전망중적취약선로。
Line electrical betweenness based on DC load flow and a new net efficiency index are proposed to identify the vulnerable lines in the complex power grid. The electrical betweenness not only overcomes the shortcoming of the weighted reactance betweenness which assures that power is transmitted through the shortest or the most effective paths, but also considers the impact of the capacity and distribution of generators and load. A new net efficiency index, which considers electrical distance and capacity distribution, is introduced to measure the efficiency of power grid after attack. Numeric simulation results of IEEE-39 and IEEE-118 show the lines with high electrical betweenness usually belong to long-distance and are the important transmission lines. If these lines are attacked intentionally, the efficiency of power grid would descend rapidly. The results also show that the betweenness index can identify the vulnerable lines in the complex power grid. <br> This work is supported by National Natural Science Foundation of China (No. 61134001).