采用有向电气介数的脆弱线路选取  

Search for Vulnerable Line Based on Directed Electric Betweenness

作　　者：程临燕[1] 张保会[1] 李光辉[1] 王进[1] 郝治国[1] 薄志谦 

机构地区：[1]西安交通大学电气工程学院,西安710049 [2]英国阿海珐输配电自动化公司

出　　处：《西安交通大学学报》2011年第6期91-96,共6页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金重大资助项目(50595410)

摘　　要：针对电力网络是有向加权网络的特性,在当前运行方式下考虑网络结构的脆弱性,利用线路功率组成,提出了将有向电气介数作为线路脆弱性指标.这样可以真实反映出"发电-负荷"节点对之间功率传输对各线路的占用情况,并且引入发电机出力来考虑不同电压等级线路阻抗的差异,能有效识别出系统的关键线路,同时将传统的只考虑发电机负荷间最短路径的全局效能指标替换为考虑发电机负荷间所有传输路径的有向全局导纳指标,这样物理背景更符合电力系统实际.采用IEEE-39节点系统进行仿真计算,结果验证了该算法的有效性和可行性.Power grid was considered as a directed weighted network to identify the vulnerability of the network structure with the given operating modes. The directed electric betweenness was presented to identify vulnerable lines according to their power components, which can more practically make quantification of the used-ratio of each line by each plant-load pair in power system, while the differences of line-impedance under different voltage-levels were also considered by introducing the generator output coefficient. All the transmission paths between generators and loads were considered in the introduced directed global admittance instead of only the shortest path, thus the physical background of the presented model is more reasonable in power system. And the validity of the proposed algorithm is verified by the calculation result of IEEE-39 bus test system.

关 键 词：有向电气介数 有向全局导纳 脆弱线路 

分 类 号：TM71[电气工程—电力系统及自动化]