潮流介数理论在输电网断线风险评估中的应用  

Application of Power Betweenness Theory in Assessment on Line-Breakage Risk in Transmission Network

作　　者：郭小敏[1] 黄俊 杨健维[1] 何正友[1] 

机构地区：[1]西南交通大学电气工程学院,四川省成都市610031 [2]中国国电集团西藏分公司,西藏自治区拉萨市850000

出　　处：《电网技术》2015年第2期486-493,共8页Power System Technology

基　　金：国家高技术研究发展计划(2012AA050208);国家自然科学基金青年基金项目(51207130);中央高校基本科研业务费专项资金资助(2682013CX015)~~

摘　　要：将潮流介数理论应用于输电网断线风险评估。首先,定义了象征线路关键性的线路潮流介数和象征节点重要性的节点潮流介数;其次,结合传统故障后果严重度指标,建立了基于潮流介数的线路过载严重度指标和节点电压越限严重度指标;最后,将输电网断线故障的概率与基于潮流介数的严重度指标结合,得到了基于潮流介数的断线风险评估指标。仿真结果表明,该方法能科学、合理地评估输电网断线风险,为运行人员防控连锁故障提供有益的辅助信息,避免重大事故的发生。To Apply power betweenness theory in the assessment on the risk of line-breakage in transmission network, firstly, the line＇s power betweenness characterizing the critical role of the transmission line and the node＇s power betweenness are defined; secondly, combining with traditional severity index of fault consequence the power betweenness based severity index of line overload and the severity index of out-of-limit nodal voltage are established; finally, integrating the probability of line-breakage in transmission network With the power betweenness based severity indices, the power betweenness based assessment index for line-breakage risk is obtained. Simulation results show that using the proposed method the risk of line-breakage in transmission network can be assessed scientifically and reasonably and related helpful auxiliary information can be provided to dispatchers to prevent major accident due to cascaded failures.

关 键 词：潮流介数 断线风险 风险评估 

分 类 号：TM721[电气工程—电力系统及自动化]