摘要
对近年来世界各国发生的大停电事故进行分析,指出在输电网络中某条线路因故退出运行而引起的潮流转移是导致后备保护连锁跳闸事故发生或发展的重要原因。提出了线路相关集的概念并进行严格定义,用来限定潮流影响的范围,节省潮流计算的时间。将线路相关集的搜索归纳为最短路径的求解问题,利用k最短路径算法求解线路相关集。分析了多条支路同时断开时线路相关集的搜索办法。另外,定义了线路相关因子,用于估算某条线路或多条线路断开时其他各线路承担的潮流转移分配。利用直流潮流法对线路相关因子进行求解。在此基础上提出了一套事故预警系统,对预想事故后的潮流转移进行快速计算,准确地判断出过负荷线路,有效地进行事故预警。用CEPRI36节点系统进行了仿真验证,证明了所提方法的正确性和有效性。
The analysis of recent catastrophic blackouts occurred in many countries points out that the power flow transfer caused by the tripping of one or a few transmission lines in power grid results in the cascading trips of backup protections. The concept of RCTL（Relative Cluster of Transmission Lines） is defined strictly to limit the accelerate power flow calculation. The search of RCTL influencing range of power flow transfer and is regarded as a shortest path problem and the k shortest path algorithm is applied to it. The RCTL search for multi-line simultaneous trip is also discussed. The concept of RCTL relative factor is defined to evaluate the flow distribution for power flow transfer. DC power flow algorithm is used to calculate the RCTL relative factors,based on which,the accident forewarning system is proposed. It quickly calculates the power flow transfer of an expected accident and exactly estimates the overloaded transmission lines for accident forewarning. Simulation results of CEPRI 36-bus system show its correctness and effectiveness.
出处
《电力自动化设备》
EI
CSCD
北大核心
2007年第9期17-21,共5页
Electric Power Automation Equipment
基金
国家自然科学基金资助项目(50477041)~~
关键词
事故预警系统
相关集
最短路径搜索
相关因子
潮流转移
accident forewarning system
relative cluster
shortest path searching
relative factor
power flow transfer
