基于小世界拓扑模型的电网脆弱性评估  

Assessment of Power Grid Vulnerability Based on Small-World Topological Model

作　　者：肖盛[1] 张建华[1] 

机构地区：[1]华北电力大学电气与电子工程学院,北京市昌平区102206

出　　处：《电网技术》2010年第8期64-68,共5页Power System Technology

基　　金：北京市教育委员会共建项目建设计划资助

摘　　要：提出了基于小世界拓扑模型的大型电网脆弱性评估方法,以此来探索大电网中连锁故障传播的机理。首先进行电网的加权拓扑建模和网络基本特征参数计算;其次在随机攻击和蓄意攻击的形式下,通过计算其全局效率指标来分析电网的脆弱性程度;最后利用渗渝理论和最大供电区域理论计算电网在这2种攻击方式下的临界水平。通过对国内某一区域电网进行研究表明:小世界电网对重要节点的依赖性远远大于普通节点,外部因素并不能从根本上改变电网固有的结构脆弱性,合理安排电网的网架结构将有助于改善电网的可靠性和稳定性水平。A new method to assess vulnerability of large-scale power grid based on small-world topological model is proposed to explore the spread mechanism of cascading failure in large-scale power grid. Firstly, the weighted topological modeling and calculation of basic characteristic parameter of power network are conducted; then under the presupposition of random attack and malicious attack, by means of calculating global efficiency indices the vulnerability of power grid is analyzed; finally, by use of percolation theory and maximum power supply area theory the critical levels of the grid under both attacks are computed. The research on a certain regional power grid in China shows that the dependence of small-world power grid on key nodes is much greater than that on common nodes, and external factors cannot improve inherent structural vulnerability of power grid by the root, thus rationally arrangement of grid structure contributes to improve reliability and stability level of power grid.

关 键 词：小世界网络 复杂网络理论 脆弱性评估 连锁故障 最大供电区域 加权拓扑模型 渗渝理论 

分 类 号：TM72[电气工程—电力系统及自动化]