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.
出处
《电网技术》
EI
CSCD
北大核心
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
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
small-world networks
complex network theory
vulnerability assessment
cascading failure
maximum powersupply area
weighted topological model
percolation theory
