实际电网动态结构脆弱性分析与评估

Analysis and Assessment of a Realistic Power Grid’s Dynamic Structure Vulnerability

本文主要应用复杂网络理论建立某实际电网网络模型,应用Pajek软件计算电网拓扑结构特征参数,判定电网所属的网络类型,通过随机移除边/点、有目的移出边/点的方法,分析电网的结构脆弱性;针对无向、无权复杂电网模型的不足,以电网线路中电抗值作为权重,建立更加符合电网特性的加权网络模型,研究加权电网模型的脆弱性。通过对比可以发现,加权后网络的平均路径长度与介数略大于未加权网络的。

In this paper, the method of complex network theory is used to establish the network model of a realistic power grid. Pajek is used to calculate the characteristic parameters of the power grid, determine the network type of the grid. By removing edges/nodes randomly or purposefully, the structural vulnerability of power grid is analyzed. For the deficiency of the model of the non-direction, unweighted complex power system, the reactance of power grid is used as weighted values to build a weighted network model. The vulnerability of weighted grid model is investigated. It can be found that the average path length and betweenness in weighted network are slightly larger than them in unweighted network model by comparing the characteristic parameter values of complex power network models.