基于重要度评价矩阵的电网关键节点辨识  

Identification of Vital Node in Power Grid Based on Importance Evaluation Matrix

作　　者：朱国威[1] 王先培[1] 贺瑞娟 田猛[1] 代荡荡 张其林[2] 

机构地区：[1]武汉大学电子信息学院,武汉430072 [2]湖北文理学院,襄阳441053

出　　处：《高电压技术》2016年第10期3347-3353,共7页High Voltage Engineering

基　　金：国家自然科学基金(50677047;61201168);湖北省自然科学基金(2015CFB563)~~

摘　　要：电网中存在某些脆弱环节对系统连锁故障有重要影响,如何有效识别这些脆弱环节是目前的一个重要研究内容。以IEEE 39节点系统作为测试算例,在直流潮流优化模型下,研究了电网部分节点移除对电力系统连锁故障的影响,采用了最大供电区域指标校验节点损失代价。并基于复杂网络特征参数及电网物理特性,定义了电网节点重要度矩阵,构造了一种电网关键节点辨识模型。该模型综合考虑节点及其相邻节点度值、节点效能值和线路的电抗值来表征电网节点重要度。仿真结果表明,电网的高度数节点不一定是引起连锁故障的关键节点,节点在整个网络中的效能值及其相邻节点度数是决定其关键程度的共同影响因素,该算法可以有效识别电网中的关键节点。The failure of some components in the power grid has great impact on cascading failure in the power systems, there is a critical need for the identification of vulnerable components. Taking IEEE 39-bus systems as an example, we investigate the impact of node failures in the power grid on the cascading failures in power systems based on DC power flow model, and use the index of max supply area to test the power loss cost. Important matrix of power grid is defined and the vital node identification model of power grid is built based on the characteristic of complex network and the physical property of power grid. The model, which comprehensively combines node degree, adjacent node importance contribution, node efficiency, and the line reactive value, is used to evaluate the power grid node importance. Simulation results show that the high degree nodes in power grid are not always the vital node, and the node efficiency and adjacent node importance contribution are determinants of the order in power grid. The test on 39-bus system also demonstrates the validity of the proposed algorithm.

关 键 词：关键节点辨识 重要度矩阵 直流潮流模型 连锁故障 复杂网络 

分 类 号：TM732[电气工程—电力系统及自动化]