Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

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考虑负荷重要度的配电网节点脆弱性分析

来源:电工电气发布时间:2021-03-26 14:26 浏览次数:12
考虑负荷重要度的配电网节点脆弱性分析
 
孔维旭
(西安石油大学 电子工程学院,陕西 西安 710065)
 
    摘 要:由于配电线路具有辐射状拓扑和开环运行状态特性,以致传统的脆弱性评估方法不再适用,而基于复杂网络理论的评价方案虽可以准确识别网络拓扑的重要节点,但是未能考虑到不同负荷等级对于脆弱性的影响,会导致脆弱性分析的结果不准确。结合配电网自身特点,给出了一种分析配电网脆弱性的改进评估方案。基于结构脆弱性分析,构建节点度、节点介数指标,使用节点注入功率和节点负荷等级进行加权,以彰显优先级别负荷的重要性;基于状态脆弱性分析,使用灵敏度分析方法构建节点电压敏感度指标。考虑到配电网元件对节点脆弱性的影响,使用风险理论构建节点故障影响度指标。运用层次分析法对各项参数进行赋权,并得出适用于配电网的综合脆弱性指标。使用IEEE 33节点算例对评估模型进行了仿真,验证了所提指标及脆弱性评估体系的可行性。
    关键词:脆弱性分析;复杂网络理论;配电网;层次分析法
    中图分类号:TM727     文献标识码:A     文章编号:1007-3175(2021)03-0008-05
 
Vulnerability Analysis of Distribution Network Nodes Considering Load Importance
 
KONG Wei-xu
(School of Electronic Engineering, Xi’an Shiyou University, Xi’an 710065, China)
 
    Abstract: Due to the characteristics of radial topology and open-loop operating status of distribution lines, traditional vulnerability assessment methods are no longer applicable. The evaluation scheme based on the complex network theory can accurately identify the important nodes of the network topology, but it fails to consider the impact of different load levels on the vulnerability, which will lead to inaccurate results of the vulnerability analysis. In this paper it combines with the characteristics of the distribution network presents an improved evaluation scheme for analyzing the vulnerability of the distribution network. First, based on the structural vulnerability analysis, the node degree and node intermediary indexes are constructed, and the node injection power and the node load level are used to weight to highlight the importance of the priority load. Based on the state vulnerability analysis, the sensitivity voltage analysis method is used to construct the node voltage sensitivity indicators. At the same time, considering the influence of the distribution network components on the vulnerability of the nodes, based on the risk theory, the influence index of the node failure is constructed. Secondly, the AHP is used to weight various parameters, and a comprehensive vulnerability index suitable for the distribution network is obtained. Finally, the IEEE 33 node example is used to simulate the evaluation model, which verifies the feasibility of the indicators and vulnerability assessment system proposed in this paper.
    Key words: vulnerability analysis; complex network theory; distribution network; AHP
 
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