基于复杂网络与风险的电网综合脆弱性评估
摘要：电力系统中的元件是否有脆弱,不仅在于它在电网结构中的地位,也与它的运行状态有关。本文应用复杂网络理论将支路与节点定义为脆弱源,应用改进的电气介数来评价电网结构脆弱性;然后考虑脆弱源自身故障对电网造成的影响以及对其他脆弱源故障的敏感程度,用风险指标表征运行状态脆弱性。针对以往只考虑系统最大运行方式的不足,提出多负荷水平模型来计及不同负荷状态下脆弱性可能存在的差异,最后得到元件综合脆弱性指标。该方法能够弥补单一分析结构或运行状态的不足,有效辨识出系统可能引发大停电事故的薄弱环节。算例分析表明本文采用的方法对电网的脆弱环节辨识能力较强,辨识精度较高,能够为电网的运行维护与规划提供有力的参考。
Abstract:Whether the component of power system is vulnerable or not not only depends on its position in network structure, but also is relative to the operation state. In this paper, the branches and nodes are defined as vulnerable sources by using complex network theory, and the improved electrical betweenness is applied to evaluate the structure vulnerability of power grid. Then, the influence of vulnerable source fault on power grid and its sensitivity to other vulnerable source fault are considered, and risk index is used to represent the vulnerability of operation state. As to the shortcomings of only considering the maximum operation mode, multi-load-level model is proposed to account for the possible differences of vulnerability under different load conditions, and the comprehensive vulnerability index can be calculated. The proposed method can make up the shortcomings of single-analysis structure or operation state, and efficiently identify the weak link which can cause blackout accident. Through the analysis and calculation of examples, the results show that the proposed method has strong recognition ability and high identification precision, which can provide a powerful reference for operation maintenance and planning.
标题：基于复杂网络与风险的电网综合脆弱性评估
英文标题：Comprehensive Vulnerability Evaluation of Power Grid Based on Complex Network and Risk Theory
作者：王志强, 李欣, 李岩, 刘文霞,
关键词：城市电网, 脆弱性, 复杂网络, 风险理论, 多负荷水平,
发表日期：2014-06-09
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