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1.四川大学电气工程学院,四川省成都市 610065
2.四川省水利人才资源开发与档案中心,四川省成都市 610041
3.国网江苏省电力公司无锡供电公司,江苏省无锡市 214000
Received:07 November 2024,
Revised:2025-05-20,
Published Online:18 July 2025,
Published:25 September 2025
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罗辰昊,刘星,姚秀丽等.基于结构关系与风险量化的连锁故障扩展关键环节辨识[J].电力系统自动化,2025,49(18):83-96.
LUO Chenhao,LIU Xing,YAO Xiuli,et al.Identification of Expanded Key Links for Cascading Failures Based on Structural Relationship and Risk Quantification[J].Automation of Electric Power Systems,2025,49(18):83-96.
罗辰昊,刘星,姚秀丽等.基于结构关系与风险量化的连锁故障扩展关键环节辨识[J].电力系统自动化,2025,49(18):83-96. DOI: 10.7500/AEPS20241107003.
LUO Chenhao,LIU Xing,YAO Xiuli,et al.Identification of Expanded Key Links for Cascading Failures Based on Structural Relationship and Risk Quantification[J].Automation of Electric Power Systems,2025,49(18):83-96. DOI: 10.7500/AEPS20241107003.
随着电力系统规模持续扩大、结构日趋复杂,其发生连锁故障的风险随之增加。为提升系统风险防控能力、准确识别连锁故障关键环节并揭示各环节间耦合关系及相互作用,文中对连锁故障关键环节定义进行了扩展,引入关键传播关系与关键区域概念,提出一种基于结构关系与风险量化的扩展关键环节辨识方法。首先,建立配合-过载型连锁故障事故链模型对故障态势与传播路径进行分析;其次,采用一种基于导率优化的局部扩展算法挖掘电网的模糊重叠动态社区结构,实现对电网核心区域与模糊区域的识别;再次,利用事故链集和分区结果构建具有时空特征的风险时空传播图,并采用多维故障影响的量化指标对扩展关键环节进行辨识;最后,在IEEE 39节点系统和IEEE 118节点系统中进行算例仿真。结果表明
所提方法能够有效辨识扩展关键环节,揭示连锁故障不同环节间的耦合关系与级联作用。
With the continuous expansion of the scale and the increasing complexity of the structure of power systems
the risks of cascading failures increase accordingly. To enhance the risk prevention and control capabilities of systems
accurately identify the key links in cascading failures
and reveal the coupling relationship and interactions among various links
the definition of key links in cascading failures is extended
and an identification method of expanded key links based on structural relationship and risk quantification is proposed by introducing the concepts of key propagation relationship and key areas. Firstly
a coordination-overload fault chain model for cascading failures is established to analyze the fault situation and propagation paths. Secondly
a local expansion algorithm based on the conductance optimization is employed to discover the fuzzy overlapping dynamic community structure of the power grid
and realize the identification of both core and fuzzy areas of power grids. Thirdly
by using the fault chain set and partitioning results
a risk spatiotemporal propagation graph with temporal and spatial characteristics is constructed
and the expanded key links are identified by employing the multi-dimensional fault impact quantification metrics. Finally
case simulations are conducted on the IEEE 39-bus system and the IEEE 118-bus system. The results demonstrate that the proposed method can effectively identify the expanded key links
and reveal the coupling relationship and cascading effects among various links.
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