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电力系统连锁故障的多层时序运行演化模型与应用

DOI: 10.13334/j.0258-8013.pcsee.2015.S.011, PP. 82-92

Keywords: cascadingfailure,blackout,time-seriesoperationevolutionmodel,macrosecurityfeatures,microvulnerablecomponents

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Abstract:

为研究电网大停电事故的宏观安全特征,并揭示连锁故障过程中呈现的微观脆弱环节,提出多层时序运行演化模型对连锁故障进行模拟。该模型由运行内层、时序中层及演化外层构成,较传统仿真模型在负荷时序规则、故障传播方式及电网建设等方面均具有更加合理的设置,能够较为真实地反映电网运行、发展与连锁故障的关系。采用IEEE300节点系统和某省级实际电网作为连锁故障仿真算例,结合电网自组织临界性与负荷损失时序特性,说明所建模型揭示更加了符合实际的连锁故障宏观安全特征;同时,针对仿真结果所揭示的脆弱线路、重要无功支撑节点及故障线路同步性等电网脆弱环节,与已有方法和指标进行对比,验证了所建模型亦可用于揭示电网微观脆弱环节辨识。

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