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基于映射弹性势能的电网有功承载能力定量指标

DOI: 10.13334/j.0258-8013.pcsee.2014.13.010, PP. 2088-2099

Keywords: 映射弹性势能,电网有功承载能力,支路负载均衡性,关键线路

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Abstract:

电网的有功承载能力取决于电网结构、支路承载能力以及电源和负荷的分布,其定量的分析方法及指标仍然是电网安全分析中的难题.基于支路有功、相位角及电网接线拓扑映射的纵向受力弹性力学网络模型,采用支路势能叠加法和边界势位法得到总的映射弹性势能.分析表明,该映射弹性势能可表征电网的有功承载能力和支路负载均衡性:其值越大,则电网的有功承载能力越弱,支路有功功率分配越不均衡.算例仿真验证了这些特性,该映射弹性势能也适用于识别电网的关键线路.该定量指标可用于电网规划、运行方式分析、离线或在线安全分析.方法

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