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受端电网最大直流受入规模分析方法

DOI: 10.13336/j.1003-6520.hve.2015.03.010, PP. 770-777

Keywords: 受端电网,电网规划,网架结构,直流落点,动态无功,多直流馈入,多目标优化

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Abstract:

确定受端电网最大直流受入规模是电网规划的重要内容之一。为此,提出在网架结构优化、直流落点优化和动态无功补偿配置优化的基础上,采用启发式规划方法求取最大直流受入规模。电网规划优化从兼顾短路电流控制和提高多直流馈入支撑能力出发,分别给出了以限流方案投资、限流效果和综合多馈入短路比最优为目标的多目标函数及网架结构优化方法。直流落点优化通过综合多馈入短路比为指标的排序优选,动态无功补偿配置选点优化通过电压灵敏度的无功补偿安装效果评估指标排序实现。结果表明考虑配置一定规模的动态无功补偿装置,江苏电网可承受的最大直流规模为6回,共42.2GW;若不考虑动态无功补偿装置,江苏电网可承受的最大直流规模为5回34.2GW。优化方法应用于江苏规划电网,可提高多直流馈入电网稳定性和承受直流能力。

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