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电网技术  2011 

多直流馈入华东受端电网暂态电压稳定性分析

, PP. 50-55

Keywords: 多直流馈入,受端电网,短路比,多馈入短路比,暂态电压

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Abstract:

基于2015年“三华”特高压规划电网的丰大运行方式,利用短路比和多馈入短路比指标分析了华东受端电网的强度,并讨论了受端系统网架调整和直流系统落点位置对短路比/多馈入短路比的影响。采用PSD-BPA暂态稳定程序,分析了华东受端电网在各种故障下的暂态电压稳定性。结果表明直流系统落点位置对华东受端电网强度的影响较大;交直流系统单一故障、受端特高压交流通道和逆变站换流母线附近线路发生三相永久性短路跳双回故障,大部分直流系统双极闭锁均不会导致华东受端电网暂态电压失稳;锦屏—同里、锡盟—金坛、复龙—奉贤和溪洛渡—浙西特高压直流发生双极闭锁故障后,送端电网需采取切机措施才能保持系统稳定。

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