崔福博;郭剑波;荆平;周飞;宋洁莹;

• 1:中国电力科学研究院
• 2:国网智能电网研究院

摘要(Abstract)：

建立了基于模块化多电平换流器(modular multilevel converter,MMC)拓扑的统一潮流控制器(unified power flow controller,UPFC)的详细数学模型,讨论了串联式接入系统和并联式接入系统对MMC内部特性的影响,结果显示串联式接入更易出现上下桥臂电容电压不平衡现象;探讨了低频环流的本质,揭示了单相系统功率与环流的关系,得到通过控制桥臂电容电压可抑制低频环流的结论。以理想工况下桥臂电容电压为控制目标,设计了基于基频和负序二倍频旋转坐标系的电压平衡控制器,该控制器可同时适用于并联侧和串联侧。RTDS仿真结果证明在最近电平逼近调制下所提控制策略可有效控制桥臂电压平衡,并能抑制负序二倍频环流。

关键词(KeyWords)： 模块化多电平换流器;统一潮流控制器;电压平衡控制策略;环流抑制

Abstract:

Keywords:

基金项目(Foundation): 国家863高技术基金项目(2012AA050401)~~

作者(Author): 崔福博;郭剑波;荆平;周飞;宋洁莹;

Email:

DOI: 10.13335/j.1000-3673.pst.2014.07.034

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