周月宾;江道灼;郭捷;梁一桥;胡鹏飞;林志勇;

• 1:浙江大学电气工程学院

摘要(Abstract)：

在交流系统不对称的情况下,三相模块化多电平换流器(modular multilevel converter,MMC)内部会出现零序性质的2次谐波环流,该零序分量将进入MMC直流侧,加剧直流电压、电流和功率的2倍频波动。为抑制直流侧功率的2倍频波动,以瞬时功率理论和比例谐振调节器为基础,设计了两相静止坐标系下MMC的控制策略。该控制策略由交流回路控制和直流回路控制2部分构成,前者实现MMC与交流系统之间的功率调节;后者实现MMC内特性的调节,主要抑制MMC环流中的2次谐波成分,使桥臂电流波形接近正弦。仿真系统采用不控整流站,逆变站采用MMC,结果表明:在交流系统不对称的情况下,该控制策略有效抑制了环流中的2次谐波成分以及MMC直流侧电压、电流和功率的2倍频波动。

关键词(KeyWords)： 直流输电;模块化多电平换流器;瞬时功率;交流回路;直流回路;比例谐振调节器;不对称

Abstract:

Keywords:

基金项目(Foundation): 国家863高技术基金项目(2008AA05Z213);; 浙江省重点科技创新团队项目(2010R50004)资助~~

作者(Author): 周月宾;江道灼;郭捷;梁一桥;胡鹏飞;林志勇;

Email:

DOI: 10.13335/j.1000-3673.pst.2013.03.022

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