宋平岗;吴继珍;邹欢;林家通;罗善江;

• 1:华东交通大学电气与电子工程学院

摘要(Abstract)：

首先,建立了ab坐标系下模块化多电平换流器(modular multilevel converter,MMC)交流电压与功率之间的数学模型,结合微分平坦理论提出一种可适用电网正常和故障2种工况下的MMC直接功率平坦控制策略。控制器分为前馈控制和误差补偿2部分:前馈控制根据期望输出及输入控制变量与输出量之间的数学关系,规划系统控制变量的运行轨迹;误差补偿环节消除系统不确定因素和外部干扰引起的实际输出与期望输出间的误差。为获取电网电压不平衡功率参考值,提出一种无需电流正负序分离的功率补偿方法。仿真结果表明,所提出的控制策略在电网电压平衡和故障2种工况下运行良好,且不受电感参数变化和电网频率偏移的影响。

关键词(KeyWords)： 模块化多电平换流器;高压直流输电;微分平坦理论;直接功率控制;电网电压不平衡

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51367008)~~

作者(Author): 宋平岗;吴继珍;邹欢;林家通;罗善江;

Email:

DOI: 10.13335/j.1000-3673.pst.2016.02.033

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