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电网技术  2014 

基于MMC的STATCOM控制方法

DOI: 10.13335/j.1000-3673.pst.2014.05.002, PP. 1136-1142

Keywords: 模块化多电平换流器,静止同步补偿器,瞬时功率,比例谐振,环流

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Abstract:

为实现不平衡负载情况下无功和负序的同时补偿,详细分析了基于模块化多电平换流器的静止同步补偿器(modularmultilevelconverter-staticsynchronouscompensator,MMC-STATCOM)负序补偿的工作原理,将指令电流信号与实际输出电流相比较产生的三相误差信号变换到两相静止坐标系下,采用比例谐振控制器控制,实现电流无静差跟踪,减小了控制系统复杂程度。针对传统二倍频环流抑制方法的复杂性,提出了基于系统小信号模型的环流抑制方法,该方法针对每一相进行单独控制,适用性广泛。仿真结果验证了所提控制方法的可行性。

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