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投稿时间：2020-03-24
投稿时间：2020-03-24
中文摘要: 为抑制模块化多电平换流器（MMC）内部的环流，提出了一种准比例谐振（PR）控制结合虚拟阻抗的复合环流控制方法。首先分析了MMC的拓扑结构以及内部环流产生的原因；其次设计了PR控制器，对桥臂环流二倍频谐波进行抑制，设计了虚拟阻抗实现对环流高次谐波的抑制；最后在MATLAB/Simulink平台上搭建了五电平MMC逆变电路模型。仿真结果表明，所提出的环流抑制策略能有效减小环流的交流波动幅值。
Abstract:In order to suppress the circulating current inside the modular multilevel converter (MMC), a composite circulating current control method combining quasi-proportional resonance (PR) control and virtual impedance is proposed.The article first analyzes the topological structure of MMC and explains the reasons for the internal circulating current.Secondly, a PR controller is designed to suppress the double-frequency harmonics of the circulating current of the bridge arm, and a virtual impedance is designed to suppress the higher harmonics of the circulating current.Finally, a five-level MMC inverter circuit model was built on the MATLAB/Simulink platform.The simulation results proved that the proposed circulating current suppression strategy can effectively reduce the AC fluctuation amplitude of the circulating current.
keywords: modular multilevel converter circulating current suppression quasi-proportional resonance controller virtual impedance
文章编号：20213003 中图分类号：TM723;TM464 文献标志码：
基金项目:上海市科技创新行动计划（19DZ1205402）。
引用文本：
景旭川,曹以龙,江友华.PR+虚拟阻抗复合控制的MMC环流抑制策略[J].上海电力大学学报,2021,37(3):221-225.
JING Xuchuan,CAO Yilong,JIANG Youhua.Circulation Suppression Strategy of MMC Based on PR + Virtual Impedance Compound Control[J].Journal of Shanghai University of Electric Power,2021,37(3):221-225.
景旭川,曹以龙,江友华.PR+虚拟阻抗复合控制的MMC环流抑制策略[J].上海电力大学学报,2021,37(3):221-225.
JING Xuchuan,CAO Yilong,JIANG Youhua.Circulation Suppression Strategy of MMC Based on PR + Virtual Impedance Compound Control[J].Journal of Shanghai University of Electric Power,2021,37(3):221-225.