电源学报2025，Vol.23Issue(2)：96-104,9.DOI:10.13234/j.issn.2095-2805.2025.2.96
一种应用于MMC的具有较高次环流抑制功能的改进载波移相调制策略
Improved Carrier Phase-shifted Modulation Strategy Applied to MMC with Higher-order Circulating Current Suppression Function
摘要
Abstract
When a modular multilevel converter(MMC)adopts the traditional carrier phase-shifted pulse width modulation strategy,the additional capacitor voltage balance strategy for submodules will cause the number of submodules in each phase circuit of the MMC to jump at a high frequency.Therefore,a large induced pulse voltage will appear on the inductance of the bridge arm,which will generate a high-frequency harmonic circulating current,thereby increasing the voltage and current stress of components.Based on the study of the traditional carrier phase-shifted modulation strategy and its application to the MMC,the implementation process is improved to ensure that the number of submodules in each phase circuit of the MMC is constant at any time,so as to avoid the above problems.The improved carrier phase-shifted modulation strategy is analyzed in detail,and the corresponding capacitor voltage balance control strategy is given.Simulation and experimental results show that the circulating current amplitude of the bridge arm is reduced after adopting the improved carrier phase-shifted modulation strategy.关键词
模块化多电平换流器/载波移相调制/电容电压平衡/高次环流抑制Key words
Modular multilevel converter(MMC)/carrier phase-shifted modulation/capacitor voltage balance/high-order circulating current suppression分类
信息技术与安全科学引用本文复制引用
董一诺,白志红..一种应用于MMC的具有较高次环流抑制功能的改进载波移相调制策略[J].电源学报,2025,23(2):96-104,9.基金项目
国家自然科学基金资助项目(51877194)This work is supported by National Natural Science Foundation of China under the grant 51877194 （51877194）
