船电技术2025，Vol.45Issue(7)：38-44,7.
中压直流船舶电力系统MMC子模块均压控制研究
Research on voltage equalization control of MMC sub-module in medium voltage DC ship power system
吴启洋 1张亮 2熊扬帆 1付彦卓1
作者信息
- 1. 武汉船用电力推进装置研究所,武汉 430064
- 2. 武汉中原电子信息有限公司,武汉 430074
- 折叠
摘要
Abstract
The Modular Multilevel Converter(MMC)used in medium voltage DC ships has a high switching frequency and large system computation based on traditional submodule voltage equalization control by using sorting algorithm.This paper proposes a control strategy to limit the fluctuation range of submodule capacitor voltage.The fluctuation range is first set and the submodules outside this range in the previous control cycle are calculated.Then,the switching of the submodule in the next cycle is determined based on the direction of the bridge arm current,voltage values of each submodule and switching state.The proposed submodule voltage equalization control strategy can effectively reduce the maximum fluctuation rate of the capacitor voltage and the maximum imbalance of the capacitor voltage while greatly reducing the switching frequency of the submodule.The control strategy of limiting the range of sub-module capacitor voltage fluctuation can reduce the switching frequency and system arithmetic of MMC,and it can make the sub-module voltage equalization performance index reach comprehensive optimization,so as to improve the stability and control performance of MMC in the medium-voltage DC ship power system.关键词
模块化多电平换流器/中压直流船舶/子模块均压控制/开关频率Key words
Modular Multilevel Converter(MMC)/medium voltage DC ship/submodule equalization control/switching frequency分类
交通运输引用本文复制引用
吴启洋,张亮,熊扬帆,付彦卓..中压直流船舶电力系统MMC子模块均压控制研究[J].船电技术,2025,45(7):38-44,7.
