电力系统及其自动化学报2018，Vol.30Issue(3)：42-49,8.DOI:10.3969/j.issn.1003-8930.2018.03.006
采用基数排序算法的MMC优化均压策略
Optimized Voltage Balancing Strategy Based on Radix Sort Algorithm for Modular Multilevel Converter
摘要
Abstract
To reduce the sorting computation load of voltage balancing control for modular multilevel converters (MMCs)with excessive number of sub-modules and the switching frequency of the sub-modules,an optimized voltage balancing strategy is proposed for MMC based on radix sort algorithm.Firstly,the principle of radix sort algorithm is an-alyzed,and it is pointed out that when there are excessive sub-modules,using radix sort for the voltage balancing con-trol of MMC can reduce the sorting computation load.Secondly,according to the allowable fluctuation range of sub-mod-ules'capacitor voltage and the principle of radix sort algorithm,an optimized voltage balancing strategy is proposed, which can not only reduce the sorting computation by reducing the numbers of"collection"and"distribution"in the sort-ing process,but also can avoid the unnecessary switching operations resulting from the small changes in sub-modules' capacitor voltage and thus reduce the switching frequency.Simulation and experimental results verified the feasibility and higher efficiency of the proposed optimized voltage balancing strategy.关键词
模块化多电平换流器/均压控制/基数排序算法/开关频率Key words
modular multilevel converter(MMC)/voltage balancing control/radix sort algorithm/switching frequency分类
信息技术与安全科学引用本文复制引用
荣飞,徐业事,黄守道,李幸..采用基数排序算法的MMC优化均压策略[J].电力系统及其自动化学报,2018,30(3):42-49,8.基金项目
国家重点研发新计划资助项目(2016YFB0901001) （2016YFB0901001）
