中国电机工程学报Issue(4)：929-934,6.DOI:10.13334/j.0258-8013.pcsee.2015.04.021
一种快速的模块化多电平换流器电压均衡控制策略
A Fast Voltage Balancing Control Method for Modular Multilevel Converter
摘要
Abstract
Excessive computation was required in the controller of MMC if typical voltage balancing control based on voltage sorting was adopted. A new voltage balancing control method without sorting was presented in this paper. The number of on-state SMs of the previous and the present control cycle were compared and the deviation between capacitor voltages and their average value in bounds was detected to determine whether to recalculate the trigger pulse. The average voltage was selected as reference value, the sub module whose capacitor voltage was lower than the reference value should be switched on prior in charging status, the sub module whose the capacitor voltage was upper than the reference value should be switched on prior in a state of discharge. A MMC model was set up on the PSCAD/EMTDC, the effectiveness of the design control method was verified. The results show that this voltage balancing method can be realized effectively under low frequency.关键词
模块化多电平换流器/电压均衡/平均值比较/开关频率/最近电平控制Key words
modular multilevel converter(MMC)/voltage balancing control/average comparison/switching frequency/nearest level control分类
信息技术与安全科学引用本文复制引用
喻锋,王西田,林卫星,刘丽霞..一种快速的模块化多电平换流器电压均衡控制策略[J].中国电机工程学报,2015,(4):929-934,6.基金项目
国家自然科学基金项目(51277119)。Project Supported by National Natural Science Foundation of China(51277119) （51277119）
