摘要
基于循环嵌套(NL)机理的模块化多电平变换器(MMC)的输出电平数与各组子模块数的乘积成正比,在低压场合具有较大优势。由于每个嵌套层内的子模块电容电压不相同,其调制策略以及电压平衡控制较传统MMC相对复杂。此处对NLMMC的调制策略进行了改进,并在其基础上提出了一种适用于NLMMC的子模块电容电压分层控制策略,并通过实验验证了该方法的有效性。
The number of output level of nested loop modular multilevel converter（NLMMC） is proportional to the product of the number of each group sub-module which has a larger advantage in the low voltage situation.Since the voltage of sub-module capacitance are different in each nested layer, the modulation strategy and voltage balance control is relatively complicated than traditional modular multilevel converter（MMC）.The modulation strategy of NLMMC is improved, a kind of sub-module capacitance voltage layered control strategy applied to NLMMC is proposed and the effectiveness of the methods is verified by experiment.
出处
《电力电子技术》
CSCD
北大核心
2016年第7期54-56,共3页
Power Electronics
基金
国家电网公司科技发展计划项目~~
