电力系统保护与控制Issue(6)：116-122,7.
模块化多电平型换流器电容电压二倍频波动抑制策略研究
Study on control strategy for suppressing double fundamental frequency fluctuation of capacitor voltage of modular multilevel converter
高航 1苏建徽 1汪晶晶 1丁云芝 1高健1
作者信息
- 1. 合肥工业大学教育部光伏系统工程研究中心，安徽 合肥 230009
- 折叠
摘要
Abstract
Study on the subject of suppressing the capacitor voltage fluctuation of modular multilevel converter (MMC) is scarce, thus this paper proposes a control strategy for suppressing the double fundamental frequency fluctuation of capacitor voltage of MMC. The sum of capacitor voltages of phase unit reflects the double fundamental frequency fluctuation of submodule capacitor voltage, so the strategy uses double fundamental frequency negative sequence rotational frame to decompose the capacitor voltages of three phase units to dq0 components. An additional controller is designed to control the dq0 components, which suppresses the double fundamental frequency fluctuation of capacitor voltage of submodules. The MMC simulation model containing the additional controller is established based on the Matlab/Simulink. The results show that the phase capacitor voltages controller can suppress the double fundamental frequency fluctuation of submodule capacitor voltage efficiently without increasing the submodule capacitance. It is also shown that this additional controller doesn’t affect the AC voltage and current output by external MMC.关键词
模块化多电平换流器/电容电压波动/二倍频/负序旋转坐标变换/相单元电容电压之和控制器Key words
modular multilevel converter (MMC)/fluctuation of capacitor voltage/double fundamental frequency/negative sequence rotational frame/phase capacitor voltages controller分类
信息技术与安全科学引用本文复制引用
高航,苏建徽,汪晶晶,丁云芝,高健..模块化多电平型换流器电容电压二倍频波动抑制策略研究[J].电力系统保护与控制,2014,(6):116-122,7.
