一种具有新型中间子模块以降低电容电压波动的模块化多电平变换器拓扑

This letter proposes a modified topology of modular multilevel converter for medium-voltage applications, which can reduce the ac-voltage fluctuation in the submodule (SM) capacitor at low-frequency operation. A novel structure of middle SM is inserted between the upper and lower arms, which has lesser count of components compared with the existing ones, leading to the reduction in cost and power ...