一种具有宽输出电压范围的模块化多电平DC-DC变换器拓扑

To solve some problems caused by the ac control method used for the existing modular multilevel dc-dc converter (MMDC), this paper has proposed a new MMDC topology with a wide range of output voltage by means of dc control. By reconstructing the submodule structure, the converter has a power branch and an auxiliary balance branch, which are used to transmit dc power and balance the capacitor volta...