电流整形模块化多电平DC-DC变换器

The recently proposed modular multilevel dc-dc converter (M2DC) and the HVDC-dc auto transformer (HVDC-AT) enable direct power transfer between dc networks at low-to-moderate step ratios using only a single power electronic conversion stage. In both converter structures, an internal circulating sinusoidal ac current is established to balance the energy within the converter. In practice, however, t...