一种具有宽电压增益的无变压器双极性模块化多电平DC-DC变换器

This paper presents a transformerless bipolar dc- dc converter based on series-connected submodules. It is intended for transforming dc voltage and managing power flow for medium/high-voltage dc grids. The dc-dc converter is composed of positive-pole and negative-pole subsystems, each of which consists of six arms/branches. Every two arms and one branch are constructed into a T-type circuit with t...