一种基于串联模块的无变压器双极性多组串DC-DC变换器

This paper proposes a transformerless bipolar multistring dc-dc converter based on series-connected submodules. It is intended for converting dc voltage and managing power flow for medium-voltage high-power dc networks. This new converter has a flexible structure of multistrings and each string consists of four valves with their middle points crossly connected through two cost-effect dc capacitors...