Abstract
A dc-dc converter is essential for interconnecting HVdc networks of different voltage levels. This letter introduces a new family of dc-dc converters consisting of semiconductor switches and stack of submodules, which is named as hybrid-cascaded dc-dc converter (HCDC). This concept shows very attractive capital costs and low power losses. In this letter, the detailed operating principle of the HCDC is analyzed. Simulation results are obtained from PSCAD/EMTDC to verify the feasibility of the converters. The performances of the converters are evaluated in detail.
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