This paper discusses the power converter interface between the 400 VDC DC microgrid and the European threephase grid (400 VLL). Therefore, power bidirectional step-down topologies are considered in this paper. Among the various topologies, three single-stage non-isolated topologies are compared in terms of semiconductor losses, magnetic component size and heat sink size. These topologies are the seven-switch buck converter, the SWISS converter and the Y-converter. The comparative evaluation is conducted for a 10-kW converter targeting residential or small commercial applications.
AC Grid-interface Bidirectional Buck-Type Converters for DC microgrids: A Comparative Study
Abdelfattah
;Younis T.;Mattavelli P.;Biadene D.
2022
Abstract
This paper discusses the power converter interface between the 400 VDC DC microgrid and the European threephase grid (400 VLL). Therefore, power bidirectional step-down topologies are considered in this paper. Among the various topologies, three single-stage non-isolated topologies are compared in terms of semiconductor losses, magnetic component size and heat sink size. These topologies are the seven-switch buck converter, the SWISS converter and the Y-converter. The comparative evaluation is conducted for a 10-kW converter targeting residential or small commercial applications.
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