S. Bhattacharya
North Carolina State University,
United States
Summary:
The Solid State Transformer [SST] journey from concept to pilot demonstration in a decade will be presented. The SST is shown to be an enabler for DC distribution grids at any node of the AC distribution system. The DC Grid provides an efficient, and economic solution for Data Center power supplies, EV charging infrastructure, DC Microgrids, Electrolysers, and several other applications. The SST for grid interconnection at MV are enabled by the advances in HV SiC power devices at 3.3kV-15kV blocking voltages. The design, control, development, and testing of SST with HV SiC 10kV MOSFETs and 15kV SiC IGBTs will be presented. A pilot demonstration of an MV 4160V, 100kVA SST with SiC 10kV MOSFETs will be discussed. Solid State DC Transformers for DC Grids at both MV DC and LV DC enabled with HV SiC power devices integration of distributed and renewable energy will be enumerated.