500kVA Hybrid Solid State Transformer (HSST) Design and Implementation of the SST
This paper presents the design and implementation of a solid state transformer (SST) that forms a part of a larger Hybrid Solid State Transformer (HSST) The HSST comprises of a high power line frequency transformer (LFT) and a medium voltage SiC SST. The SST is based on a soft switched dual active bridge topology. Recently developed 7.2kV/60A SiC Austin SuperMOS devices are used as the medium voltage switches. The predicted SST efficiency at 500VRMS and 125A is 98.01 and the net HSST efficiency is estimated at 98.43 at 500kVA. The MV SST has been tested at power of 10kW and results show a high efficiency of 97%
2020 IEEE Energy Conversion Congress and Exposition (ECCE)