A novel multi-port solid state transformer enabled isolated hybrid microgrid architecture

This paper proposes a multi-port solid state transformer (SST) to integrate a hybrid microgrid with 380 V dc, 48 V dc and 415 V ac sub-grids to the medium voltage distribution network. The system replaces multiple single phase transformers in the conventional SST with one multi-winding transformer thereby reducing the magnetics involved. Moreover, the individual dual active bridges (DAB) in the conventional SST is replaced by Multiple Active Bridge (MAB) configuration which reduces the number of H-bridges. The individual sub-grids are isolated, thus eliminating circulating current flow between them. The control architecture and power management for the system are discussed and verified through simulations using MATLAB Simulink.

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