Solid State Transformer Interface Based on Multilevel Inverter for Fuel Cell Power Generation and Management

This paper concentrates on the solid state transformer that can be used in fuel cell systems. To distribute the power between fuel cells and load or grid, the new solid state transformer has been developed. The proposed solid state transformer uses high-frequency transformer to increase input voltage and one special multilevel inverter with five switches in basic units. In fact, this multilevel inverter synthesizes a desired output AC voltage from DC voltage sources with a high number of levels associated with a low number of switches and gate driver circuits for switches. Simulation results are given to show the overall system performance including AC voltage generation, hybrid power generation and active power control.