Proposed Z-Source Electrical Propulsion System of a Fuel Cell/Supercapacitor-Powered Ship

The use of green energy to power ships in the marine industry has attracted increasing attention recent years. This paper presents an inland river cruise ship supplied by a fuel cell (FC) as main source and supercapacitor (SC) auxiliary source. Its propulsion inverter adopts proposed high-boost Z-source inverter, high-voltage-boost (HVB-ZSI) principle is studied. advantages this HVB-ZSI two cases are verified through simulation. In case 1, it can be seen that capacitance voltage only 250 V, maximum inductance’s inrush current at start less than 200 A. But reaches 383 300 While considering different constraints system, four operating modes for set FC SC proposed. small-signal model system derived, control strategy By controlling shoot-through duty cycle modulation factor, power, output state charge (SOC) controlled. Finally, verify performance hybrid prototype equipped with 7.5 kw motor constructed. Four entire simulated MATLAB/SIMULINK, its analyzed experimental results. These results show new promising application ships, higher reliability lower complexity cost compared conventional systems.