Energy management strategy of hydrogen-powered ship based on real-time wavelet-fuzzy control

In order to solve the problems of unstable DC bus voltage, degradation of power quality, and shortening of power source life caused by large fluctuations in demand power in the multi-energy system of ship based on hydrogen fuel cell, firstly, a hybrid power system model of fuel cell, Li-ion battery and supercapacitor is constructed, then an energy management strategy based on the fusion of real-time wavelet transform and fuzzy control is proposed. Simulation analysis is carried out in MATLAB/Simulink, and the simulation results show that the proposed real-time wavelet transform-fuzzy control strategy has a better control effect, compared with the logic rule control strategy, the peak value of DC bus voltage is smaller, and the power quality of the system has been significantly improved; the range of fluctuation is smaller, and the service life of the power source is extended.