Fuzzy Control Strategy for Load Power Distribution of Multi Stack Fuel Cell System Based on Cuckoo Algorithm

Abstract

In hybrid ships, individual fuel cells suffer from low system reliability and low efficiency. In order to maximize system stability and efficiency, the hydrogen consumption of hydrogen fuel cells is reduced. The structure of hybrid power source system composed of multiple fuel cells and batteries in parallel is proposed, and the power equal allocation strategy is formulated for hybrid ships based on fuzzy logic control mode, that is, the working number of fuel cells and the output power of fuel cells are flexibly regulated according to the load power of the propulsion system and the SOC (State of Charge) of the battery, The whole hybrid power source system can quickly follow the load power demand, ensure continuous operation in the high efficiency range, and save the hydrogen consumption of the hydrogen fuel cell. The simulation results with MATLAB/Simulink show that the hybrid power source system can quickly meet the complex and changeable load power demand, and can improve the efficiency of the hybrid power source system, and reduce the hydrogen consumption by 18.26%. The proposed energy management strategy based on fuzzy control can be applied to multi stack fuel cells of hybrid ships, effectively improve the efficiency of hybrid power source system, and have practical value of energy saving and consumption reduction.