质子交换膜燃料电池/电解槽系统建模及负荷追踪策略

Integrated proton exchange membrane fuel cell (PEMFC) with electrolyzer possessing high efficiency and non-pollution can be used for power generation and energy storage, and are not limited by Carnot cycle leading to a potential application in the field of electric energy supply/storage. This paper studies a hybrid power system consisting of a hybrid PEMFC/electrolyzer system and auxiliary power source and its energy management strategy (EMS), where the auxiliary power source is comprised by photovoltaic cells and batteries. In the hybrid power system, the PEMFC is mainly used to track the load demand, and the auxiliary power supply and electrolyzer compensate the power when the load demand is very high, and recover the extra energy in the case of low load conditions, to ensure the efficient and stable operation of the hybrid power system. The mathematical model of the hybrid PEMFC/electrolyzer power system was constructed in Matlab/Simulink. By analyzing the load demands, a load tracking EMS of the hybrid power system was proposed. Finally, the effectiveness of the model and strategy was verified through simulation analysis of a numerical example.