Optimized Operation of Hybrid Electric-hydrogen Energy Storage Considering Dynamic Efficiency Characteristics of Electrolysers

Aiming at the problem that the hybrid electric-hydrogen energy storage system does not fully take into account the dynamic efficiency operation characteristics of the electrolyzer, this paper proposes a regional power system optimization operation method that takes into account the operation characteristics of the hybrid electric-hydrogen energy storage. Firstly, the dynamic operation model of the electrolyzer considering Faraday efficiency loss is constructed, and its mathematical model is linearized; based on analyzing the coordinated operation mechanism of the electric-hydrogen hybrid energy storage system, the optimal operation model of the regional power system taking into account the operation characteristics of the electric-hydrogen hybrid energy storage system is established to minimize the operation cost of the system and the simulation analysis is carried out based on the improved IEEE-118 system, which shows that the proposed method can improve the overall operation efficiency of the system and the efficiency of the electrolyzer. The results show that the proposed method can improve the system's overall operation efficiency and the electrolyzer's utilization rate, give full play to the complementary advantages of electric-hydrogen energy storage, and promote the efficient and economic consumption of new energy.