Optimal Scheduling of Photovoltaic-Hydrogen System via Improved Rotation Strategy

Green hydrogen is receiving considerable attention as an effective energy carrier for achieving sustainable development goals. However, the high production costs and intermittency of renewable energy output pose challenges to hydrogen production. Various electrolyzer control methods have been proposed to enhance the efficiency of electrolyzers. Traditional control methods may lead to significant differences in electrolyzer wear in large-scale hydrogen production systems. Therefore, this paper proposes an improved rotation strategy aimed at mitigating electrolyzer switch fluctuations, improving hydrogen production efficiency, and effectively managing electrolyzers in photovoltaic (PV)-hydrogen systems. Research results demonstrate that the hydrogen production of this method is 2455936.58 Nm
³
in 3 months, which is 3.14% and 4.83% higher than that of the simple start-stop and rotation strategies, respectively. Meanwhile, the number of switch action times was reduced by 9.58% and 19.56% respectively. These results demonstrate the effectiveness of the proposed approach in significantly increasing hydrogen production and improving the economic viability of PV-hydrogen systems.