Objective Photovoltaic hydrogen production is an effective way to achieve large-scale utilization of solar energy resources while providing green hydrogen for downstream industries. By combining green hydrogen with the hydrogen-powered transportation, carbon emissions can be significantly reduced. Consequently, the integrated photovoltaic power to hydrogen and refueling (IPp2HR) system has attracted attention. However, as an emerging industry that couples power systems, control systems, and chemical processes, the IPp2HR system requires an energy management system (EMS) capable of ensuring both efficient and economical operation. However, achieving compatibility between conventional EMSs and the on-site communication and control frameworks of actual IPp2HR engineering projects remains a significant challenge.

Method To address this issue, this paper took an integrated demonstration project of "Renewable Energy-based Hydrogen Production and Refueling" as an example. It developed a communication framework for data exchange among devices, designed a two-layer EMS, comprising day-ahead/rolling and real-time layers, that was compatible with on-site equipment, and deployed it in the station control system. By implementing an operation strategy based on coordinated data interaction, the system achieved effective utilization of photovoltaic energy.

Result Experimental results demonstrate that the EMS effectively controls electrolyzer operation to follow photovoltaic fluctuations, reducing curtailment and avoiding excess power purchases.

Conclusion  The proposed EMS framework not only ensures a stable hydrogen supply for hydrogen-powered transportation but also enhances the operational economic performance of the overall system.