COORDINATED OPERATION STRATEGIES FOR ELECTROLYZER UNITS IN OFF-GRID PHOTOVOLTAIC COUPLED HYDROGEN PRODUCTION SYSTEM

Li Fei; Hua Lei; Fang Yicheng; Ma Mingyao; Zhang Xing

doi:10.19912/j.0254-0096.tynxb.2024-1530

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (1) : 28-34. DOI: 10.19912/j.0254-0096.tynxb.2024-1530

COORDINATED OPERATION STRATEGIES FOR ELECTROLYZER UNITS IN OFF-GRID PHOTOVOLTAIC COUPLED HYDROGEN PRODUCTION SYSTEM

Li Fei¹, Hua Lei¹, Fang Yicheng², Ma Mingyao¹, Zhang Xing¹

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Abstract

Regarding issues such as inefficient operation due to electrolyzers operating outside optimal ranges and degradation of electrolyzer lifespan caused by frequent switching on/off under fluctuating photovoltaic conditions, this study first proposes a hybrid power allocation strategy based on the optimal operating range. This strategy utilizes an improve d TOPSIS method to select the optimal operating range for electrolyzers. Subsequently, a combined approach of sequential allocation and average allocation is employed to allocate the operating power of each electrolyzer, aiming to increase the average operating time within the optimal operating range and enhance the overall efficiency of the electrolyzer unit. Additionally, a strategy is introduced for coordinating the variable hysteresis-loop switching of electrolyzer units with underlying cyclic switching. By expanding the power hysteresis-loop range to tolerate power fluctuations and sequentially starting and stopping each electrolyzer, the aim is to reduce the total start-stop cycles of the electrolyzer unit and evenly distributes the start-stop cycles of each electrolyzer in the array, thereby extending the lifespan of the electrolyzer unit. Finally, the effectiveness of the strategy is verified through simulations.

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PV / hydrogen production / electrolyzer / hybrid power allocation / hysteresis-loop switching strategy / optimal operating range

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Li Fei, Hua Lei, Fang Yicheng, Ma Mingyao, Zhang Xing. COORDINATED OPERATION STRATEGIES FOR ELECTROLYZER UNITS IN OFF-GRID PHOTOVOLTAIC COUPLED HYDROGEN PRODUCTION SYSTEM[J]. Acta Energiae Solaris Sinica. 2026, 47(1): 28-34 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1530

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