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This paper examines the differences in performance degradation between alkaline (AEL) and proton exchange membrane electrolyzers (PEMEL) in hybrid energy storage systems under a frequency-segregated control strategy. A MATLAB/Simulink model incorporates differentiated degradation mechanisms: AEL degradation is characterized by a start-stop frequency-dependent piecewise voltage degradation model, while PEMEL degradation correlates with power fluctuation amplitude via dynamic current-induced membrane thickness variation. The proposed strategy suppresses >0.5 Hz fluctuations using energy storage to mitigate PEMEL losses while optimizing AEL start-stop frequency through <0.5 Hz power allocation. Numerical validation confirms that 0.5 Hz segregation frequency leads to (1) a 48% reduction in AEL start-stop cycles, (2) a 52% decrease in the standard deviation of PEMEL power fluctuation, and (3) a 45% decline in system voltage degradation magnitude. Sensitivity analysis across frequency thresholds confirms control parameter impacts, establishing a theoretical foundation for lifespan optimization in hybrid electrolyzer systems.

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Impact of Frequency-Splitting Control on Alkaline/PEM Electrolyzer Performance Degradation in Hybrid Electrolysis-Energy Storage Systems

  • 会议论文

  • 发表日期：

    2026年

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  • Hongqiang Li,
  • Xutao Li,
  • Ningbo Zhang,
  • Jiahao Hu,
  • Qingjie Sun,
  • Fuqiang Jiang,
  • Yiwei Qiu

摘要

This paper examines the differences in performance degradation between alkaline (AEL) and proton exchange membrane electrolyzers (PEMEL) in hybrid energy storage systems under a frequency-segregated control strategy. A MATLAB/Simulink model incorporates differentiated degradation mechanisms: AEL degradation is characterized by a start-stop frequency-dependent piecewise voltage degradation model, while PEMEL degradation correlates with power fluctuation amplitude via dynamic current-induced membrane thickness variation. The proposed strategy suppresses >0.5 Hz fluctuations using energy storage to mitigate PEMEL losses while optimizing AEL start-stop frequency through <0.5 Hz power allocation. Numerical validation confirms that 0.5 Hz segregation frequency leads to (1) a 48% reduction in AEL start-stop cycles, (2) a 52% decrease in the standard deviation of PEMEL power fluctuation, and (3) a 45% decline in system voltage degradation magnitude. Sensitivity analysis across frequency thresholds confirms control parameter impacts, establishing a theoretical foundation for lifespan optimization in hybrid electrolyzer systems.