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Optimization of electro-hydrogen energy storage configuration in off-grid wind-solar-hydro complementary systems

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  • Yang, Shaomei
  • Luo, Yuman
  • Wu, Tianyu

Abstract

Due to the volatility and uncertainty of renewable energy, the stability of off-grid systems is challenged in wind-solar-hydro complementary systems. To improve power supply reliability and reduce system costs, this paper proposes an optimized configuration method for electro-hydrogen energy storage. By using the Weighted Directional Synchronous Backward Reduction method, multiple typical daily load and generation scenarios are constructed, and the Improved Complete Ensemble Empirical Mode Decomposition with Adaptive Noise technique is applied to differentiate high and low-frequency power fluctuations, enabling precise regulation of the energy storage system. The capacity of the energy storage system is optimized using the Dung Beetle Optimization algorithm. Simulation results show that, compared to conventional methods, the proposed approach improves power supply reliability by up to 4.4 % in transitional seasons and reduces system cost by as much as 24 %. Furthermore, under extreme climate conditions, the model maintains power supply reliability above 97.7 %, demonstrating robust performance across varying seasonal and meteorological scenarios.

Suggested Citation

  • Yang, Shaomei & Luo, Yuman & Wu, Tianyu, 2025. "Optimization of electro-hydrogen energy storage configuration in off-grid wind-solar-hydro complementary systems," Energy, Elsevier, vol. 332(C).
    • Handle: RePEc:eee:energy:v:332:y:2025:i:c:s0360544225028634
    DOI: 10.1016/j.energy.2025.137221
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