Stability analysis of an off-grid hybrid power plant for hydrogen production

Authors

  • A. Llamazares Department of Electrical Engineering EINA, Zaragoza University María de Luna 3 – Edificio Torres Quevedo – Campus Río Ebro –50018 Zaragoza (Spain) Author
  • S. Martín-Arroyo Department of Electrical Engineering EINA, Zaragoza University María de Luna 3 – Edificio Torres Quevedo – Campus Río Ebro –50018 Zaragoza (Spain) Author
  • A. Bestué Coarasa Department of Electrical Engineering EINA, Zaragoza University María de Luna 3 – Edificio Torres Quevedo – Campus Río Ebro –50018 Zaragoza (Spain) Author
  • M. García-Gracia Department of Electrical Engineering EINA, Zaragoza University María de Luna 3 – Edificio Torres Quevedo – Campus Río Ebro –50018 Zaragoza (Spain) Author

DOI:

https://doi.org/10.52152/4517

Keywords:

Off-grid hybrid system, grid stability, power plant control.

Abstract

A 500 kW off-grid hybrid system based on renewable energies (PV and Wind) is designed to produce green hydrogen. This energy system includes a Battery Energy Storage System (BESS) to improve the grid stability. To control the power plant two strategies are assessed. First, a variable-load control is applied to the electrolyser, while the BEES control (with hysteresis) ensures that the power is not less than the minimum admissible in the electrolyser. A second control is developed to minimize electrolyser degradation. In this case, the electrolyser operates at constant power, allowing only very slow voltage variations.

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Published

2025-07-25

Issue

Vol. 23 No. 6 (2025)

Section

Articles

License

Copyright (c) 2025 A. Llamazares, S. Martín-Arroyo, A. Bestué Coarasa, M. García-Gracia (Author)

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.