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Renewable energy

Renewable Energies Gain Ground as Net-Zero Carbon Power Suppliers

Strategic Insights

— 2 min read

Renewable energies are being increasingly adopted as sustainable power sources, gradually replacing fossil fuels in the quest for a net-zero carbon future. A recent study, backed by prominent financial supporters, highlights the importance of energy storage systems as complementary solutions to the intermittent nature of renewable energies. The research focuses on hydrogen storage systems, specifically exploring the prediction of system instabilities caused by interactions between DC grids and electrolyser and fuel cell DC/DC converters.

Key Takeaways:

  • The study emphasizes the crucial role of energy storage systems in stabilizing the grid when renewable energies are used as net-zero carbon power suppliers.
  • Hydrogen storage systems are identified as a promising option for future multi-energy DC power systems, offering a stable and efficient storage solution.
  • The research proposes a small-signal admittance-based model of the electrolyser circuit of hydrogen storage systems, which is validated using MATLAB/Simulink time-domain and OPAL-RT real-time simulations.
  • The model and stability results indicate that the positive-mode-damping stability criterion is an effective method for assessing stability in large multi-energy DC power systems.
  • The study explores the influence of electrolyser circuit and multi-energy DC grid parameters on oscillatory instabilities, providing essential insights for the design and operation of hydrogen storage systems.
  • The research involves a team of authors from the Universitat Politecnica de Catalunya, led by Oriol Cartiel, who is affiliated with the Department of Electrical Engineering (DEE) at the Escola Tecnica Superior d'Enginyeria Industrial de Barcelona (ETSEIB).
  • The study is published in the International Journal of Electrical Power & Energy Systems, a peer-reviewed journal published by Elsevier.

Statistics:

  • The study focuses on hydrogen storage systems, which are being considered as a promising option for future multi-energy DC power systems.
  • The research involves the development and validation of a small-signal admittance-based model of the electrolyser circuit of hydrogen storage systems using MATLAB/Simulink time-domain and OPAL-RT real-time simulations.
  • The study explores the resonance and damping frequency regions of electrolyser circuits, as well as the influence of electrolyser circuit and multi-energy DC grid parameters on oscillatory instabilities.
  • The research highlights the importance of the positive-mode-damping stability criterion as a friendly frequency-domain method for assessing stability in large multi-energy DC power systems.
  • The study is published in the International Journal of Electrical Power & Energy Systems, Vol. 170, with the DOI 10.1016/j.ijepes.2025.110899.

Sources:

  • Small-signal admittance electrolyser circuit model for stability studies of multi-energy DC grid-connected hydrogen systems. International Journal of Electrical Power & Energy Systems, 2025,170():110899.
  • Universitat Politecnica de Catalunya, Barcelona, Spain, Europe, Gases, Elements, Hydrogen, Inorganic Chemicals, Electrical Power and Energy Systems.
  • NewsRx. Study Findings from Universitat Politecnica de Catalunya Provide New Insights into Electrical Power and Energy Systems (Small-signal admittance electrolyser circuit model for stability studies of multi-energy DC grid-connected hydrogen systems). Energy Weekly News. September 12, 2025; p 429.

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