Small-signal admittance electrolyser circuit model for stability studies of multi-energy DC grid-connected hydrogen systems
Renewable energies are increasingly being used as net-zero carbon power suppliers, replacing fossil fuels. Simultaneously, energy storage systems are emerging as complementary solutions to the intermittent and uncertain nature of these energies. In particular, hydrogen storage systems are being noti...
| Autores: | , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/446103 |
| Acceso en línea: | https://hdl.handle.net/2117/446103 https://dx.doi.org/10.1016/j.ijepes.2025.110899 |
| Access Level: | acceso abierto |
| Palabra clave: | Electrolyser Hydrogen storage systems Multi-energy DC grids Positive-mode-damping stability criterion Small-signal admittance-based model Àrees temàtiques de la UPC::Energies::Eficiència energètica |
| Sumario: | Renewable energies are increasingly being used as net-zero carbon power suppliers, replacing fossil fuels. Simultaneously, energy storage systems are emerging as complementary solutions to the intermittent and uncertain nature of these energies. In particular, hydrogen storage systems are being noticed as a promising option for future multi-energy DC power systems. One of the primary research topics regarding hydrogen storage systems is the prediction of system instabilities caused by interactions between DC grids and electrolyser and fuel cell DC/DC converters when hydrogen storage systems are connected. Frequency-domain methods are the most suitable to assess stability in large multi-energy DC power systems. Notably, the positive-mode-damping stability criterion is a friendly frequency-domain method that offers several benefits over techniques such as the generalised Nyquist criterion. The present paper contributes a small-signal admittance-based model of the electrolyser circuit of hydrogen storage systems. Using the proposed model, it analyses the resonance and the damping frequency regions of electrolyser circuits of hydrogen storage systems, and studies the influence of electrolyser circuit and multi-energy DC grid parameters on oscillatory instabilities by the positive-mode-damping stability criterion. The model and stability results are validated using MATLAB/Simulink time-domain and OPAL-RT (OPAL-RT4512) real-time simulations. |
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