Development and experimental validation of the dynamic model of an electrolyser for its integration with renewable generation

In this paper a dynamic model of a Proton Exchange Membrane or Polymer Electrolyte Membrane (PEM) electrolyser is built and validated. The model includes the electrochemical domain to describe the evolution of the voltage as a function of the input power, operating temperature, and pressures of hydrogen and oxygen, and the thermal domain to analyse the evolution of the temperature as a function of the input power, voltage and ambient temperature. The model is based on phenomenological equations and on the adjustment of parameters based on experimental data of a 1 kW PEM electrolyser. Equation implementation, model simulation and validation are performed with MATLAB/Simulink software. For data collection, experimental data obtained in the laboratory are used. This model can be used for the design of energy management systems in renewable hydrogen production facilities, facilitating the integration of green hydrogen in future grids.