Pre-investigation of water electrolysis for flexible energy storage at large scales: The case of the Spanish power system

Thus, we explore a novel aspect of the 'hydrogen economy' which is based in the potentials of existing power systems and the properties of hydrogen as energy carrier, by considering the electricity generation and demand globally and determining the optimal size and operation of the hydrogen production processes along the country; e.g. the cost production of hydrogen becomes viable for a base-load scenario with 58 TWh/year of power surplus at 0.025 €/kWh, and large number electrolyzer plants (50 MW) running in variable mode (1-12 kA/m2).