The Impact of Providing Balancing Services with Electrolyzers on Power and Hydrogen Balancing Responsible Groups.

Renewable energy sources coupled with flexible technologies are highly important for mitigating climate change and reducing dependence on import fuels. Joint operation of these resources can enable stable transition to a green and renewable energy system. This paper considers a plant consisting of a battery storage, an electrolyzer, and a photovoltaic power plant, which is connected to the electric power system, where it can inject and extract power, and the hydrogen system, where it can inject hydrogen. It can trade in both the power and the hydrogen day-ahead markets and can provide balancing services to both system operators. Providing balancing services in either of the two systems creates an impact on the other system, primarily causing an imbalance. This paper presents an accurate model of such power plant and analyzes the significance of the interaction between the two energy vectors.