At first, this report explains the status quo of electricity generation in Europe as well as fundamental knowledge related to the term flexibility. Flexibility provision needs to meet
certain demands caused by different elements of power systems. This report also presents different flexibility options able to cover these demands for flexibility. Although all provide
individual advantages, this report identifies hydropower, especially pumped storage hydropower, to be a very flexible, diverse option and a technology capable of facing flexibility
challenges set by the increase of intermittent renewable energy sources.
Hydropower is especially common in the Nordic and Alpine countries and might provide flexibility. Assessments of future possibilities regarding this technology should therefore
consider hydropower located in these countries. In order to evaluate requirements for hydropower providing flexibility, factors are described, which are essential to the future
success of this possibility. As the future is subject to uncertainty, numerous outlines of the future European power system are available, designed by different parties involved in power
systems. This report examines existing scenarios on possible opportunities of hydropower based on the mentioned factors.
Finally, this report defines three scenarios, the Green Hydro, Reference and Prosumer scenario, which are specifically designed as suitable input for the following computational
simulations of the European power systems. To evaluate the possible profitability of hydropower and to achieve HydroFlex’s main objective, the scenarios describe different
contexts for Nordic hydropower.