Strategic policy targets and the contribution of hydrogen in a 100% renewable European power system

The goal of European energy policy is to become climate neutral. The long-term energy strategies of various European countries include additional targets such as diversification of energy sources, maintenance of security of supply and reduction of import dependency. When optimizing energy systems, these strategic policy targets are often only considered in a rudimentary way and thus, an understanding of the corresponding interdependencies is lacking. Moreover, hydrogen is considered as a key component of a fully-decarbonized energy system, but its particular role in the power sector is still unclear due to low round-trip efficiencies.