Interaction of hydrogen infrastructures with other sector coupling options towards a zero-emission energy system in Germany

The flexible coupling of sectors in the energy system, for example via battery electric vehicles, heating or fuel production, can contribute significantly to integration variable renewable electricity generation. For implementation system transformation, however, there are numerous options design sector coupling, each which is accompanied by different infrastructure requirements. This paper presents extension REMix modelling framework include gas and its application investigating cost-optimal Germany's system. Considering an integrated optimisation all relevant technologies their capacities hourly use, a path climate-neutral 2050 analysed. We show that needed perform functions. Even though electrolytic production hydrogen takes on very dominant role 2050, it does not displace other technologies. Hydrogen also plays central seasonal balancing generation demand. Thus, large-scale underground storage part optimal addition transport network. These results provide valuable guidance transformation Germany.