This report includes case studies, network data, and scenarios that will be utilised in future activities, such
as network design and optimisation, as well as the analysis of operational strategies for hydrogen injection
into the gas grid. There are three high-pressure networks operated by TSOs in Spain, Norway, and Italy,
along with two low-pressure networks managed by DSOs in Spain and Italy. In addition to these real-world
networks, the report offers simplified test networks for evaluating the functionality, accuracy, performance,
and robustness of the software developed in this project. The final section presents an overview of various
gas network simulation tools used by TSO and DSO partners.
