The objective of the study Artelys has carried out was to provide recommendations to the ENTSOs on the way to account for interlinkages between gas and electricity during the project assessment phase. After a thorough analysis of the interlinkages between the gas and electricity sectors, and a discussion of the role of the scenario building phase, three key sources of interlinkages have been identified and studied: gas-to-power, power-to-gas and hybrid consumption technologies (e.g. hybrid heat pumps). The recommendations provided by Artelys include criteria related to each of these interlinkages.

In this study, Artelys has carried out a cross-sectoral evaluation of the capacity value of the European gas storage on behalf of Gas Infrastructure Europe (GIE). A joint model of the European gas and electricity systems in 2030 has been used to undertake this analysis, based on a scenario of the ENTSOs (TYNDP 2018 Sustainable Transition). The objective of the analysis was to assess the structural benefits of gas storage assets for the electricity security of supply. To do so, different scenarios have been simulated, with gas storage reduction ranging from 10% to 30% of their forecast capacity (in available volume, injection and withdrawal). The reduction of gas storage induces additional operational and investments costs in order to enable the system to meet the electricity and gas demands. A reduction of 30% of the European gas storage capacity has been found to induce the need for investments in more than 20 GW of flexible power plants. Finally, gas storage has been found to have a stabilizing effect on electricity prices.

At present, several interconnection projects between France and Great Britain propose to bring out the synergies and complementarities between the British and continental European power systems. This study, commissioned by the Commission de Régulation de l’Energie (French NRA), provides quantitative information on the value of a new interconnection project from a public interest point of view. Several scenarios have been established, with the aim of covering a set of possible changes in the European energy system that are consistent and contrasted. In addition, many sensitivity analyses have been carried out to evaluate the impact of key assumptions such as deployment of renewable energies, evolution of nuclear capacities, level of interconnection, etc. Considered over its entire lifetime, a new interconnection project between France and the United Kingdom does not appear to be relevant in any of the scenarios. The analysis revealed that two conditions are necessary to ensure the profitability of 1GW of additional capacity: strong surpluses in one of the two countries (e.g. RES or nuclear) and high production costs for the gas and coal power plants.