Benefit analysis of electricity interconnections between France and the United Kingdom

The aim of this study is to provide a quantitative and qualitative analysis informing decision-making on the development of new electricity interconnections between France and Great Britain. The economic benefits associated with a new interconnection project are estimated via the increase in social welfare brought about by the commissioning of this new interconnection. The expected gains in terms of security of supply are also assessed. These benefits are evaluated for the years 2030, 2040 and 2050. The future evolution of the power generation and capacity mix, energy demand and infrastructure cannot be known with certainty. Several scenarios and variants are therefore studied (including different assumptions about renewable energy deployment, nuclear capacity, interconnection levels, etc.) in order to identify the opportunities and risks associated with an increase in electricity interconnection capacity between France and Great Britain.