How it Works
The main components of the project will include subsea and underground cables together with new converter stations in both the UK and France.
Subsea & Underground Cables
The subsea cable route will run from Eastney in the UK to Normandie in France. The onshore element of the underground cable route will connect the subsea cable from its landing points on either side of the Channel to new converter stations at Lovedean in the UK and Barnabos in France. Underground cables will also connect the new converter stations to nearby existing substations.
The Cable Route
Four high-voltage direct current subsea cables will cover the distance of approximately 190km between Eastney near Portsmouth and Normandie in France. On the UK side, underground cables will connect the subsea cables from the landing point at Eastney to a new converter station less than 20km away at Lovedean in Hampshire. Fibre optic data transmission cables of a smaller diameter will be installed together with the DC cables.
The Converter Stations
Converter stations are required in both the UK and France to convert electricity from Direct Current (DC) to Alternating Current (AC). The GB and French electricity grids use AC, while DC is used for sending electricity along the high-voltage subsea and underground cables because it is more efficient to transmit electricity as DC over large distances.