How it Works
AQUIND Interconnector is comprised of three principal elements, being the onshore elements in Great Britain, the marine elements between the UK and French coastlines and the onshore elements in France.
UK onshore elements
- Works at the existing National Grid Lovedean substation in Hampshire where AQUIND Interconnector will connect to the existing GB grid;
- Underground alternating current (‘AC’) cables, connecting Lovedean substation to the proposed nearby converter station;
- The construction of a converter station comprising a mix of buildings and outdoor electrical equipment. The building roofline will vary in height but will be approximately 22 m at its peak, and may also include lightning masts;
- Two pairs of direct current (‘DC’) cables with one fibre optic cable of smaller diameter per pair of cables for data transmission from the proposed landfall site in Eastney (near Portsmouth) to the converter station at Lovedean. The cables will be approximately 20 km in length and the intention is to locate the cables within existing highway or road verges where practicable.
French onshore elements
- Works to an existing substation at Barnabos, to be carried out by Reseau de Transport d’Electricite (‘RTE’);
- AC cable planning, installation and connection, undertaken by RTE;
- The construction of a converter station near Barnabos, which will be similar in nature to the UK equivalent;
- Two pairs of underground high voltage direct current cables together with smaller diameter fibre optic cables for data transmission (one for each pair of electric cables) from the landfall on the French shore to the newly built converter station near Barnabos substation, approximately 35 km in length. It is proposed that the landfall site in France will be near Dieppe or Pourville-sur-Mer, with the exact location to be confirmed subject to further environmental and technical assessments.
- Four marine cables between England and France, which can be bundled in pairs, and a smaller diameter fibre optic cable per pair of marine cables for data transmission. The marine cable route can be divided into the following sections:
– Approximately 47 km within the UK territorial limit, i.e. 12 nautical miles from the mean high water mark;
– Approximately 53 km from the UK territorial limit to the boundary of the Exclusive Economic Zone (‘EEZ’);
– Approximately 58 km from the boundary of the EEZ to the French territorial limit;
– Approximately 29 km within the French territorial limit, i.e. 12 nautical miles from the mean high water mark.