SupraMarine consortium formed by leading European players to launch an innovation project

The cutting-edge technology demonstrator would represent a breakthrough in energy transmission from offshore wind farms by adapting and simplifying part of the electrical grid connection. The SupraMarine project would offer an alternative solution to the growing offshore wind energy supply chain challenges, while sourcing most of its materials from Europe. The project is key to developing a subsea superconducting system, which will ultimately strengthen the competitiveness of offshore wind energy far from the coast.

The SupraMarine consortium relies on leading European players that bring complementary expertise to the project:

• Air Liquide will supply the cryogenic plants featuring its Turbo-Brayton technology, crucial for maintaining the superconducting state of the cables, and will also conduct in-depth studies on the system’s thermal performance and oversee its cryogenic operations;
• CentraleSupélec, through GeePs laboratory (Université Paris-Saclay, Sorbonne Université, CNRS, CentraleSupélec) will bring its expertise ranging from experimental platforms to doctoral research student training to overcome key scientific barriers;
• ITP Interpipe will design the highly-insulated rigid Pipe-in-Pipe cryostat envelope, a key element that safeguards the superconducting state of the cables and underpins the overall performance of the system;
• Nexans, as the leading innovator in superconducting cables and systems, will ensure the development of the advanced HVAC superconducting cables, junctions and terminations;
• RTE will provide its insights as a leading grid operator, ensuring the research aligns with real-world grid integration requirements.

The testing of the demonstrator is planned by 2028.

The SupraMarine project was awarded a grant of €7.3 million.

This project is funded by the French State as part of France 2030 operated by ADEME.