Nexans awarded turnkey contract to supply power export cables for Scotland’s Seagreen offshore windfarm project
11 June 2020
3 min
Nexans Aurora at Seagreen wind farm project
  • Nexans subsea and land cables will provide power for up to 1 million Scottish homes helping the UK achieve its clean energy targets.
  • Project for SSE Renewables confirms Nexans’ position as a key strategic partner in the global energy transition.
  • Contract is part of Nexans’ current €1.6bn order backlog for subsea cable projects.
  • The subsea export cables will be installed by Nexans’ new Aurora cable laying vessel.

Nexans has been awarded a major contract by SSE Renewables to design, manufacture and install the high voltage (HV) onshore and offshore export cables for the Phase 1 development of the Seagreen offshore wind farm project. Construction on the 1,075 megawatt (MW) project, which is located 27km off the coast of Angus, will start next year. When completed in 2022/23 Seagreen 1 will be Scotland’s largest wind farm and single largest source of renewable energy, providing a significant contribution to Scotland’s net zero ambition and enough clean, renewable energy to power 1 million homes.

We are pleased to have Nexans expertise on the Seagreen project as Nexans is a world leader in the supply and installation of subsea power cables.

John Hill

Project Director, Seagreen

Nexans’ factory in Charleston, US will supply the three 65 km offshore export cables. This factory was recently expanded to manufacture HV subsea power cables and is currently the only facility with that capability in North America. The three 20 km onshore export cables for the project will be manufactured at Nexans’ factory in Charleroi, Belgium.

Nexans is committed to working closely with suppliers local to the Seagreen project on subcontract opportunities available, including both the offshore and the land part of the contract.

The export cables for the Seagreen offshore windfarm project will be installed by the Aurora, Nexans’ brand new cable laying vessel (CLV).The Aurora is currently under construction and will be delivered in the second quarter of 2021.

We are delighted to receive this contract from SSE Renewables and we are excited to help bring the biggest windfarm in Scotland to life. This confirms Nexans’ position as a strategic partner highly involved in the global energy transition.

Ragnhild Katteland

Former EVP for the Subsea and Land System Business Group, Nexans

The electricity generated by the Seagreen turbines will be transmitted via the subsea export cables to landfall at Carnoustie. Once ashore, the land cables will transmit the electricity to a new substation at Tealing where it will feed in to the UK’s national electricity transmission system.

Nexans wins major subsea HVDC cable contract from Greece’s Ariadne Interconnection S.P.S.A
27 May 2020
3 min
Crete - Attica, Greece
  • The new interconnection will enable Crete’s renewable energy transition by providing a one gigawatt (GW) link between the island Crete and Greece’s mainland network.
  • Nexans will design, manufacture and lay 335 kilometers of subsea HVDC cable at water depths down to 1,200 meters.
  • Contract value exceeds €220m and is part of Nexans’ current €1.6bn order backlog for subsea cable projects.

Nexans has been awarded a major contract to design, manufacture and install a 335km subsea high voltage direct current (HVDC) cable system for Ariadne Interconnection S.P.S.A, owned 100 percent by IPTO, Greece’s state grid operator. The interconnection will link the electricity network on mainland Greece to Crete. The project will provide security of supply for the island and enables the transition from fossil fuel generation to renewable wind and solar energy resources.

Crete is the largest of the Greek islands, with a population of around 700,000 people. It also attracts over 4 million visitors a year, mainly during the summer. The island currently relies mainly on out-dated fossil fuel generation. The new submarine cable interconnection will ensure that Crete has a reliable power supply essential for its future prosperity. The interconnection will also reduce emissions, making the island even more attractive to tourists, and also helping it to develop its own renewable energy resources by enabling excess generation to be exported back to the mainland.

The cable will span a subsea distance of 335 km from the Attica region on the Greek mainland to the Herakleion area in Crete. Over a 35-month project, Nexans will provide one 500 megawatt (MW) HVDC subsea cable system to form half of the total 1,000 MW bipole interconnection.

The Nexans cable, rated at 500,000 Volt, is based on its well-proven mass impregnated nondraining (MIND) design for HVDC cable systems and will integrate fiber optic elements for sensor applications. The near-shore sections of the cable, to be installed at water depths down to 100 meters, will feature an aluminium conductor core with a cross-section of 1,800 mm². The deeper sections of the cable, installed at depths down to 1,200 meters, will feature a 1,500 mm² crosssection aluminium conductor. The cable will be protected by trenching into the seabed using the Nexans Capjet water jetting system down to 600 meters water depth.

The HVDC cable will be manufactured in the Nexans plant in Halden, Norway and/or the plant in Futtsu, Japan. It will be installed by one of Nexans’ own dedicated cable vessels – Nexans Skagerrak or new Nexans Aurora. The interconnection is scheduled to come on line in 2023.

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