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Low carbon HVDC cables to be installed on Dogger Bank C

22nd September 2022 in Press releases, Project news, Supply Chain

NKT is set to produce low-carbon copper cables for the third phase of the world’s largest offshore wind farm, significantly reducing the project’s carbon footprint during construction.

NKT, its supplier and customers have entered into an agreement to use low-carbon copper for the 320 kV HVDC cables the company is delivering to the third phase of the wind farm, known as Dogger Bank C.

The use of low-carbon copper will reduce the carbon footprint of the HV cable systems by more than 23 000 metric tons of CO2 (1), which is equivalent to 7,700 average family cars driven for one year (2).

Following a preferred supplier agreement announced in 2020, Dogger Bank Wind confirmed NKT as the main contractor for delivery and installation of high-voltage DC (HVDC) onshore and offshore export cable systems for Dogger Bank C in June 2021.

Simon Bailey, Commercial Director for Dogger Bank Wind Farm at SSE Renewables said:

“Along with our partners Equinor and Eni Plenitude, we are constantly looking at ways to reduce carbon emissions as much as possible throughout the construction process. It is fantastic that our HVDC export cable supplier, NKT, will use a low-carbon copper, which will significantly reduce the carbon footprint of the construction works on Dogger Bank. The HVDC cable is a crucial component, as it will connect power generated from the windfarm to the national grid.”

Alexander Kara, President & CEO of NKT said:

“This pioneering cooperation with our customers and suppliers enables us to produce even more sustainable cables using low-carbon copper. I am pleased that we have set up this game changing collaboration, so we can continue contributing to connecting a greener world. This will ultimately help us meet our sustainability commitments, including becoming a net-zero emission company.”

The low-carbon copper cathodes come from the Boliden Aitik mine in Northern Sweden. Vehicles in the mine and the smelters are powered by fossil free electricity and the delivery of copper cathodes is done domestically by electric train from the mine to Elcowire in Helsingborg that in efficient processes then produces the low-carbon copper wires.

The use of low-carbon copper will significantly reduce the carbon footprint of NKT’s cables as it comes with less than half the carbon footprint of standard copper, which has been third-party validated The manufacturing of the high voltage cables takes place in NKTs factory in Karlskrona in Sweden, which is running on 100 % renewable electricity.

Installation of the cable system at Dogger Bank C in the North Sea will be done by NKT Victoria, one of the world’s most advanced and fuel-efficient cable laying vessels.

(1) Low-carbon copper from Boliden has a carbon footprint of less than 1,5 kg CO2eq/kg of copper, which is significantly lower than the European average of 4,1 kg CO2eq/kg of copper.

(2) Gasoline-powered family cars. Source: EPA-United States Environmental Protection Agency.