#SPEEKO TECH NSL INSTALL#
Nexans, a French cable and optical fibre company, was selected to supply and install approximately 500km of mass impregnated non-draining (MIND) HVDC cables for the fjord, tunnel and lake sections, as well as the onshore section in Norway. Italian electrical cable supplier Prysmian was contracted to supply and install 950km of mass impregnated (MI) paper insulation HVDC submarine and land cables, which will be manufactured at its Arco Felice factory in Naples, Italy. Contractors involved in the North Sea Link project The converter station will be connected to the national grid using existing facilities, which will require minor upgrades and modifications. It will then be submerged across Suldalsvatnet and further be placed in a trench stretching from the shoreline to the converter station, located adjacent to an existing hydropower plant in Kvilldal. The onshore cable in Norway will pass through a micro tunnel and a conventional tunnel from Hylsfjorden to lake Suldalsvatnet. It will use 220t transformers that were manufactured in Sweden by ABB Transformers Ludvika. The GIS substation is proposed to be constructed adjacent to the existing Blyth substation. The converter station will be connected to the new gas-insulated switchgear (GIS) substation, proposed to be built and operated by National Grid Electricity Transmission (NGET), via six 400kV HVAC cables. The buildings will rise to a height of no more than 25m. The converter station and ancillary buildings will be constructed with steel frames and clad with metal. The converter station will cover an area of approximately 5ha near Brock Lane in East Sleekburn. In the UK, the project will involve the excavation of a transition joint pit (TJP) at Cambois, south of the River Wansbeck, through which the subsea cables will be connected to the HVDC onshore underground cables. Onshore elements of the UK-Norway subsea interconnector The two parallel, 720km cables between Cambois, Northumberland and Kvilldal are expected to be completed in 2021. The cables will operate at a voltage level of ±525kV with a rating of 1,400MW.Ĭable is also being laid from the fjords in Suldal to the North Sea. The 2.8km parallel subsea cables were installed from a 43m x 15m platform, working at depths of up to 210m.
In 2018, NSL installed 270km of HVDC cables in English waters, including two parallel cables from Cambois beach to approximately 65km offshore. The interconnector will stretch from Blyth in Northumberland, UK, to Kvilldal in Rogaland, Norway.
As part of the European Commission’s Projects of Common Interest (PCIs), the project received a €31m ($34m approximately) grant to support the early-stage engineering studies. The overall investment in the project is estimated to be €2bn ($2.2bn).
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