The electricity from the Thor offshore wind farm, which is being built in the North Sea off Nissum Fjord, is now ready to be connected to the electricity grid via a 31-kilometer-long 220 kV cable connection between Idomlund near Holstebro and Volder Mark near Lemvig.
24 of the 31 kilometers of cable have been buried, and two routes with three cables in each have been established. This has required 126 cable drums weighing up to 27.5 tons. In addition, seven kilometers of controlled undercutting with six traction pipes in each, corresponding to 42 kilometers of pipeline. The work was carried out by NCC's Jakobsen & Blindkilde for Energinet, the construction company said in a statement.
- It has been a very exciting project, where we have used several of our special skills in the process, but where we have also gained more experience along the way. This is a project with many stakeholders and a cable installation that must be carefully planned so that the entire production from start to finish is coherent. At times, our construction site has stretched over an area of 10 km, and it is important that we have control of our agreements and processes, says Dirch Christian Hald, project manager at Jakobsen & Blindkilde under NCC Infrastructure.
When the cables from Thor Offshore Wind Farm are connected to the electricity grid, Energinet takes over. The approximately 11,500 road plates that have made the work possible in the fields are reused on other construction sites. NCC has been the main contractor with Danboring as a subcontractor for the guided underboring, while Energinet has been the client.
- The cables connect the upcoming offshore turbines to the electricity grid and thus ultimately the consumers. Electricity infrastructure may not always be such a visible part of the green transition. The cables are also buried in the ground between Volder Mark and Idomlund, which is a new, large hub in the high-voltage grid – but electricity connections are absolutely crucial for us to create an electricity system with more renewable energy and transport, for example, electricity produced at sea around the country, says Martin Hinrichsen, Chief Project Manager at Energinet.
The Thor Offshore Wind Farm is expected to be fully operational by 2027 at the latest.
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