TenneT has awarded a consortium of Jan De Nul Group and LS Cable & System contracts to supply and install high voltage cables for the grid connection of the Hollandse Kust Noord and West Alpha offshore windfarms
Jan De Nul Group is responsible for transportation, laying and protection of the cables that will be designed and manufactured by LS Cable & System. Offshore execution will take place in 2022-23.
The Hollandse Kust Noord and Hollandse Kust West Alpha export cable systems will consist of two 220-kV AC cable systems each. The four cable systems will cover a total length of 210 km, connecting the windfarms to the onshore Dutch power grid near Beverwijk, just north of the port of IJmuiden.
When operational, the windfarms will generate up to 1.4 GW.
TenneT Offshore project director Dick Lagerweij said, ”In Q3 2018 TenneT prepared the project documents for offshore cable installation. Five bidders were qualified to submit their proposals and in early 2020 we concluded that the consortium was best placed to be awarded the contract. We are aiming to complete the project as a whole by 2023.”
Jan De Nul will use its cable-lay vessel Isaac Newton, which will load the cables in South Korea and transport them to the Netherlands for installation, using a minimum number of offshore joints.
The company’s multipurpose support vessel Adhémar de Saint-Venant will execute the post-lay trenching work and the rock protection works at the subsea crossings.