Van Oord installs inter-array cables at Hollandse Kust Noord
Van Oord has completed installing and burying inter-array cables at CrossWind's Hollandse Kust Noord offshore
wind farm in the Dutch North Sea.
Van Oord's cable-laying vessel Nexus and trencher Dig-It, a remotely-operated vehicle operated from Subsea
Viking, have installed a web of 69 inter-array cables measuring 140 kilometres in total.
The offshore wind farm is located 18.5 kilometres off the coast of the Netherlands, near the seaside resort of
Egmond aan Zee.
Van Oord designed a 66 kV inter-array grid for the Hollandse Kust Noord offshore wind farm. Dutch manufacturer
TKF (Twentsche Kabelfabriek) supplied the cables. Nexus, equipped with a large 5,000 tonnes capacity cable
carousel, installed the inter-array cables.
Trencher Dig-It subsequently buried the cables to the required depth of between 1 and 1.5 metres. The Dig-It, a
Tracked Remotely Operated Vehicle (TROV), can be used for burying cables both in “jetting mode” for sandy
soils and in “chain cutter mode”' for harder soils. At the Hollandse Kust Noord project, both modes were used
successfully, Van Oord said.
Crosswind, a joint venture between Shell and Eneco, contracted Van Oord for the complete Balance of Plant
scope for the construction of the offshore wind farm. As a Balance of Plant contractor, Van Oord's activities
encompass the design, engineering, procurement, and transport and installation of the wind turbine foundations,
the inter-array cables, as well as the transport and installation of the wind turbines themselves.
Earlier this year, Van Oord completed the installation of all 70 monopile foundations at the wind farm. Currently,
Van Oord is deploying two offshore installation vessels to install the wind turbine generators and is also
performing the electrical termination works of the cables in the wind turbine generators.
While construction is still in full swing, the Hollandse Kust Noord offshore wind farm already produced its first
megawatt hours of green electricity and delivered it to the Dutch mainland.
In the coming months, production capacity will be constantly increased. Once finished later this year, the wind
farm will have a total installed capacity of 759 MW, generating at least 3.3 TWh per year. This is enough
renewable electricity to meet 2.8 per cent of the Netherlands' electricity demand.