Withdrawal of first sea cable at HKW beta starts
The first sea cable for TenneT’s Hollandse Kust (west Beta) offshore wind farm will be retracted under the dunes near Velsen early next week.
Image source: TenneT (Photography: Jorrit 't Hoen)
The Netherlands, Velsen: Weather permitting, the first sea cable for TenneT’s Hollandse Kust (west Beta) offshore wind farm will be retracted under the dunes near Velsen early next week, on Monday and Tuesday. Because of this, several ships will appear off the coast in the coming days. With the two electricity cables that will be installed in the beach and seabed in the coming weeks, energy will soon be brought from the wind farm to land.
After the two successful drillings under the dunes, the conduits for the electricity cables are already in place. The first cable will be brought from the sea to the beach from the Giant 7 installation pontoon next week.
“After the cable has been brought ashore, it is pulled into the empty sleeve with a winch – which is located behind the dunes in the Sculpture Park,” says project manager Robert Koens on behalf of TenneT. “In the Sculpture Park, the three cores of the sea cable are connected in an underground socket with large terminal blocks to the electricity cables that have already been deployed on land. This is how the power comes out at our transformer station on Zeestraat in Wijk aan Zee.”
After retracting the first cable, contractor NBOS will bury the first kilometers of the electricity cable in the beach and at sea. Koens adds: “The cables are laid at depth using the cofferdams on the beach. The Giant 7 then pulls the cable burial machine towards itself again over the seabed. Using powerful water jets, the machine then creates a slot in the seabed where the cable sinks. This slot then closes automatically.”
After the burying of the first kilometers of the cable, NBOS will place the capped end on the seabed. The whole operation will be repeated for the second cable.
Source: TenneT
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