Marine Warranty Surveyor Wanted for COBRAcable

Energinet.dk is looking to pre-qualify companies which will participate in a tender for a Marine Warranty Surveyor contract worth EUR 600,000 for offshore cable laying and cable protection at the COBRAcable interconnector that will link Denmark and the Netherlands.

Danish transmission system operator will pre-qualify 3-5 applicants who are evaluated as most qualified and only these applicants will be invited to submit a tender. Interested parties can apply until 13 February.

The COBRAcable, being developed by TenneT and Energinet.dk, will have a capacity of 700MW and will run from Eemshaven in the Netherlands, via the German sector of the North Sea to Endrup in Denmark. The interconnector will make Dutch capacity structurally available to the Danish electricity grid, and vice versa. It will also be designed in such a way as to enable the connection of an offshore wind farm at a later stage.

Prysmian is in charge of the turn-key supply and installation of an HVDC bipole cable – using single core cables with extruded insulation technology – that will operate at a voltage level of ±320 kV with a rating of approximately 700MW.

The interconnector will run along a total route of around 325 kilometres and will include two onshore lengths of 1 km on the Dutch side and 25 km on the Danish side to link to the onshore converter stations, which are to be provided under separate contract by Siemens.

Preparations for the construction of the converter stations at Eemshaven and Endrup have already started, with work on the construction of the cable due to start in mid-2017.

TenneT and Energinet.dk will also install a fibre-optic data link alongside the COBRAcable interconnector itself, in order to exchange the necessary information about the interconnection.

Offshore WIND Staff

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