Prysmian to connect Netherlands, Denmark with submarine power line

Energy and telecom cabling firm Prysmian Group, won a contract worth around $278 million for an high voltage direct current (HVDC) submarine interconnector that will link Denmark and the Netherlands, by TenneT TSO B.V. and Energinet.dk SOV, the operators of the Dutch and of the Danish power transmission grids, respectively.

The COBRAcable (“COpenhagen BRussels Amsterdam” cable) will provide benefit to the electricity grids of both countries involved, as it will make Dutch power capacity structurally available to Denmark and vice versa, increasing security of supply and enabling the further integration of renewable energy into the electricity grids.

The COBRAcable interconnector will therefore contribute to the realization of a sustainable international energy landscape, a key aim of the European Union, who is to support the project through the European Energy Program for Recovery. The connection will be constructed using HVDC technology, which minimizes transmission losses over the long distances involved.

The contract awarded to Prysmian involves the turn-key supply and installation of an HVDC bipole – using single core cables with extruded insulation technology – that will operate at a voltage level of ±320 kV with a rating of about 700 MW, equivalent to the annual electricity consumption of all households in the cities of Rotterdam and Amsterdam combined.

It will run along a total route of around 200 miles, from Eemshaven, The Netherlands, to Endrup, Denmark via the German sector of the North Sea, and will include two onshore lengths of 1,000 yards on the Dutch side and 15 miles on the Danish side to link to the onshore converter stations, which are to be provided under separate contract by Siemens.

All cables will be produced in Arco Felice (near Naples, Italy) and Pikkala (near Helsinki, Finland), the Group’s centres of technological and manufacturing excellence for submarine cables. Prysmian is currently building on recent investments made in its Pikkala factory with a further about $11 million upgrade to existing production lines, to increase its manufacturing capacity of extruded HV submarine cables.

The marine cable laying activities, which will be performed by the Group’s own cable-laying vessels, the Cable Enterprise and the Giulio Verne, will also see the use of their newly acquired barge. 

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