Prysmian Wraps Up HVDC Test on COBRAcable

Prysmian Group has completed the HVDC test on the submarine interconnector COBRAcable that links The Netherlands and Denmark.

The announcement took place during the COBRAcable link’s official inauguration event, simultaneously held in Eemshaven (NL) and Endrup (DK).

Prysmian had secured this project in February 2016 with a contract awarded by TenneT TSO and Energinet SOV, operators of the Dutch and Danish power transmission grids, respectively.

The COBRAcable interconnector produces benefits for both Denmark and The Netherlands, ensuring a reliable energy supply in the two countries. It also contributes to the development of a sustainable international energy landscape, a key priority for the European Union, which is supporting the project through the EEPR (European Energy Programme for Recovery).

Prysmian supplied and installed a ±320 kV HVDC bipole system, using single-core cables with extruded insulation technology and running for a total route of around 325 km, from Eemshaven (NL) to Endrup (DK) via the German North Sea sector.

The project includes two onshore lengths of 1 km on the Dutch side and 25 km on the Danish side that will connect the two onshore converter stations, provided under separate contract by Siemens.

All submarine cables were produced in Arco Felice (Italy) and Pikkala (Finland), the group’s centres of technological and manufacturing excellence for this type of cables.

Land cables were produced in Gron (France), while telecom cables were manufactured in Vilanova (Spain) and Drammen (Norway).

COBRAcable is a very innovative and tight schedule turn-key project, standing out for its big cross-sections and the various construction methods and installation technologies used, which saw the employment of the Heavy-Duty Plough, Hydroplow and Vertical Injector depending on the local water depth and composition of the seabed.

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