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Öresund cables

Replacement of Öresund cables

In Öresund, between Kristinelund in Sweden and Skibstrupgård in Denmark, lie two 400 kV cables. The cable connections were laid in 1973 and 1985, to allow alignment of the power system between Sweden and Denmark. We will now replace the oldest of the two.

About Öresund cables

Since the cable has been in the water a long time you can now see that there has been corrosion of the armor on one of the 400 kV cable connections. The armor is the protection that exists around the cables and damage to the armor can lead to failure. An error on this cable would lead to prolonged disruptions and limited transmission capacity on the link between Sweden and Denmark. The cables also contain oil that could leak out into Öresund if damaged.

A new cable connection in the old route

Svenska kraftnät will now, together with our Danish counterpart, as a preventive measure replace the damaged 400 kV cables with new cables. The new cable connection should have the same access points and use the same route as the existing one. Minor changes to the route may be necessary to meet regulatory requirements regarding environmental concerns and ancient monuments both in Sweden and in Denmark.

Time plan

The replacement is planned to take place during 2020 and contractors are a consortium consisting of NKT HV Cables AB and VBMS B.V.

Trenching Trials tests early in July

Trenching Trial tests of the cable are planned in July. The test are done in order to adjust the settings of the trenching tool, evaluate the methodic and to ensure that the cables are protected. The trials are planned to be executed July 5th, depending on the weather.