NordBalt cross-border transmission

NordBalt is a joint project of the Swedish and Lithuanian TSOs (transmission system operators) Svenska kraftnät and Litgrid AB. It is part of Lithuania’s long-term strategy to secure its energy independence by interconnecting the power grids of the Baltic countries with other grids. It also strengthens the power supply in southern Sweden. 

The interconnection enables the emerging electricity market of the Baltic countries to integrate with other electricity markets. This improves competition and provides alternative sources of electric power. 

The sea crossing calls for a secure and environmentally friendly HVDC cable system installation for connecting the transmission systems. This is important since the cable route passes through former mined areas and explosives dumping grounds as well as a Natura 2000 nature protection area on the Lithuanian side. 

The cable system with submarine and underground cables offers several special features and compelling environmental benefits, including low losses, network stability, neutral electromagnetic fields, oilfree cables and minimal visibility. It is also designed for integration into a future pan-European grid. 

The cable system has a power rating of 300 kV. It comprises a 2x400 km long HVDC submarine cable across the Baltic Sea, a 2x40 km HVDC underground cable to Nybro on the Swedish side and a 2x13 km VDC underground cable to Klaipeda on the Lithuanian side. At the time of installation, it was by far the world’s longest extruded power cable 

HVDC cable system, including 2x400 km XLPE submarine HVDC cable, 2x40 km XLPE underground HVDC cable and 2x13 km XLPE underground HVDC cable

453 km

Turnkey ±300 kV DC cable system solution with a 700 MW power rating

2010 - 2015

Svenska kraftnät, Sweden and Litgrid AB, Lithuania

The Baltic Sea (Sweden-Lithuania)



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