Our key tasks

We are primarily tasked with providing power transmission services, system services and facilitating the energy market. Our core tasks follow from our appointment as grid operator under the Dutch 'Elektriciteitswet' (E-wet) and the German 'Energiewirtschaftsgesetz' (EnWG).


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TenneT presents Hub and Spoke concept for large scale wind energy on the North Sea.

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Our grid

TenneT manages the high-voltage grid in the Netherlands and large parts of Germany. TenneT transmits electricity at 110,000 volts (110 kV) and higher. With over 22,000 kilometres of high-voltage lines, we cross borders and connect countries.

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Grid maps

Maps of our onshore and offshore high-voltage grid.

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Electricity market

The energy sector is developing rapidly. The process of European market integration began some years ago. Its purpose is to create a single European market that enables market parties to trade gas and electricity across national borders easily and efficiently.

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Transparency data

We provide transparency data on our operations on our Dutch and German transparency page and on ENTSO-E. 

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The first direct connection between power markets in Germany and Norway.



  • 623 km grid connection DC (HVDC)
  • Capacity: 1.400 MW at ± 525 kV DC
  • Onshore: 53 km overhead line (Vollesfjord to Tonstad/NO)
  • Offshore: 516 km subsea cable
  • Onshore: 54 km land cable (Büsum to Wilster/DE)

Grid connection points

  • Substation Wilster (DE)
  • Substation Tonstad (NO)

Project status

  • Commercial operations 2020

About NordLink

The exchange of power enabled by NordLink will increase security of supply for the German and Norwegian grid and will allow exchange of renewable energies, especially hydroelectric power and wind power, between both countries. In addition it will give more stable electricity prices on both sides and, further on, also will facilitate European market integration.

NordLink - the “green cable”

NordLink will be a bi-pole, high voltage, direct current (HVDC) interconnector comprising a pair of high voltage electricity cables. Due to the distance involved (623 km), direct current (DC) electricity is used to transmit power through the cables which connect the converter stations at each end. Direct current (DC) is particularly favourable when transferring high energy via Long distances to minimise transmission loss. At the converter stations, which are to be built at Wilster in the German state of Schleswig-Holstein and at Tonstad in Norway, the electricity will be converted back into alternating current (AC) and connected to the respective German or Norwegian transmission grids in order to supply electricity to homes and businesses.

Driver of the energy transition / Integration of renewables

NordLink is a cornerstone in the accomplishment of the energy transition. Since incorporation of the project in the federal national plan law (Bundesbedarfsplangesetz), the energy market necessity and urgent requirement for implementation of the project has been made statutory.

The status “Project of Common Interest (PCI)” awarded by the European Union in accordance with the new guidelines for trans-European energy infrastructure underlines the high importance regarding socio-economic and energy market aspects of the Project at a European level.

NordLink – the “green cable” – will help to facilitate the integration of more renewable energy in Norway and in Germany. It will thus help to reduce CO2 emissions and reach climate goals.

With its capacity of 1.400 megawatts, the interconnector can provide renewable energy for more than 3.6 million German households and will be able to export for example wind generated by approximately 466 wind turbines of 3 megawatts. This is comparable to the capacity of a large conventional power plant.


Technical concept

German-Norwegian co-operation

The NordLink project will be realised by the Norwegian TSO Statnett and DC Nordseekabel GmbH & Co. KG, each with 50% ownership. TenneT TSO, and German promotional bank KfW both have shares of 50% in DC Nordseekabel. DC Nordseekabel is responsible for the construction of the German part of the project, including permits.

European market integration

NordLink is the first interconnector that directly connects Norwegian and German energy markets. This supports the integration of the Northwest European energy market, improves market efficiency and stabilises power prices.


Nordlink generates socio-economic benefits across borders.

The socio economic benefi t is the sum of change in congestion rent, producer and consumer surplus and depends on several factors such as the development of electricity prices, the future energy mix and market developments. An important part of the benefit is achieved by income from trade of capacity over the interconnector. The congestion revenue will be used for investing in grid projects or to lower grid fees. At times with high electricity prices in Germany (low photovoltaics and low wind in-feed), consumers will profit from the positive effect on the power prices due to the import of reasonable hydroelectric power from Norway.

In Norway, the interconnector will increase value creation for producers when there is a surplus of power, and benefit consumers when there is a shortage of power.
German-Norwegian co-operation

NordLink "the green link" - animation

NordLink – „the green power cable“ is the first direct connection between power markets in Germany and Norway. This high-voltage direct current (HVDC) interconnector of 623 kilometres length will allow the exchange of renewable energies between two complementary systems – hydropower from Norway and wind energy from Germany. This way NordLink will contribute to grid stability and security of supply in both countries and connect their power markets. NordLink has a capacity of 1,400 megawatts and is capable of providing electricity from renewable energies to approximately 3.6 million households in Germany. An important building block in the energy transition.

Dr. Robert Habeck (Minister for Energy Transition in Schleswig-Holstein) about the importance of NordLink

Dr. Robert Habeck (Green party), Minister for Energy Transition in Schleswig-Holstein, about the importance of NordLink as a key future building block in the European energy transition.

Security of supply

Interconnectors improve security of supply under the changing dynamics of energy markets in Europe. To connect hydro power to wind generation will enable TenneT and Statnett to better match demand for and supply of electricity. When there is a surplus of electricity from renewable energy sources in Germany, this can be exported to Norway via NordLink.

In those times the water reservoirs in Norway can work as a natural storage for energy by keeping the water in the reservoir.

Vice versa Germany can import Norwegian renewable energy in times of high demand. During dry and cold seasons in Norway the connection to Germany via NordLink will increase security of supply. This possibility requires also national grid expansion both, in Germany and Norway. In Germany, NordLink is a vital project in order to ensure future base load capability of the German renewable electricity system.

Downloads: Roofing ceremony 06.10.2017

NordLink: sections (1 MB, jpg, 10/05/2017)

NordLink: sections

NordLink: sections Download Download
NordLink: total (738 KB, jpg, 10/05/2017)

NordLink: total

NordLink: total Download Download
NordLink: Technical design (511 KB, jpg, 10/05/2017)

NordLink: Technical design

NordLink: Technical design Download Download
NordLink: building site (09/16) (2 MB, jpg, 10/05/2017)

NordLink: building site (09/16)

NordLink: building site (09/16) Download Download
NordLink: building site (09/17) (3 MB, jpg, 10/05/2017)

NordLink: building site (09/17)

NordLink: building site (09/17) Download Download
NordLink: Roofing ceremony (3 MB, jpg, 10/06/2017)

NordLink: Roofing ceremony Download Download
NordLink: Roofing ceremony_1 (3 MB, jpg, 10/06/2017)

NordLink: Roofing ceremony_1 Download Download
NordLink: Roofing ceremony_2 (4 MB, jpg, 10/06/2017)

NordLink: Roofing ceremony_2 Download Download
NordLink: Roofing ceremony_3 (2 MB, jpg, 10/06/2017)

NordLink: Roofing ceremony_3 Download Download


Factsheet: Benefits (299 KB, pdf, 10/05/2017)

Benefits of the NordLink interconnector

Factsheet: Benefits Download Download
Factsheet: Technical Design (130 KB, pdf, 10/05/2017)

Technical design of the first HVDC link between Germany and Norway

Factsheet: Technical Design Download Download


Mathias Fischer

Pressesprecher - Region Nord, Netzausbau offshore sowie onshore Nord, NordLink, Unternehmen

0049 (0)921 50740-4044

Also interesting


The Dutch and Norwegian electricity grids have been interconnected by the NorNed cable since 2008. The NorNed cable is 580 km long and has a capacity of 700 MW, making TenneT and our Norwegian counterpart Statnett the joint owners of the world’s longest subsea high-voltage direct current cable link.

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The COBRAcable will have a capacity of approx. 700 MW, will be around 325 kilometres long, and will run from Eemshaven (the Netherlands) to Endrup (Denmark) via the German sector of the North Sea. Two onshore converter stations – one in the Netherlands and one in Denmark – are needed to connect the cable to the existing grids.

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Media footage

Your way to our pressfootage. Topics: Contract signed for subsea cable & Signing and final investment decision for NordLink

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