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 around 24,500 kilometres of high-voltage lines, we cross borders and connect countries.

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Offshore Outlook 2050

Already by 2030, the originally planned capacity of 15 gigawatts of offshore wind energy will increase to 20 GW.

To Offshore Outlook 2050
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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Our vision is to be one of the most transparent Transmission System Operators (TSO) in Europe and thereby creating value for society. In this Energy Insights section we present selected energy related topics and show data, information and valuable insights. 



Facts & figures related to TenneT facilitating the market can be found here.

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TenneT is a leading European electricity transmission system operator (TSO), with activities in the Netherlands and in Germany. We strive to ensure a reliable and uninterrupted supply of electricity in our high-voltage grid for some 42 million people.

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We are TenneT

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Grid connection with the world's most powerful offshore converter platform



  • 135 km long and 916 MW capacity
  • 90 km onshore cable
  • 45 km offshore cable

Grid connection point

  • converter station Dörpen/West

Status of project

  • in operation since spring 2016

About the project

Since 2016, three wind farms - Gode Wind 1, Gode Wind 2 and Nordsee One - have been connected to the transmission grid via the 135-kilometer DolWin2 direct current connection. In addition to 45 kilometres of submarine cable, TenneT also laid 90 kilometres of land cable, which run from the coast to the onshore converter station Dörpen West in Emsland. There, the direct current is converted back into three-phase current, fed into the transmission grid by the transformer station and redistributed to consumption-intensive regions. With a transmission capacity of 916 megawatts (MW), DolWin2 can supply more than one million households with clean wind energy per year.

DolWin beta, the heart of the DolWin2 grid connection, is currently the most powerful offshore converter platform in the world. For DolWin beta, TenneT opted for an innovative installation concept: the platform was anchored to the seabed by gravity alone. This design simplified the installation of the offshore converter platform, as it meant that no piles had to be driven into the seabed and no crane ship was required. To stabilize the platform, water was slowly pumped into the six steel legs during installation, causing it to sink to the seabed. Subsequently, the water in the steel legs was replaced by gravel and sand to fix the platform permanently. DolWin beta thus defies the harsh North Sea conditions and is always calm in the water even in strong waves.

Anjuli Walter

Pressereferentin - Projektkommunikation Offshore für DolWin5 und DolWin