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 23,000 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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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 41 million people.

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160-kilometer DC connection for offshore wind power



  • 160 km long nd 900 MW capacity
  • 80 km onshore cable
  • 80 km offshore cable

Grid Connection Point

  • converter station Dörpen/West

Status of project

  • initial operation planned for 2018

About the project

The DolWin3 project is the third offshore grid connection in the DolWin cluster and is intended to connect wind farms in the southwestern part of the German North Sea to the transmission grid. For this purpose, around 160 kilometres of cable must be laid: 80 kilometres each at sea and on land.

An important project milestone has already been reached: In July 2017, the heart of the Dolwin3 grid connection, the DolWin gamma converter platform, was erected at sea. The platform, which was built in Warnemünde in Mecklenburg-Western Pomerania, started its journey along the German and Danish coasts in mid-June and reached its final location in the North Sea after six days. There it was installed over several days on the substructure - the so-called jacket - which was already installed in 2016. Following the successful installation of DolWin gamma, work for the completion of the 900 megawatt (MW) grid connection is currently in full swing so that the connection can be commissioned in 2018. After commissioning, DolWin3 will be able to supply more than one million households with clean wind energy from the North Sea.

Cornelia Junge

Press Referent - Project Communication Offshore

0049 (0)5132 89-2357