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 22,500 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. 


Energy transition

Wind turbines and solar panels are the physical signs of consumers’ growing desire for clean, renewable energy.

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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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We are TenneT

Meet us


Two converter stations with substation near Wykhoffweg.



  • 3 converters with substation
  • planned especially for BorWin3


  • nature conservancy highly respected in plans
  • compensation measures in cooperation with "Stiftung Ökowerk Emden"

Status of project

  • 11/2013 until 07/2015 construction measures
  • commissioning planned for 2019

About the project

TenneT has started with the construction of a new substation and three converter stations east of the town of Emden on a site between Fehntjer Tief and Wykhoffweg Ost . The preparatory measures for the construction site, which started in November 2013, have already been completed. Now the construction of the buildings and the installation of the electrical systems necessary for the BorWin3 offshore grid connection system have started.

Connection on land

Direct current is the most efficient option in the case of long distances and high transmission capacities, both of which apply to the grid connection BorWin3, which will be implemented using a 900 megawatt DC connection. The BorWin3 project was awarded in April 2014.

The area needed for the building works in Emden/Ost is about 160,000 square metres. The B210 main road crosses the north-west section of the construction site. It connects Emden to the A31 motorway to the north of the construction site, which is used as the main route for transporting all materials. In addition, in the northern section there is the Fehntjer Tief waterway which is used by pleasure craft. A temporary construction site bridge has been built at the north-west corner of the construction site. The construction road was completed in spring 2014. To the east of Emden the construction road has been provided with an access and exit slip road to and from the B210 in order to help reduce the impact of the construction site traffic on local residents, especially those living in Emden/Borssum. A tourist cycleway which skirts the north and east of the construction site was safeguarded and diverted.

Aerial photographs

Connection at sea

In order to transport the alternating current (AC) generated by the offshore wind farms to shore, TenneT installs an offshore converter platform which converts the AC power to direct current (DC). From the converter platform the power is transmitted via a HVDC (high voltage direct current) transmission through subsea and land cables to the corresponding converter station onshore. The converter station onshore re-converts the DC current into AC current which can then be fed into the high voltage transmission grid.


Cornelia Junge

Pressereferentin - Projektkommunikation Offshore

0049 (0)5132 89-2357


Emden/Ost project

map of the construction field

Preparation of building

compensation measures / outline converterstation onshore

Even while the construction work is under way compensatory nature conservation measures are carried out in collaboration with the Ökowerk Emden environmental foundation.

The project is scheduled to be commissioned in 2019.


At the right: an outline of an onshore converterstation

Project downloads

Factsheet Emden/Ost (german) (1 MB, pdf, 09/19/2014)

Neues Umspannwerk mit zwei Konverterstationen am Wykhoffweg

Category: Brochures
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Die Naturschutzprojekte von TenneT (german) (785 KB, pdf, 08/02/2016)

Aufwertung der Lebensräume von zahlreichen Pflanzen- und Tierarten

Category: Brochures
Die Naturschutzprojekte von TenneT (german) Download Download

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TenneT Offshore brochure

"Energie von See an Land" brochure about TenneT offshore projects and technology (german only)

Offshore projects in Germany

Our other german offshore projects.

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Media footage

Your way to our pressfootage.

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