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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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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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. 



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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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TenneT and Vattenfall to study potential Dutch and UK offshore wind farm connections

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The benefits and feasibility of trading electricity between the UK and the Netherlands by connecting the offshore electrical infrastructure of a UK and Dutch offshore wind farm is to be assessed in a unique study by two of Europe’s major energy players, it was revealed today.

Vattenfall, the Swedish energy group, and TenneT, the Dutch-German transmission system operator, have joined forces to assess the technical feasibility, regulatory challenges and the benefits of running an interconnector between a substation in the designated offshore wind area IJmuiden Ver in Dutch waters, to one of Vattenfall’s substations in UK waters.

The concept of connecting offshore wind transmission infrastructure with an interconnector is known by the partners as WindConnector. By running a high voltage cable between two planned offshore substations, UK and Dutch electricity markets would be further interconnected, enabling more power to be traded between these two market through the efficient use of the wind transmission infrastructure. By making multiple use of transmission assets that are already planned, the additional investments are much less than what would be needed for a conventional interconnector between the two countries. 

Vattenfall’s Gunnar Groebler, Senior Vice-President Wind, said: “As an industry leader with a  growing wind business it was a natural and conscious choice taking a lead with TenneT on this study. The infrastructure needed to support offshore wind is a major capital investment. Anything we can do to optimise our assets with a smart project like WindConnector is good for a competitive, low cost, fossil-free offshore wind industry and great news for consumers. Partnering with TenneT means the expertise on both sides will deliver a thorough job in assessing the feasibility of WindConnector.”

Mel Kroon, CEO TenneT/Wilfried Breuer,  Director Offshore TenneT: "In order to meet the climate targets of Paris, we must, among other things, move towards a development of wind at sea on a large scale. Scale size and at the same time affordability for society requires efficient, smart solutions and close cooperation at international level. The fact that this study is done by a European market player and a European grid operator with both extensive offshore experience will prove to be of great value for the further development of offshore wind energy."

Vattenfall and TenneT both signed an MoU which sets out the basis of cooperation to complete the WindConnector study. Results are expected to be published later in 2018.

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Jeroen Brouwers

Media Relations

+31 (0)26 373 26 00

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