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.

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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 42 million people.

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News Dutch Project

New cost-efficient power cable represents world first for TenneT

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  • New cable design to be immediately applied in Randstad 380 kV North Ring project
  • Cost reduction achieved by using aluminium core instead of traditional copper core
  • Cable's useful life and transmission capacity remain high
  • Cable easier to handle thanks to lower weight

"This new cable design with an aluminium core represents a wonderful innovation", said TenneT Chief Operating Officer Ben Voorhorst. "It is just as reliable as the copper core cables we have used so far, but results in a significant cost reduction of 20 to 30 percent. The cable is also lighter and therefore easier to handle and install. Close collaboration between the TenneT team and cable manufacturer Prysmian has resulted in an innovative solution that will immediately yield benefits for TenneT and society as a whole."

The newly developed 3500 mm2 400 kV AlMil cable was manufactured by the Delft office of Prysmian Group and successfully passed the type test last week. This means that the new cable type can now be applied in practice. The cable will be used immediately in a 9 km-long section of the new Randstad 380 kV North Ring between Vijfhuizen and Bleiswijk. This section still needs to be laid underground.

De nieuwe kabel met een kern van aluminium in plaats van koper is uitgebreid getest bij Prysmian in Milaan

Cost reduction and environmental benefits

The conductive core of the new cable is made of aluminium, which is much cheaper than copper. The aluminium core and the plastic layer are covered by a so-called 'earth sheath' consisting of an aluminium shell ring. The aluminium shell ring is less burdensome on the environment than the traditionally used lead sheath.

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Jeroen Brouwers

Media Relations

+31 (0)26 373 26 00


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