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 22,000 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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MARI-Project: 19 European TSOs agree to further cooperation on mFRR-platform

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On April 5, 2017, nineteen European Transmission System Operators signed a Memorandum of Understanding for the design, implementation and operation of a new manual frequency restoration reserve platform.

A cooperation of nineteen Transmission System Operators (TSOs) from across Europe signed a Memorandum of Understanding (MoU) to consolidate a single, shared view on how to implement a European platform for the exchange of balancing energy from Frequency Restoration Reserves with manual activation (mFRR platform). The project is called MARI which stands for Manually Activated Reserves Initiative.

Signing TSOs

As the Commission regulation Guideline on Electricity Balancing (GL EB) approved on March 16, 2017, by the Electricity Cross Border Committee requires the introduction of platforms coordinating the exchange of balancing energy for all types of reserves, the participating TSOs started working on the principles of a common mFRR platform already in 2016. It is expected that a well-designed platform not only fulfills the GL EB requirements but also reinforces the security of supply and increases the efficiency and cooperation in balancing across Europe. Through this MoU, the participating TSOs have set out common guiding principles for a successful implementation.

Participating TSOs are now moving their focus to the development and implementation of a mFRR platform. During this process, the cooperation commits itself to communicating latest developments and asking input from all the stakeholders, including National Regulatory Authorities (NRAs). Thanks to the TSOs’ efforts ahead of the entry into force of GL EB, the project is currently optimistic to meet the timescales foreseen in the regulatory framework, that is to say 2022.

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Jeroen Brouwers

Media Relations

+31 (0)26 373 26 00

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