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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TenneT congestion studies update

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TenneT expects the ongoing congestion management studies to be completed as of September. The various studies are in full swing and extensive market consultations are currently taking place. The current studies take into account the latest insights from the new Grid Code, which was published by the ACM last week.


Last year TenneT announced congestion studies for Brabant-Limburg, Friesland and Flevoland-Gelderland-Utrecht. The rapid growth of sustainable production in particular has created bottlenecks in various regions. The grid manager will then start a study into the possibilities of applying congestion management. With congestion management, in which flexibility plays an important role, the existing grid can be better utilized and space is created for new initiatives. The application of congestion management is a temporary measure on the way to structural grid reinforcements.

Studies in progress

The studies are in progress. They include an assessment of the suitability of the network for application of the system. An extensive market survey is also being carried out in the various areas, looking at parties who can offer flexible power. Part of the market exploration is the recently published consultations. The latest insights from the new Grid Code, which was published by the ACM last week, are also included in the current studies. This new code provides more room for the application of congestion management. Grid managers have six months to implement this.

TenneT expects these ongoing studies to be completed as of September. 

For more information visit tennet.eu/congestieonderzoeken

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