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 23,500 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 Congestie Market

Part of Frisian grid reaches limit for feed-in of electricity

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In the south and west of Friesland the limit for feeding electricity back to the national high-voltage grid has been reached. The high-voltage substations and connections in this area have reached the maximum limit of what can be transported. 

TenneT will invest a quarter of a billion euros in the coming years to increase the capacity of the grid. At the same time, the national grid manager will start an investigation into the possibilities of creating more connection space with other solutions. This emerges from a formal notification made today to the ACM, the regulator of the energy market.

The rapid growth of wind and solar parks in Friesland together provide a large amount of sustainable energy, which is by no means all consumed in the province. Throughout the province, 1800 megawatts of sustainable generation have now been developed or are in preparation. This leads to bottlenecks on the grid in the west and south of Friesland, where approximately 1500 megawatts of renewable generation are located. TenneT will structurally resolve these bottlenecks by means of reinforcements, including the installation of additional transformers and adjustments to the regional high-voltage grid. The expected expansion will take place in phases and is expected to last between three and seven years.

Understanding the plans as early as possible

Robert Kuik, TenneT Manager of Grid Planning: "In Friesland there are plenty of plans for sustainable energy production, which continue to develop at a rapid pace. All these developments require adjustments to the high-voltage grid. For TenneT it is crucial to know when and where the plans will come as specifically and as early as possible, because expansion of the high-voltage infrastructure takes a lot of time. At the same time we are also looking at other solutions to realise more connection space in the shorter term in order to facilitate the Frisian ambitions from the Climate Agreement in a timely manner."

TenneT invests 250 million euros in grid reinforcement in Friesland

TenneT will continue to invest in Friesland over the next few years. In addition to installing additional transformers at the connection stations with the national electricity highway, various grid upgrades will also be carried out. For example, TenneT intends to modify the existing connection between Oosterwolde and Oudehaske so that more electricity can be transported. Windpark Fryslan was already connected this spring, now with a direct cable connection to Oudehaske, and later via a new high-voltage substation to be built near Bolsward. TenneT is also working on initial expansions of the Louwsmeer high-voltage substation and installing additional capacity at the Oudehaske substation. Total investments amount to a quarter of a billion euros.

Research into congestion management

If structural bottlenecks occur in the electricity network, the grid manager will also start a formal investigation, based on laws and regulations, into the possibilities of applying congestion management. This is a method based on the electricity market to create more connection space and at the same time prevent overloading of the electricity network. The results of this study are expected in the second half of 2021.

View the congestion report 

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