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 German Corporate

Germany and Austria: Congestion management successfully launched

Berlin, Bayreuth, Dortmund, Stuttgart, 1 October 2018. Today, congestion manage-ment for electricity trading at the German-Austrian border launched punctually and successfully. At the behest of the German regulatory authority the four German transmission system operators, namely 50Hertz, Amprion, TenneT and TransnetBW, have been working on this project in close cooperation with the market players and authorities in both countries as well as at the regional and European levels. 

Congestion management secures electricity trading at the German-Austrian border and at the same time ensures grid stability and thus security of supply in Germany and Austria: Previously, there was unrestricted electricity trading due to the common bidding zone. This led to bottlenecks in the heavily loaded power grid that could only be stabilized with extensive measures. The transmission system operators expect a significant improvement in the capacity constraint situation between Germany and Austria and, accordingly, a reduced need for grid stabilization measures, especially at this border, as well as a relief of neighboring transmission grids, especially in Po-land and the Czech Republic. In the long term, this could also have a positive effect on grid charges and thus the costs for electricity consumers. 

Congestion management is in line with the objectives of the European Network Codes. According to the requirements of the German regulatory authority, market participants receive long-term transmission capacities of at least 4.9 gigawatts. As agreed with the German and Austrian regulatory authorities, the Austrian transmis-sion system operator will be ensure this capacity through power station capacity for grid stabilization measures. In case it is temporarily not available, the available transmission capacity at the German-Austrian border will be reduced accordingly. Long-term transmission capacities for the launch of congestion management were already successfully auctioned in mid-September, and the allocation in the day-ahead and intraday time frame also happened without complications. The daily calcu-lation of capacities will be included in the regional Central West European capacity calculation. The electricity exchange takes place via the so-called flow-based market coupling. 


Germany and Austria have so far formed a common bidding zone in the European energy market. The trade volume between the two countries has been rising steadily in recent years. However, since the physical transport capacity of the transmission grid is limited, this resulted in power supply overload over many hours throughout the year. As a result, the secure operation of the transmission grid in Germany, Austria and other neighboring countries has become increasingly complex resulting in the need for grid stabilizing measures. At the end of 2016, the European Agency for the Cooperation of Energy Regulators (ACER) decided to divide the joint bidding zone between Germany and Austria. As a result, the German regulatory authority commissioned German transmission system operators to prepare congestion management systems at the German-Austrian border by 2018. In the spring of 2017, the German and Austrian regulatory authorities agreed to the required level of long-term transmission capacity and the guarantee of sufficiently secured power station capacity for grid stabilizing measures by the Austrian transmission system operator. 

Contact persons:50Hertz Transmission GmbH Volker Kamm, T +49 30 5150 3417, M +49 172 3232759, E volker.kamm(at)50hertz.com

Amprion GmbH Solveig Wright, T +49 231 5849 14482, M +49 152208204961, E solveig.wright(at)amprion.net

TransnetBW GmbH Regina König, T +49 711 21858-3155, M +49 173 6507067 E r.koenig(at)transnetbw.de

TenneT TSO GmbH Ulrike Hörchens, T +49 921 50740 4045, M +49 151 17131120, E ulrike.hoerchens(at)tennet.eu


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