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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We are TenneT

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Incident Reserves (mFRRda)

For maintaining the real-time power balance of the Netherlands, TenneT TSO BV (TenneT-NL) mainly uses Frequency Restoration Reserves (FRR) offered to TenneT-NL by market participants. In case of incidents and substantial long-lasting power deviations TenneT-NL manually activates Frequency Restoration Reserves (directly activated). This page shows the volumes of activated mFRRda.

Incident Reserves (mFRRda)


The table shows the activated incident reserve capacity. The full activation time is applicable from the moment incident resereve is deployed. At the end of the activation, the deactivation time starts but the publication will show 0. Both the activation and deactivation time are described in the product information.

When you open this website you will see the data for today. TenneT refreshes this information every minute. A line in the overview remains empty, with the exception of the line number, if no current information is available due to malfunctions. TenneT will fill in empty lines at a later date, when the information becomes available within the time window of the overview.


It is inevitable that the real-time information is presented with a delay of several minutes due to the required processing procedures. Data is available via the 'export data' function.

Data Fields explained
Column namePTUPeriodDown (MW)Up (MW)
DescriptionProgram Time Unit
CommentThe period for which the activation applies.The activated power in the downward direction.The activated power in upward direction.
Field name (download)PTUPeriodVOLUME_DOWNVOLUME_UP
Example1500:15 - 00:16
Validation rules>1 and <101


Dutch Ancillary Services

TenneT's main tasks are providing transport services, providing system services, providing a connection service and facilitating the energy market. To provide these system and transport services, TenneT uses ancillary services offered by the market.

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Services in Germany

TenneT is the driving force behind the Energiewende, the transition to a sustainable energy supply in Germany.

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Security of supply

A secure and continuous supply of electricity is the key objective of our operations.

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