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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Maintaining balance

TenneT continuously monitors and maintains the balance between the electricity supply and demand on the Dutch and large parts of the German grid.

Supply and demand

TenneT continuously monitors and maintains the balance between the electricity supply and demand on the Dutch and a large part of the German grid. If this balance is disrupted it may result in a power outage or even a black-out, depending on the length and severity of the imbalance. 

Whether the balance can be achieved, maintained and restored depends on three factors:

  1. All connected parties take the required Balance Responsibility and specify how much they expect to feed into and take out of the grid each day;
  2. TenneT calculates and deploys the reserve and emergency power that connected parties supply;
  3. TenneT and the programme responsible parties offset imbalances according to the imbalance pricing system.    

When there are not enough resources available to restore the balance, we can take additional measures – we have a mandate to prevent or limit potential damage to the power supply.  


Balance responsibility

Connected parties are responsible for informing grid administrators of their planned electricity production, consumption and transport needs.

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Congestion manamement

Congestion management uses price mechanisms and market forces to manage electricity supply and demand. TenneT works with the regional grid operators to operate the system.

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System services

System services are the services TenneT provides to guarantee the flow of electricity in the Netherlands and a part in Germany, resolve large-scale disruptions and maintain the balance between electricity supply and demand.

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