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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Innovation

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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Congestion management

The single European electricity market is constantly developing.

Electricity has been increasingly traded across national borders since the end of the nineties. The flows of electricity here primarily follow the different price levels in Europe. However, the transmission capacities at the interconnectors between the individual European neighbours are limited. The consequence is that today, the demand for transmission capacities for cross-border trading far exceeds the available capacity of the lines at many locations, resulting in cross-border congestions. If all requests were to be permitted, then overloads would inevitably be the consequence. The security of the grid could then no longer be guaranteed.

What we do to handle congestion in the grid

New power lines


TenneT invests in the construction of new power lines as well as in the further development of the existing allocation procedure in order to improve the situation in the long term and permanently. New lines, however, must pass through complex and time-consuming approval procedures. Therefore, it is necessary to allocate the scarce transmission capacities to the traders for reliable grid operation. Methods have been developed to cope with this task, which are grouped under the term Congestion Management.

Auctions


Today, available capacities are mostly allocated by means of auctions. Auctions are transparent, market-oriented and free of discrimination and hence meet all the requirements of the European regulation. The transmission system operators (TSO) have set up bilateral or multilateral auction offices to carry out joint and coordinated auctions. They take over the operating side of handling congestion management.

Market integration


TenneT belongs to four of the seven European regional markets (Northern Europe, Central Eastern Europe, Central Western Europe und Central South Europe) in which the harmonisation of a common single European electricity market is pursued for the time being. As the only German transmission system operator (TSO), TenneT is involved in four regional markets and hence has taken a central key role.

Allocation procedure

Presently, there are three export-import, long-term, cross-border congestions for TenneT TSO GmbH.

Czech Republic and Germany

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Denmark West and Germany

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The Netherlands and Germany

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Allocation procedure

The allocation procedure in principle provides three time frames for congestion management: explicit annual and monthly transmission rights, day-ahead allocation and intraday allocation. Allocations are in part carried out explicitly, in the form of transmission rights that entitle nominating cross-border schedules, but also implicit within the framework of the so-called Market Coupling.

Explicit auctions of transmission rights are always carried out by the Joint Allocation Office (JAO).

Information about ENTSO-E and the Network Codes

ENTSO-E transparency platform

Data on transmission capacity

Information about the CWE-CEE merger project

Description congestion management (395 KB, PDF, 05/16/2016)

German

Description congestion management Download Download
Description Congestion Management (393 KB, pdf, 05/16/2016)

English

Description Congestion Management Download Download