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 23,000 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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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 41 million people.

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Master data exchange

Master data for balancing group totals and grid time series must be activated before the delivery month. The minimum deadline of 2 working days before sending transaction data should only be used in exceptional cases! We will monitor this dealine by a system and refuse the data exchange at exceeding from 2014.

On the creation of metering points:

Section 4.2.3. MaBiS: “… Metering point names must be created according to the BDEW document “MeteringCode 2006” (edition of May 2008); metering point names that are not yet MeteringCode compliant must be adjusted accordingly where necessary. …”

and section 1.3.2. MaBiS:”… when re-activated, the same metering point name shall be re-used.” This means that: 

  • Each metering point name and each metering point is unique.
  • The use of identical metering points for different time series types is not permitted (e.g. ZP for supplier totals, which may not be used for balancing group totals as well).
  • A metering point activated in a master data packet can usually no longer be changed in the future, even after deactivation.

Regarding the creation and transmission of grid time series:

The total of all grid corridor time series (transfer measurements) between two balancing areas is summarized in one grid time series (NZR).

  • In each case, the BIKO only receives the grid time series for the DSO balancing areas from a system operator, usually from the system operator just upstream.
  • For neighbouring grids on the same level, the transmitting system operator is decided between the two system operators and communicated to the BIKO.

Time series with two direction values (BAS, DZR, NZR, DBA) are to be handled as follows: 

  1. A metering point name with two OBIS identifiers is activated.
  2. If a metering point name is deactivated, then both OBIS identifiers are automatically deregistered.
  3. Only one time series type is activated for both directions. The direction value is determined by specifying the OBIS identifier. Additional details can be found in the EDI@Energy Code List.
  4. The version number, if applicable the test report, as well as the data status all relate to the metering point name.
  5. During transaction data exchange, both directions must always be transmitted, even if one of the directions contains only 0 values.
  6. The time series cannot contain any negative values.

In order to avoid errors here, the positive and negative directions of these time series types are each to be jointly transmitted in one report (applies for both master and transaction data, even in the case of “null time series” in one direction).

Activating delta time series (DZR) with the DSO:

The DSO must accept the master data activation of the BIKO for the time being in its system. The clearing process of a possibly incorrect assignment must be initiated bilaterally and immediately with the BIKO, which in turn launches a deactivation / activation process. 


Presentation (978 KB, pdf, 11/17/2016)

MaBiS Processes (german)

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