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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We are TenneT

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VNB TenneT - VNB

Overview of market processes

Formation and transmission of grid time series

The “responsible DSO” is the DSO which accepts responsibility for reporting to the BIKO pursuant to MaBiS. Both DSOs agree in advance, before forming a grid time series, which DSO will take over the task of the responsible DSO in the overall process “Exchange processes for grid time series”.

There is always only one responsible DSO, the other DSO is then automatically the “neighbouring DSO”. Usually the previous DSO is the responsible DSO. The responsible DSO has to be agreed between two DSO in advance, if two neighboured grids are on the same level.

Activation of grid time series with the BIKO

The reporting of a grid time series (NZR) is done by the responsible DSO during master data exchange with the BIKO (according to the process “Master data exchange for balancing sums”). Activation must occur at the latest before the delivery month.

Coordinating grid time series
(DSO <=> DSO)

All DSOs determine their grid time series by no later than the 5th working day after the end of the supply month and coordinate them (by no later than the 8th working day) with the neighbouring DSOs connected through physical supply terminals. (The balancing areas are demarcated by the installed transfer measurements between the balancing group areas of the downstream/neighbouring DSO. Grid areas that cannot be demarcated by technical measuring means cannot be independent balancing areas.) The grid time series is the transfer sum between balancing areas, i.e. the difference between the sums of the grid corridor time series (NGZ) of two balancing areas.

The NGZ thus indicates the measurement/metering of a physical transfer point at a metering point and consists of two time series for both energy flow directions (NGE: grid corridor time series export, NGI: grid corridor time series import).

Sending of coordinated grid time series
(DSO <=> BIKO)

The coordinated grid time series for the balancing group areas of the DSOs are only transmitted by a responsible DSO to the BIKO.

Time series type used: NZR*

The sum of all grid corridor time series (NGI and NGE) between two balancing areas is summarized in an NZR (grid time series).

* In billing, the grid time series (NZR) consists of two directional time series (”export out of” and “import into” the balancing area of the transmitting DSO) which have the same metering point and whose direction is made recognizable in the OBIS identifier. The OBIS is therefore formed from the point of view of the responsible DSO. Both directions are transmitted in a report.

For further questions please do not hesitate to contact us under vnb-edm(at)tennet.eu


PKI certificate supplier (2 KB, cer, 08/07/2018)

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PKI certificate DSO (1 KB, cer, 08/07/2018)

PKI certificate DSO Download Download
Presentation (978 KB, pdf, 11/17/2016)

MaBiS Processes (german)

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