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 around 23,500 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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E-Insights

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. 

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E-Insights

Facts & figures related to TenneT facilitating the market can be found here.

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Company

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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Market news

All market and customer related news.

Latest market news

Adaptation of annex 2 of TenneT’s Commitment to account for the commissioning of the East Coast Line

In compliance with TenneT’s Commitment to the European Commission (“Commitment”) (Commission Decision of 7.12.2018 […] Case AT.40461 – DE/DK Interconnector), TenneT guarantees a certain minimum transmission capacity at the bidding zone border of Germany/Luxembourg (“DE”) and Denmark West (“DK1”), referred to as Guaranteed Hourly NTC. According to recital 46 (i) of the Commitment, TenneT may reduce the Guaranteed Hourly NTC to what is necessary and proportional to comply with safety standards of secure network operation if critical transmission lines (listed in Annex 2 of the Commitment) are not available due to unplanned outages, construction or maintenance work; but not below a threshold of 500 MW (hereafter referred to as Minimum Threshold).

Following the commissioning of the East Coast Line the list of critical transmission lines of annex 2 of the Commitment and the Minimum Threshold have to be adapted and aligned with the Monitoring Trustee. Subsequently, the adaptation has to be published on the website of TenneT no later than 1 January following the commissioning of the East Coast Line. The Monitoring Trustee shall in this respect provide a report to the European Commission with his opinion on the appropriateness of the amendments.

Although TenneT has no process planned or implemented to apply reductions of the Guaranteed Hourly NTC in case of unplanned outages, construction or maintenance work in accordance with Annex 2 of the Commitment, the determination of the Minimum Threshold and the list of critical transmission lines shall be adapted as required by the Commitment.

Therefore, the Minimum Threshold and the list of critical transmission lines have been adapted to account for the commissioning of the East Coast Line. As of 1 January 2021 the Minimum Threshold will be increased to 1300 MW and the list of critical transmission lines defined in Annex 2 of the Commitment will be changed as .follows. The updated list is shown in Table 1.

  • Both 380 kV lines Audorf – Jardelund are rerouted via Handewitt to Audorf Süd 
  • Both 220 kV lines, Flensburg – Kassoe and Flensburg – Ensted have been decommissioned 
  • Two 380 kV lines originating from Audorf Süd to Kassoe via Handewitt and Schuby West have been commissioned. 

Table 1: Updated list of relevant critical transmission lines of annex 2 of the Commitment

 

EIC

Name

10T-DE-DK-00001I380-kV-Stromkreis Jardelund - Kassoe/ENDK 1
10T-DE-DK-00002G380-kV-Stromkreis Jardelund - Kassoe/ENDK 2
11T0-0000-0926-V380-kV-Stromkreis Handewitt - Jardelund blau
11T0-0000-0925-Y380-kV-Stromkreis Handewitt - Jardelund grün
11T0-0000-0924-0380-kV-Stromkreis Audorf Süd - Flensburg - Handewitt blau
11T0-0000-0923-3380-kV-Stromkreis Audorf Süd - Flensburg - Handewitt grün
10T1001C--00063U380-kV-Stromkreis Handewitt - Kassoe/ENDK 1
10T1001C--00064S380-kV-Stromkreis Handewitt - Kassoe/ENDK 2
11T0-0000-1471-8380-kV-Stromkreis Schuby West - Handewitt rot
11T0-0000-1472-5380-kV-Stromkreis Schuby West - Handewitt gelb
11T0-0000-1473-2380-kV-Stromkreis Audorf Süd - Schuby West weiss
11T0-0000-1475-X380-kV-Stromkreis Audorf Süd - Schuby West schwarz

Figure 1 shows the changes by comparison of the grid topology at the border DE-DK1 valid until 8 June 2020 before (left), and after the commissioning of the East Coast Line valid from 14 July 2020 (right). Each change is marked by a designated number, indicating whether a segment has been commissioned (green) or decommissioned (red).

Figure 1: Comparison between the grid topology before (left side) and after (right side) the commissioning of the East Coast Line

Starting on 8 June 2020 the 220 kV interconnector line leading from Flensburg to Kassoe was decommissioned (1). On 22 June 2020 the first out of two lines connecting Handewitt and Schuby West was commissioned, followed by the second line on 23 June 2020 (2). On 1 and 2 July 2020 respectively two interconnector lines connecting the substations Handewitt and Kassoe have been commissioned (3). By 14 July 2020 two lines between Audorf Süd and Schuby West (4) were commissioned, representing the completion of the East Coast Line. Finally the remaining 220 kV interconnector line between the substations Flensburg and Ensted was decommissioned on 3 August 2020.

Publication as pdf

NordLink – start of commercial operation

The TSOs Statnett and TenneT herewith confirm the golive-date for the operational phase of NordLink. Market operation will start 8th December with delivery as of 9th December 9:00. Capacities for the first delivery day will be set to 0 from hour 1 (00:00-01:00) to hour 9 (08:00-09:00). Hour 10 (09:00-10:00) is the first hour where capacities will be released. In addition, for system security reasons a maximum transmission capacity of NordLink of only 700 MW receiving end can be offered to the markets initially for a maximum duration of up to four weeks.

NordLink webinar 19th of November 2020

On 19th November TenneT and Statnett together with BDEW organized a NordLink webinar in order to provide latest information to interested market participants. The TSOs informed about the project and especially about market related topics such as capacity calculation and utilization. In order to make the presentation available also to those who could not participate, you may find a download link here. 

Please be aware that the date for go-live as mentioned in the slides has been updated by the TSOs some days after the meeting. TenneT and Statnett need one more week for testing than originally planned. This means, that market operation will start 8th December with delivery as of 9th December. Updated market messages will follow when further information becomes available.

The TSOs also received some additional questions after the webinar. In terms of transparency you may find the questions and answers below.

Article 3 of the Hansa capacity calculation methodology (CCM) foresees a coordinated net transmission capacity approach (cNTC). However, in accordance with the implementation plan of article 19 of the Hansa CCM a condition to apply the Hansa CCM is the successful implementation of the flow-based CCMs of capacity calculation regions (CCRs) Core and Nordic including Advanced Hybrid Coupling (AHC) for the CCR Hansa interconnectors. After that the Hansa day-ahead CCM is implemented. The Hansa cNTC approach will not foresee internal critical network elements with contingencies (CNECs) as these will be reflected in the AHC.
Article 19 (1) of the Hansa CCM foresees the following:

1. Implementation of this CCM will be a stepwise process with the following milestones:

a. The CCR Hansa CCC is appointed and in operation pursuant to Article 27(2) of CACM Regulation.

b. Implementation of the methodology for the CGM.

c. The flow-based CCMs of CCR Core and of CCR Nordic have been implemented including AHC for the CCR Hansa interconnectors.

d. The day-ahead CCM is implemented. Pursuant to Article 20(8) a 6-month testing of the methodology shall be coordinated with CCR Nordic and CCR Core.

e. The Single Intraday Coupling (SIDC) solution can apply flow-based parameters and relevant TSOs and the Nominate Electricity Market Operators (NEMOs) processes have been adapted accordingly.

f. The CCM for the intraday time frame is implemented.

Until the Hansa CCM is implemented, the Hansa TSOs calculate the capacities per border following the existing capacity calculation procedures.

For the new NordLink interconnector such a procedure does not exist. Therefore, TenneT introduces an interim cNTC approach for NordLink and the border Germany-Denmark1 (DE-DK1) until the implementation of the Hansa CCM.

The respective margins to be applied in any CNECs-based capacity calculation approach are published on the following website:

 

For the Baltic Cable (DE-SE4) so far only minimum NTCs are published as foreseen by the German action plan.

The minimum capacity is not necessarily equal to 1400 MW x 11.7 % for 2021. The minimum capacities apply to the CNECs. For NordLink and DE-DK1 the same CNECs will be applied. The current critical network elements (CNEs) for our borders are published on the following website:

New date for start of NordLink commercial operation

The date for when the NordLink interconnector starts commercial operation needs to be updated by TenneT and Statnett. Originally it was planned to start market operation on 1st December 2020 with delivery as of 2nd December. Due to technical challenges encountered during the last transmission tests TenneT and Statnett need one more week for testing. This means, that market operation will start 8th December with delivery as of 9th December. Updated market messages will follow when further information becomes available.

Commercial operation of NordLink – start-up phase

In December 2020, the TSOs Statnett and TenneT will start the commercial operation of NordLink, the new interconnector between Norway and Germany. According to plan, market operation will start 1st December with delivery as of 2nd of December. This depends on the successful completion of the transmission test phase, and the exact date will be confirmed in a later message. For system security reasons a maximum transmission capacity of NordLink of only 700 MW can be offered to the markets initially for a maximum duration of up to four weeks. As soon as the maximum transmission capacity of NordLink can be increased to 1.400 MW, we will inform the market participants. The requirements of the German action plan will still be respected.

Commercial operation of NordLink - capacity calculation

In December 2020, the TSOs Statnett and TenneT will start the commercial operation of NordLink, the new interconnector between Norway and Germany. The exact date will be published in a later message as this depends on the successful completion of the transmission test phase. According to current plan, market operation will start 1st December.

The NordLink capacity, that will be given to the day ahead and intraday market coupling, is the outcome of TenneT´s and Statnett´s capacity calculation process. On the German side, this includes the obligation of the German Action Plan to offer a minimum percentage of capacity per critical network element for cross-border trades.
The table below shows the linear trajectory of these minimum percentages to be applied  on the critical network elements for NordLink from start of commercial operation in 2020 until 70% are reached by 31.12.2025: 

year% of capacity per critical network element
20200
202111,7
202223,3
202335
202446,7
202558,3
from 31.12.2025 onwards70
Applies from delivery day 28.08.2020: Market info on Baltic Cable

Under coordination of Bundesnetzagentur the system operators Baltic Cable AB, Schleswig-Holstein Netz AG and TenneT TSO GmbH jointly developed an interim solution for the Baltic Cable (constituting the bidding zone border DE/LU – SE4) to meet the minimum transmission capacity according to the German Action Plan in line with article 15 of EU regulation 943/2019 (of 248 MW during the year 2020). The interim solution provides the possibility to apply costly remedial actions in order to avoid the day-ahead transmission capacity of BC to fall below the required minimum capacity. 

Info East-Coast Project ("Mittelachse")

Once TenneT and Energinet have successfully commissioned the new common 400kV-connection as replacement of the existing common 220kV-connection between substation Kassö (DK1) and substation Handewitt – replacement of substation Flensburg – (DE/LU) within the frame of the so called East Coast Project (“Mittelachse”), TenneT’s Guaranteed Hourly NTC will change according to TenneT’s Commitment towards DG Competition as follows.

Under the principle of a linear trajectory, the TenneT Guaranteed Hourly NTC shall be increased by equal yearly steps corresponding to the overall increase of the East Coast Line (575 MW) (“Mittelachse”) divided by the number of calendar years between (i) 1 January following the commissioning of the East Coast Line (“Mittelachse”) and (ii) 1 January 2026 resulting in annual increases of 96 MW. Thus, TenneT’s Guaranteed Hourly NTC increases from currently 1,300 MW to 1,396 MW by 1 January 2021.

Note that the maximum NTC was changed from 1,500 MW in southbound direction and 1,780 MW in northbound direction to 2,500 MW of either direction with the date of commissioning the new common 400kV-connection. 

Further note that the applicable NTC to determine the offered capacity is the hourly minimum of TenneT’s and Energinet’s individual hourly NTCs. TenneT’s hourly NTC is still subject to daily capacity calculation that could result in any value between TenneT’s Guaranteed Hourly NTC and the maximum NTC being in accordance with the requirements from the German Action Plan according to article 15 of regulation (EU) 943/2019. Energinet’s NTC is in the sole responsibility of Energinet and not affected by TenneT’s Guaranteed Hourly NTC or the German Action Plan.

TenneT’s Guaranteed Hourly NTC will further increase with the future commissioning of the West Coast Line by means of a linear trajectory of additional 750 MW.

FCR cooperation reaches first milestone in the development of Europe's largest FCR market

Announcement: Successful go-live of daily D-2 auctions for FCR

On June 27, the FCR cooperation, which consists of 50Hertz, Amprion, APG, Elia, Energinet (non-active member), RTE, Swissgrid, TransnetBW, TenneT Germany and TenneT Netherlands, took a first step towards the implementation of a new FCR market design to procure nearly half of the FCR capacity in the synchronous area. In addition to shortening the product length from one week to one day, the cooperation introduces a marginal pricing system. Within this framework, a complex allocation algorithm was developed on the basis of an optimization based on constraints, which takes different price zones into account.

The goal of the further development is a reduction of procurement costs as well as the creation of entry incentives for new standard service providers and technologies.

The FCR cooperation is the first regional cooperation to implement market harmonization using the method prescribed by the Guideline on Electricity Balancing (EBGL). The development path was developed with the involvement of stakeholders and regional cooperation regulators.

During the last two years, two consultation rounds have been carried out, during which detailed proposals have been developed and reports evaluated. The development resulted in a final proposal according to Art. 33 of the EBGL, which was approved by all participating national regulators.

In the course of the further procedure, product time slices of four hours are expected to be introduced in July 2020. In addition, the time of the market close is to be brought closer to the delivery period.

Harmonised Allocation Rules review of main body and regional annexes

This consultation is based on Article 6 of Commission Regulation (EU) 2016/1719 (FCA Regulation) and concerns the review of Harmonised Allocation Rules in accordance with Article 68(5) of these rules. Together with the Harmonised Allocation Rules main body all annexes which propose amendments will be consulted.

More information

Core FB MC Market Design is finalised for implementation - Flow-Based Market Coupling to be implemented in the Core Capacity Calculation Region

Vienna, Brussel, Zagreb, Prague, Paris, Berlin, Budapest, Luxemburg, Amsterdam, Warsaw, Bucharest, Bratislava, Ljubljana, 17 April 2019

According to article 20 of the Commission Regulation (EU) 2015/1222 establishing a guideline on capacity allocation and congestion management (CACM Regulation), a Flow-Based market coupling for the day-ahead timeframe has to be implemented in the Core capacity calculation region (Core CCR). The project parties involved in the Core Flow-Based Market Coupling project have finalised the Market Design for Implementation. The current planning foresees the go-live of Flow-Based Market Coupling in the Core CCR in Q4 2020.

Flow-Based Market Coupling is currently deployed within the Single Day-Ahead Coupling across Central Western Europe (CWE) covering Austria, Belgium, France, Germany, Luxemburg and the Netherlands.

With the Core Flow-Based Market Coupling project, all borders of the Core CCR will be coupled based on a Flow-Based capacity calculation methodology developed in the framework of the CACM Regulation.

About the Flow-Based Market Coupling project in Core

The Core Flow-Based Market Coupling project promotes the development and implementation of a Flow-Based day-ahead market coupling across the whole Core capacity calculation region (Core CCR) in the framework of the Single Day-Ahead Coupling (SDAC). The Core CCR consists of the bidding zone borders between the following EU Member States’ bidding zones: Austria, Belgium, Croatia, the Czech Republic, France, Germany, Hungary, Luxemburg, the Netherlands, Poland, Romania, Slovakia and Slovenia.

CCR Hansa TSOs’ announcement on the release of ID capacities

The CCR Hansa TSOs decided to offer left over capacities to the extent possible at 18:00 (with no guarantee that full leftover DA capacities will be provided to the ID market). In the following paper, the CCR Hansa TSOs outline the reasoning for the release of intraday capacities at 18:00.

More information in the press release

Minimum available hourly capacities for DE-DK West according to Joint Declaration and TenneT’s Commitment

According  to the Joint Declaration from the Danish Ministry of Energy, Utility and Climate and the German Economic Ministry in June 2017 on increasing the electricity trade between the two countries (see press release http://www.bmwi.de/Redaktion/DE/Pressemitteilungen/2017/20170614-deutschland-und-daenemark-einigung-auf-stromhandel.html and https://en.efkm.dk/news/news-archive/2017/jun/denmark-and-germany-agree-on-increasing-electricity-trade-between-their-countries/) and TenneT’s commitment towards the European Commission (see press release: https://www.tennet.eu/de/news/news/tennet-begruesst-entscheidung-der-eu-kommission-fuer-stromhandel-an-deutsch-daenischer-grenze/), the relevant Transmission System Operators of both countries, TenneT and Energinet, have agreed on the implementation of a joint countertrading program.

While Energinet and TenneT already met the requirements from the Joint Declaration since July 2017 for guaranteeing minimum available hourly capacities for both directions of the border DE/DK-West, TenneT needs to implement the additional demands from the commitment. Therefore, both Transmission System Operators have signed an extended agreement to support TenneT in meeting its commitments.

The minimum available hourly capacities are derived from both obligations. With respect to safeguarding system stability exceptions have been defined for reducing capacity guarantees. The minimum capacity applies for both trading directions in the day-ahead allocation. The table below shows the minimum available hourly capacities for the next periods:

 

Starting Date

Capacity according to Joint Declaration

New minimum available hourly capacity according to Commitment

01/2019

900 MW

900 MW

02/2019

900 MW

980 MW

03/2019

900 MW

1.060 MW

04/2019

1.000 MW

1.140 MW

05/2019

1.000 MW

1.220 MW

06/2019

1.000 MW

1.300 MW

01/2020

1.100 MW

[1.300 – 2.625 MW]*

01/2021

NA

*Capacity depends on the commissioning of planned interconnectors East Coast Line and West Coast Line.