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TenneT together with other European Transmission System Operators (TSOs) of the Core Capacity Calculation Region (Core CCR) have taken another important step on the backbone of the European Energy Market of the future: The Improved Coordination Solution (ICS) of remedial actions.
TenneT is part of the biggest capacity calculation region, the so-called Core, existing of 16 TSOs of Austria, Belgium, Croatia, the Czech Republic, France, Germany, Hungary, Luxemburg, the Netherlands, Poland, Romania, Slovakia and Slovenia.
They are developing and implementing market integration solutions defined in European legislation. Further integration of the wholesale electricity markets is essential for the energy transition towards a carbon free energy system.
The current regulatory focus is thus on increasing cross-zonal capacities including increased cooperation and harmonisation between member states. Since it becomes increasingly challenging and expensive to maintain operational grid security, a common cross-border determination and coordination of remedial actions is needed. That is why the ROSC (Regional Operational Security Coordination) Methodology were developed and adopted for each European CCR. For each CCR, the methodology establishes common processes for Regional Security Analysis, Remedial Action Optimization, Coordination and Cost Sharing within the respective CCR. The processes cover the operational planning timeframe Day Ahead and Intraday and will complement and replace already existing national and international operational planning processes. The ROSC methodology will be stepwise implemented in the coming years and they bring an international obligation of TSOs to share and coordinate remedial actions for solving congestions in TSO´s grids. It should lead to a more efficient use of remedial actions and to enhancing the security of electricity supply.
First step of Regional Operation Security Coordination between 13 countries
As part of this process on 1 November, the ICS process was launched by CCR Core TSOs and Regional Security Coordinators (RSCs). RSCs are centres of cooperation of the involved TSOs and play an important operational role in all the coordinated processes in CCR Core. The ICS provides a daily exchange of Remedial Actions potential, such as Redispatch and Countertrade potential, topological measures, available Phase Shifter Tap ranges and also introduces a common Coordination process for the planning and activation of these Remedial Actions.
Target solution will be implemented as next step in 2024
The implementation of the ICS marks an important milestone, but only the first step in a sequence of implementations which TSOs will perform in order to fulfil the guidelines on electricity transmission system operation established by the EU Commission (SO GL). With this early implementation the existing operative planning processes are prepared for the target solution of the future, the Coordinated Security Analysis (CSA). For the target solution a common centralized platform will enable Core TSOs to optimize remedial actions, in order to relieve existing congestions in the grid and utilize the grid in the most efficient way.
The ramping restriction on NordLink has been 300MW/hour for the Day Ahead and Intraday market since the start of operation in December 2020. Statnett is still facing a situation where ramping from HVDC interconnectors connected to NO2 need to be restricted, but changes are now made to split the individual restrictions more evenly between the different Interconnectors.
Statnett and TenneT have agreed to increase the allowed hourly ramping for NordLink to 600MW/hour from November 10th 2021 and will in addition implement a combined ramping restriction for NorNed and NordLink of 900MW/hour. At the same time the restriction for the Skagerrak interconnector will be set to 450MW/hour.
On 7 April 2020, TenneT has published the Annual Market Update. We are pleased to bring this publication to the attention of our business relations.
About the Annual Market Update 2020
The TenneT Annual Market Update provides an overview of relevant developments in the Central West European electricity markets, with a special focus on the Netherlands and Germany, the countries in which TenneT operates. The Market Update 2020 highlights developments in the areas of: electricity prices; fuel prices (gas, coal, CO2 rights); consumption and various forms of electricity generation; subsidy schemes for sustainable electricity production; and interaction (e.g. imports and exports) between the Dutch system and those in neighbouring countries. Special attention is also paid to ensuring the stability and operation of the electricity system by showing the (price) developments for balancing (maintaining the balance between supply and demand) and redispatch (preventing congestion on the grid).
Electricity market prices: prices fall due to COVID-19 measures
Electricity market prices in the Central Western European (CWE) countries of the Netherlands, Belgium, Germany, France and Austria fell by 19 per cent in 2020. The price decreases are mainly due to lockdown measures taken by governments in the COVID-19 pandemic. Due to partial or total lockdown measures, industry in some countries reduced or even halted its production, causing a sharp fall in demand for electricity and gas. A decline was visible from February to May, from June onwards market prices recovered for the rest of the year to prices above the annual average of € 39 per MWh.
If you have any further questions, please feel free to contact the TenneT Customer Care Center by telephone on +31 88 936 1717, or send us an email at tennetccc(at)tennet.eu.
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
|10T-DE-DK-00001I||380-kV-Stromkreis Jardelund - Kassoe/ENDK 1|
|10T-DE-DK-00002G||380-kV-Stromkreis Jardelund - Kassoe/ENDK 2|
|11T0-0000-0926-V||380-kV-Stromkreis Handewitt - Jardelund blau|
|11T0-0000-0925-Y||380-kV-Stromkreis Handewitt - Jardelund grün|
|11T0-0000-0924-0||380-kV-Stromkreis Audorf Süd - Flensburg - Handewitt blau|
|11T0-0000-0923-3||380-kV-Stromkreis Audorf Süd - Flensburg - Handewitt grün|
|10T1001C--00063U||380-kV-Stromkreis Handewitt - Kassoe/ENDK 1|
|10T1001C--00064S||380-kV-Stromkreis Handewitt - Kassoe/ENDK 2|
|11T0-0000-1471-8||380-kV-Stromkreis Schuby West - Handewitt rot|
|11T0-0000-1472-5||380-kV-Stromkreis Schuby West - Handewitt gelb|
|11T0-0000-1473-2||380-kV-Stromkreis Audorf Süd - Schuby West weiss|
|11T0-0000-1475-X||380-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.
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.
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:
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.
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.
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|
|from 31.12.2025 onwards||70|
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.
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.
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.
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.
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.
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
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:
Capacity according to Joint Declaration
New minimum available hourly capacity according to Commitment
[1.300 – 2.625 MW]*
*Capacity depends on the commissioning of planned interconnectors East Coast Line and West Coast Line.
30/11/21 08:12:26 Market
02/09/21 07:30:00 Market