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Leading service provider for Transmission System Operators (TSOs) in the European electricity market.

Through our single trading platform we auction cross-border transmission capacity rights. We also provide accounting (clearing and settlement), contracting, reporting, project support and IT services.

 

Auctions

On behalf of TSOs, we organize long and short-term auctions of transmission capacity rights.

We offer the following products: yearly, seasonal, quarterly, monthly, weekly, daily and intraday.

Auction results Auction calendar
OPS
  • 500+
    Registered market participants
  • 26k+
    Auctions held annually
  • 100%
    Auction tool availability
  • 80+
    Employees
  • 50
    TSOs serviced

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Amendment of the Viking Link Access Rules

by JAO

We are pleased to announce that, following approval by the relevant NRAs, the amended version of the Viking Link Access Rules has been published on our website and will come into effect on the 16th July 2026.

The relevant sections on our website have also been updated with the Access Rules’ subset parts accordingly:

We remain at your disposal in case of any question.

Capacity Curtailment on the HU-AT border for delivery period 19-06-2026

by JAO

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

HU-AT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / hour for each concerned period:

19-06-2026 08:00 - 09:00 295 MW

19-06-2026 09:00 - 10:00 295 MW

19-06-2026 10:00 - 11:00 295 MW

19-06-2026 11:00 - 12:00 295 MW

19-06-2026 12:00 - 13:00 295 MW

19-06-2026 13:00 - 14:00 295 MW

19-06-2026 14:00 - 15:00 295 MW

19-06-2026 15:00 - 16:00 295 MW

5. Amount of LTTR remaining after curtailment:

19-06-2026 08:00 - 09:00 35 MW

19-06-2026 09:00 - 10:00 35 MW

19-06-2026 10:00 - 11:00 35 MW

19-06-2026 11:00 - 12:00 35 MW

19-06-2026 12:00 - 13:00 35 MW

19-06-2026 13:00 - 14:00 35 MW

19-06-2026 14:00 - 15:00 35 MW

19-06-2026 15:00 - 16:00 35 MW

6. Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment*:

Expected violation of operational security limits of physical transmission assets.

7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s) *?

During the CC process, all the remedial actions provided by the TSOs are already considered by the CCC in the calculation.

Capacity Curtailment on the AT-CZ border for delivery period 19-06-2026

by JAO

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

AT-CZ

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / hour for each concerned period:

19-06-2026 08:00 - 09:00 350 MW

19-06-2026 09:00 - 10:00 350 MW

19-06-2026 10:00 - 11:00 350 MW

19-06-2026 11:00 - 12:00 350 MW

19-06-2026 12:00 - 13:00 350 MW

19-06-2026 13:00 - 14:00 350 MW

19-06-2026 14:00 - 15:00 350 MW

19-06-2026 15:00 - 16:00 350 MW

5. Amount of LTTR remaining after curtailment:

19-06-2026 08:00 - 09:00 38 MW

19-06-2026 09:00 - 10:00 38 MW

19-06-2026 10:00 - 11:00 38 MW

19-06-2026 11:00 - 12:00 38 MW

19-06-2026 12:00 - 13:00 38 MW

19-06-2026 13:00 - 14:00 38 MW

19-06-2026 14:00 - 15:00 38 MW

19-06-2026 15:00 - 16:00 38 MW


6. Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment*:

Expected violation of operational security limits of physical transmission assets.

7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s) *?

During the CC process, all the remedial actions provided by the TSOs are already considered by the CCC in the calculation.

Capacity Curtailment on the SI-AT border for delivery period 19-06-2026

by JAO

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

SI-AT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / hour for each concerned period:

19-06-2026 08:00 - 09:00 370 MW

19-06-2026 09:00 - 10:00 370 MW

19-06-2026 10:00 - 11:00 370 MW

19-06-2026 11:00 - 12:00 370 MW

19-06-2026 12:00 - 13:00 370 MW

19-06-2026 13:00 - 14:00 370 MW

19-06-2026 14:00 - 15:00 370 MW

19-06-2026 15:00 - 16:00 370 MW

5. Amount of LTTR remaining after curtailment:

19-06-2026 08:00 - 09:00 39 MW

19-06-2026 09:00 - 10:00 39 MW

19-06-2026 10:00 - 11:00 39 MW

19-06-2026 11:00 - 12:00 39 MW

19-06-2026 12:00 - 13:00 39 MW

19-06-2026 13:00 - 14:00 39 MW

19-06-2026 14:00 - 15:00 39 MW

19-06-2026 15:00 - 16:00 39 MW


6. Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment*:

Expected violation of operational security limits of physical transmission assets.

7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s) *?

During the CC process, all the remedial actions provided by the TSOs are already considered by the CCC in the calculation.

Capacity Curtailment on the AT-DE border for delivery period 19-06-2026

by JAO

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

AT-DE

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / hour for each concerned period:

19-06-2026 08:00 - 09:00 3620 MW

19-06-2026 09:00 - 10:00 3620 MW

19-06-2026 10:00 - 11:00 3620 MW

19-06-2026 11:00 - 12:00 3620 MW

19-06-2026 12:00 - 13:00 3620 MW

19-06-2026 13:00 - 14:00 3620 MW

19-06-2026 14:00 - 15:00 3620 MW

19-06-2026 15:00 - 16:00 3620 MW

5. Amount of LTTR remaining after curtailment:

19-06-2026 08:00 - 09:00 1546 MW

19-06-2026 09:00 - 10:00 1546 MW

19-06-2026 10:00 - 11:00 1546 MW

19-06-2026 11:00 - 12:00 1546 MW

19-06-2026 12:00 - 13:00 1546 MW

19-06-2026 13:00 - 14:00 1546 MW

19-06-2026 14:00 - 15:00 1546 MW

19-06-2026 15:00 - 16:00 1546 MW


6. Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment*:

Expected violation of operational security limits of physical transmission assets.

7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s) *?

During the CC process, all the remedial actions provided by the TSOs are already considered by the CCC in the calculation.

Capacity Curtailment on the ES-FR border for delivery period 19-06-2026

by JAO

1. TSO(s)*:

RTE-TSO

2. Identification of affected Long Term Transmission Rights:

ES-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / hour for each concerned period:

19-06-2026 13:00 - 14:00 1320 MW

19-06-2026 14:00 - 15:00 1320 MW

19-06-2026 15:00 - 16:00 1320 MW

19-06-2026 16:00 - 17:00 1320 MW

19-06-2026 17:00 - 18:00 1320 MW

19-06-2026 18:00 - 19:00 1320 MW

5. Amount of LTTR remaining after curtailment:

19-06-2026 13:00 - 14:00 1243 MW

19-06-2026 14:00 - 15:00 1243 MW

19-06-2026 15:00 - 16:00 1243 MW

19-06-2026 16:00 - 17:00 1243 MW

19-06-2026 17:00 - 18:00 1243 MW

19-06-2026 18:00 - 19:00 1243 MW

6. Information on exact operational limit(s) that are expected to be violated in the absence of curtailment :

19/06/2026

      13:00-14:00 MARMAGNE-TABARDERIE 2

      14:00-15:00 MARMAGNE-TABARDERIE 2

      15:00-16:00 MARMAGNE-TABARDERIE 2

      16:00-17:00 MARMAGNE-TABARDERIE 2

      17:00-18:00 MARMAGNE-TABARDERIE 2

      18:00-19:00 MARMAGNE-TABARDERIE 2

7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s) ? :

   The available remedial actions were assessed as insufficient or ineffective to avoid the violation of operational security limits

Capacity Curtailment on the SI-IT border for delivery period 18-06-2026

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

SI-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / hour for each concerned period:

18-06-2026 21:00 - 22:00 203 MW

18-06-2026 22:00 - 23:00 203 MW

18-06-2026 23:00 - 24:00 203 MW

5. Amount of LTTR remaining after curtailment:

18-06-2026 21:00 - 22:00 184 MW

18-06-2026 22:00 - 23:00 184 MW

18-06-2026 23:00 - 24:00 170 MW

6. Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment*:

Expected violation of operational security limits of physical transmission assets

7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s)*?

During the CC process, all the remedial actions provided by the TSOs are already considered by the CCC

Resource Center

This section contains key information for market participants such as user guides, forms, auction rules, nomination deadlines and other documents.

Go to resources

Our certifications

JAO has successfully implemented internationally recognized management systems and is now officially certified for ISO/IEC 27001:2022 – the global standard for Information Security Management Systems and for ISO 9001 – the international standard for Quality Management Systems. 

ISO
IT

About us

We started as a shared auction platform for transmission capacity across Central Western Europe in 2008. Over time, we became the operator of the Single Allocation Platform and therefore the leading trading platform for European Transmission System Operators.

Get to know us

Register your company

We created a user guide to support the onboarding of market participants. Learn more about the steps to register, the required documents and our service desk platform.

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Frequently asked questions

Check out the common questions and our answers on how to use the auction platform.

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Do you need support?

If you can't find an answer to your question, our team is here to help!

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