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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.

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

Latest market messages

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Capacity Curtailment on the DE-AT border for delivery period 30-10-2025

by JAO

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

DE-AT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

30-10-2025 00:00 - 01:00 4819 MW

30-10-2025 01:00 - 02:00 4819 MW

30-10-2025 02:00 - 03:00 4819 MW

30-10-2025 03:00 - 04:00 4819 MW

30-10-2025 04:00 - 05:00 4819 MW

30-10-2025 05:00 - 06:00 4819 MW

30-10-2025 06:00 - 07:00 4819 MW

30-10-2025 07:00 - 08:00 4819 MW

30-10-2025 08:00 - 09:00 4819 MW

30-10-2025 09:00 - 10:00 4819 MW

30-10-2025 10:00 - 11:00 4819 MW

30-10-2025 11:00 - 12:00 4819 MW

30-10-2025 12:00 - 13:00 4819 MW

30-10-2025 13:00 - 14:00 4819 MW

30-10-2025 14:00 - 15:00 4819 MW

30-10-2025 15:00 - 16:00 4819 MW

30-10-2025 16:00 - 17:00 4819 MW

30-10-2025 17:00 - 18:00 4819 MW

30-10-2025 18:00 - 19:00 4819 MW

30-10-2025 19:00 - 20:00 4819 MW

30-10-2025 20:00 - 21:00 4819 MW

30-10-2025 21:00 - 22:00 4819 MW

30-10-2025 22:00 - 23:00 4819 MW

30-10-2025 23:00 - 24:00 4819 MW

5. Amount of LTTR remaining after curtailment:

30-10-2025 00:00 - 01:00 4593 MW

30-10-2025 01:00 - 02:00 4593 MW

30-10-2025 02:00 - 03:00 4593 MW

30-10-2025 03:00 - 04:00 4593 MW

30-10-2025 04:00 - 05:00 4593 MW

30-10-2025 05:00 - 06:00 4593 MW

30-10-2025 06:00 - 07:00 4593 MW

30-10-2025 07:00 - 08:00 4593 MW

30-10-2025 08:00 - 09:00 4593 MW

30-10-2025 09:00 - 10:00 4593 MW

30-10-2025 10:00 - 11:00 4593 MW

30-10-2025 11:00 - 12:00 4593 MW

30-10-2025 12:00 - 13:00 4593 MW

30-10-2025 13:00 - 14:00 4593 MW

30-10-2025 14:00 - 15:00 4593 MW

30-10-2025 15:00 - 16:00 4593 MW

30-10-2025 16:00 - 17:00 4593 MW

30-10-2025 17:00 - 18:00 4593 MW

30-10-2025 18:00 - 19:00 4593 MW

30-10-2025 19:00 - 20:00 4593 MW

30-10-2025 20:00 - 21:00 4593 MW

30-10-2025 21:00 - 22:00 4593 MW

30-10-2025 22:00 - 23:00 4593 MW

30-10-2025 23:00 - 24:00 4593 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.

*According to section 57.3 of the EU HAR, this field can be filled in within 24 hours after the initial publication

Capacity Curtailment on the NL-DK border for delivery period 30-10-2025

by JAO

1. TSO(s)*:

TenneT_NL

2. Identification of affected Long Term Transmission Rights:

NL-DK

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

30-10-2025 19:00 - 20:00 180 MW

30-10-2025 20:00 - 21:00 180 MW

30-10-2025 21:00 - 22:00 180 MW

30-10-2025 22:00 - 23:00 180 MW

30-10-2025 23:00 - 24:00 180 MW

5. Amount of LTTR remaining after curtailment:

30-10-2025 19:00 - 20:00 0 MW

30-10-2025 20:00 - 21:00 0 MW

30-10-2025 21:00 - 22:00 0 MW

30-10-2025 22:00 - 23:00 0 MW

30-10-2025 23:00 - 24:00 0 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)*?

The remedial actions considered were assessed as not sufficient or ineffective to avoid the expected violation of operational security limit(s).

*According to section 57.3 of the EU HAR, this field can be filled in within 24 hours after the initial publication

Capacity Curtailment on the DK-NL border for delivery period 30-10-2025

by JAO

1. TSO(s)*:

TenneT_NL

2. Identification of affected Long Term Transmission Rights:

DK-NL

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

30-10-2025 19:00 - 20:00 180 MW

30-10-2025 20:00 - 21:00 180 MW

30-10-2025 21:00 - 22:00 180 MW

30-10-2025 22:00 - 23:00 180 MW

30-10-2025 23:00 - 24:00 180 MW

5. Amount of LTTR remaining after curtailment:

30-10-2025 19:00 - 20:00 0 MW

30-10-2025 20:00 - 21:00 0 MW

30-10-2025 21:00 - 22:00 0 MW

30-10-2025 22:00 - 23:00 0 MW

30-10-2025 23:00 - 24:00 0 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)*?

The remedial actions considered were assessed as not sufficient or ineffective to avoid the expected violation of operational security limit(s).

*According to section 57.3 of the EU HAR, this field can be filled in within 24 hours after the initial publication

Capacity Curtailment on the EE-LV border for delivery period 29-10-2025

by JAO

1. TSO(s)*:

ELERING

2. Identification of affected Long Term Transmission Rights:

EE-LV

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

29-10-2025 00:00 - 01:00 550 MW

29-10-2025 01:00 - 02:00 550 MW

29-10-2025 02:00 - 03:00 550 MW

29-10-2025 03:00 - 04:00 550 MW

29-10-2025 04:00 - 05:00 550 MW

29-10-2025 05:00 - 06:00 550 MW

29-10-2025 06:00 - 07:00 550 MW

29-10-2025 07:00 - 08:00 550 MW

29-10-2025 08:00 - 09:00 550 MW

29-10-2025 09:00 - 10:00 550 MW

29-10-2025 10:00 - 11:00 550 MW

29-10-2025 11:00 - 12:00 550 MW

29-10-2025 12:00 - 13:00 550 MW

29-10-2025 13:00 - 14:00 550 MW

29-10-2025 14:00 - 15:00 550 MW

29-10-2025 15:00 - 16:00 550 MW

29-10-2025 16:00 - 17:00 550 MW

29-10-2025 17:00 - 18:00 550 MW

29-10-2025 18:00 - 19:00 550 MW

29-10-2025 19:00 - 20:00 550 MW

29-10-2025 20:00 - 21:00 550 MW

29-10-2025 21:00 - 22:00 550 MW

29-10-2025 22:00 - 23:00 550 MW

29-10-2025 23:00 - 24:00 550 MW

5. Amount of LTTR remaining after curtailment:

29-10-2025 00:00 - 01:00 453 MW

29-10-2025 01:00 - 02:00 453 MW

29-10-2025 02:00 - 03:00 453 MW

29-10-2025 03:00 - 04:00 453 MW

29-10-2025 04:00 - 05:00 453 MW

29-10-2025 05:00 - 06:00 453 MW

29-10-2025 06:00 - 07:00 453 MW

29-10-2025 07:00 - 08:00 453 MW

29-10-2025 08:00 - 09:00 453 MW

29-10-2025 09:00 - 10:00 453 MW

29-10-2025 10:00 - 11:00 453 MW

29-10-2025 11:00 - 12:00 453 MW

29-10-2025 12:00 - 13:00 453 MW

29-10-2025 13:00 - 14:00 453 MW

29-10-2025 14:00 - 15:00 453 MW

29-10-2025 15:00 - 16:00 453 MW

29-10-2025 16:00 - 17:00 453 MW

29-10-2025 17:00 - 18:00 453 MW

29-10-2025 18:00 - 19:00 453 MW

29-10-2025 19:00 - 20:00 453 MW

29-10-2025 20:00 - 21:00 453 MW

29-10-2025 21:00 - 22:00 453 MW

29-10-2025 22:00 - 23:00 453 MW

29-10-2025 23:00 - 24:00 453 MW

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

https://umm.nordpoolgroup.com/#/messages?publicationDate=all&eventDate=custom&connections=EE-LV&eventDateStart=1970-01-01&eventDateStop=2125-04-20 , as well as the capacity already allocated on the Baltic Balancing Market for balancing capacity sharing at https://baltic.transparency-dashboard.eu/node/108

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

There is no alternative to the curtailment of the affected LTTRs.

Capacity Curtailment on the GR-IT border for delivery period 29-10-2025

by JAO

1. TSO(s)*:

TERNA, ADMIE

2. Identification of affected Long Term Transmission Rights:

GR-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

29-10-2025 00:00 - 01:00 50 MW

29-10-2025 01:00 - 02:00 50 MW

29-10-2025 02:00 - 03:00 50 MW

29-10-2025 03:00 - 04:00 50 MW

29-10-2025 04:00 - 05:00 50 MW

29-10-2025 05:00 - 06:00 50 MW

29-10-2025 06:00 - 07:00 50 MW

29-10-2025 07:00 - 08:00 50 MW

29-10-2025 08:00 - 09:00 50 MW

29-10-2025 09:00 - 10:00 50 MW

29-10-2025 10:00 - 11:00 50 MW

29-10-2025 11:00 - 12:00 50 MW

29-10-2025 12:00 - 13:00 50 MW

29-10-2025 13:00 - 14:00 50 MW

29-10-2025 14:00 - 15:00 50 MW

29-10-2025 15:00 - 16:00 50 MW

29-10-2025 16:00 - 17:00 50 MW

29-10-2025 17:00 - 18:00 50 MW

29-10-2025 18:00 - 19:00 50 MW

29-10-2025 19:00 - 20:00 50 MW

29-10-2025 20:00 - 21:00 50 MW

29-10-2025 21:00 - 22:00 50 MW

29-10-2025 22:00 - 23:00 50 MW

29-10-2025 23:00 - 24:00 50 MW

5. Amount of LTTR remaining after curtailment:

29-10-2025 00:00 - 01:00 0 MW

29-10-2025 01:00 - 02:00 0 MW

29-10-2025 02:00 - 03:00 0 MW

29-10-2025 03:00 - 04:00 0 MW

29-10-2025 04:00 - 05:00 0 MW

29-10-2025 05:00 - 06:00 0 MW

29-10-2025 06:00 - 07:00 0 MW

29-10-2025 07:00 - 08:00 0 MW

29-10-2025 08:00 - 09:00 0 MW

29-10-2025 09:00 - 10:00 0 MW

29-10-2025 10:00 - 11:00 0 MW

29-10-2025 11:00 - 12:00 0 MW

29-10-2025 12:00 - 13:00 0 MW

29-10-2025 13:00 - 14:00 0 MW

29-10-2025 14:00 - 15:00 0 MW

29-10-2025 15:00 - 16:00 0 MW

29-10-2025 16:00 - 17:00 0 MW

29-10-2025 17:00 - 18:00 0 MW

29-10-2025 18:00 - 19:00 0 MW

29-10-2025 19:00 - 20:00 0 MW

29-10-2025 20:00 - 21:00 0 MW

29-10-2025 21:00 - 22:00 0 MW

29-10-2025 22:00 - 23:00 0 MW

29-10-2025 23:00 - 24:00 0 MW

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

HVDC cable ARACTHOS – GALATINA

 

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 IT-GR border for delivery period 29-10-2025

by JAO

1. TSO(s)*:

TERNA, ADMIE

2. Identification of affected Long Term Transmission Rights:

IT-GR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

29-10-2025 00:00 - 01:00 50 MW

29-10-2025 01:00 - 02:00 50 MW

29-10-2025 02:00 - 03:00 50 MW

29-10-2025 03:00 - 04:00 50 MW

29-10-2025 04:00 - 05:00 50 MW

29-10-2025 05:00 - 06:00 50 MW

29-10-2025 06:00 - 07:00 50 MW

29-10-2025 07:00 - 08:00 50 MW

29-10-2025 08:00 - 09:00 50 MW

29-10-2025 09:00 - 10:00 50 MW

29-10-2025 10:00 - 11:00 50 MW

29-10-2025 11:00 - 12:00 50 MW

29-10-2025 12:00 - 13:00 50 MW

29-10-2025 13:00 - 14:00 50 MW

29-10-2025 14:00 - 15:00 50 MW

29-10-2025 15:00 - 16:00 50 MW

29-10-2025 16:00 - 17:00 50 MW

29-10-2025 17:00 - 18:00 50 MW

29-10-2025 18:00 - 19:00 50 MW

29-10-2025 19:00 - 20:00 50 MW

29-10-2025 20:00 - 21:00 50 MW

29-10-2025 21:00 - 22:00 50 MW

29-10-2025 22:00 - 23:00 50 MW

29-10-2025 23:00 - 24:00 50 MW

5. Amount of LTTR remaining after curtailment:

29-10-2025 00:00 - 01:00 0 MW

29-10-2025 01:00 - 02:00 0 MW

29-10-2025 02:00 - 03:00 0 MW

29-10-2025 03:00 - 04:00 0 MW

29-10-2025 04:00 - 05:00 0 MW

29-10-2025 05:00 - 06:00 0 MW

29-10-2025 06:00 - 07:00 0 MW

29-10-2025 07:00 - 08:00 0 MW

29-10-2025 08:00 - 09:00 0 MW

29-10-2025 09:00 - 10:00 0 MW

29-10-2025 10:00 - 11:00 0 MW

29-10-2025 11:00 - 12:00 0 MW

29-10-2025 12:00 - 13:00 0 MW

29-10-2025 13:00 - 14:00 0 MW

29-10-2025 14:00 - 15:00 0 MW

29-10-2025 15:00 - 16:00 0 MW

29-10-2025 16:00 - 17:00 0 MW

29-10-2025 17:00 - 18:00 0 MW

29-10-2025 18:00 - 19:00 0 MW

29-10-2025 19:00 - 20:00 0 MW

29-10-2025 20:00 - 21:00 0 MW

29-10-2025 21:00 - 22:00 0 MW

29-10-2025 22:00 - 23:00 0 MW

29-10-2025 23:00 - 24:00 0 MW

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

HVDC cable ARACTHOS – GALATINA

 

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 FR-ES border for delivery period 29-10-2025

by JAO

1. TSO(s)*:

RTE, REE

2. Identification of affected Long Term Transmission Rights:

FR-ES

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

29-10-2025 18:00 - 19:00 1750 MW

29-10-2025 19:00 - 20:00 1750 MW

29-10-2025 20:00 - 21:00 1750 MW

29-10-2025 21:00 - 22:00 1750 MW

29-10-2025 22:00 - 23:00 1750 MW

29-10-2025 23:00 - 24:00 1750 MW

5. Amount of LTTR remaining after curtailment:

29-10-2025 18:00 - 19:00 422 MW

29-10-2025 19:00 - 20:00 422 MW

29-10-2025 20:00 - 21:00 422 MW

29-10-2025 21:00 - 22:00 422 MW

29-10-2025 22:00 - 23:00 422 MW

29-10-2025 23:00 - 24:00 422 MW

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

   29/10/2025

      18:00-19:00 Network Security

      19:00-20:00 Network Security

      20:00-21:00 Network Security

      21:00-22:00 Network Security

      22:00-23:00 Network Security

      23:00-24:00 Network Security

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

*According to section 57.3 of the EU HAR, this field can be filled in within 24 hours after the initial publication

Resource Center

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

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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. 

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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.

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

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