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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

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 DK-NL& NL-DK border for delivery period 16-07-2025

Published: 14/07/2025 | 13:38 by JAO
Capacity Curtailment on the FR-IT border for delivery period 15-07-2025

Published: 14/07/2025 | 07:26 by JAO
Publication of IDCC (b) data for Business Day 14/07/2025

Published: 13/07/2025 | 22:32 by JAO
Capacity Curtailment on the DK-NL & NL-DK border for delivery period 15-07-2025

Published: 13/07/2025 | 13:28 by JAO
Capacity Curtailment on the EL1-GB-FR border for delivery period 15-07-2025

Published: 13/07/2025 | 07:38 by JAO
Capacity Curtailment on the EL1-FR-GB border for delivery period 15-07-2025

Published: 13/07/2025 | 07:38 by JAO
Capacity Curtailment on the IT-SI border for delivery period 14-07-2025

Published: 13/07/2025 | 07:38 by JAO

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1. TSO(s)*:

TenneT TSO B.V.

2. Identification of affected Long Term Transmission Rights:

NL-DK & DK-NL

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

16-07-2025 00:00 - 01:00 300 MW

16-07-2025 01:00 - 02:00 300 MW

16-07-2025 02:00 - 03:00 300 MW

16-07-2025 03:00 - 04:00 300 MW

16-07-2025 04:00 - 05:00 300 MW

16-07-2025 05:00 - 06:00 300 MW

16-07-2025 06:00 - 07:00 300 MW

16-07-2025 07:00 - 08:00 300 MW

16-07-2025 08:00 - 09:00 300 MW

16-07-2025 09:00 - 10:00 300 MW

16-07-2025 10:00 - 11:00 300 MW

16-07-2025 11:00 - 12:00 300 MW

16-07-2025 12:00 - 13:00 300 MW

16-07-2025 13:00 - 14:00 300 MW

16-07-2025 14:00 - 15:00 300 MW

16-07-2025 15:00 - 16:00 300 MW

16-07-2025 16:00 - 17:00 300 MW

16-07-2025 17:00 - 18:00 300 MW

16-07-2025 18:00 - 19:00 300 MW

16-07-2025 19:00 - 20:00 300 MW

16-07-2025 20:00 - 21:00 300 MW

16-07-2025 21:00 - 22:00 300 MW

16-07-2025 22:00 - 23:00 300 MW

16-07-2025 23:00 - 24:00 300 MW

5. Amount of LTTR remaining after curtailment:

16-07-2025 00:00 - 01:00 0 MW

16-07-2025 01:00 - 02:00 0 MW

16-07-2025 02:00 - 03:00 0 MW

16-07-2025 03:00 - 04:00 0 MW

16-07-2025 04:00 - 05:00 0 MW

16-07-2025 05:00 - 06:00 0 MW

16-07-2025 06:00 - 07:00 0 MW

16-07-2025 07:00 - 08:00 0 MW

16-07-2025 08:00 - 09:00 0 MW

16-07-2025 09:00 - 10:00 0 MW

16-07-2025 10:00 - 11:00 0 MW

16-07-2025 11:00 - 12:00 0 MW

16-07-2025 12:00 - 13:00 0 MW

16-07-2025 13:00 - 14:00 0 MW

16-07-2025 14:00 - 15:00 0 MW

16-07-2025 15:00 - 16:00 0 MW

16-07-2025 16:00 - 17:00 0 MW

16-07-2025 17:00 - 18:00 0 MW

16-07-2025 18:00 - 19:00 0 MW

16-07-2025 19:00 - 20:00 0 MW

16-07-2025 20:00 - 21:00 0 MW

16-07-2025 21:00 - 22:00 0 MW

16-07-2025 22:00 - 23:00 0 MW

16-07-2025 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).

1. TSO(s)*:

TERNA, RTE, APG, SWISSIGRID, ELES

2. Identification of affected Long Term Transmission Rights:

FR-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

15-07-2025 00:00 - 01:00 2120 MW

15-07-2025 01:00 - 02:00 2120 MW

15-07-2025 02:00 - 03:00 2120 MW

15-07-2025 18:00 - 19:00 2120 MW

15-07-2025 19:00 - 20:00 2120 MW

15-07-2025 20:00 - 21:00 2120 MW

15-07-2025 23:00 - 24:00 2120 MW

5. Amount of LTTR remaining after curtailment:

15-07-2025 00:00 - 01:00 2034 MW

15-07-2025 01:00 - 02:00 2034 MW

15-07-2025 02:00 - 03:00 2034 MW

15-07-2025 18:00 - 19:00 1738 MW

15-07-2025 19:00 - 20:00 1738 MW

15-07-2025 20:00 - 21:00 1738 MW

15-07-2025 23:00 - 24:00 1919 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

Dear Market Participants,

We would like to inform you that Validation Reductions ATC data for the delivery date of 14/07/2025, for the Core ID CCR IDCC (b) Publication Tool will be published with a delay.

Thank you for your understanding.

Kind regards,

JAO Operations

1. TSO(s)*:

TenneT TSO B.V.

2. Identification of affected Long Term Transmission Rights:

DK-NL & NL-DK

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

15-07-2025 00:00 - 01:00 300 MW

15-07-2025 01:00 - 02:00 300 MW

15-07-2025 02:00 - 03:00 300 MW

15-07-2025 03:00 - 04:00 300 MW

15-07-2025 04:00 - 05:00 300 MW

15-07-2025 05:00 - 06:00 300 MW

15-07-2025 06:00 - 07:00 300 MW

15-07-2025 07:00 - 08:00 300 MW

15-07-2025 08:00 - 09:00 300 MW

15-07-2025 09:00 - 10:00 300 MW

15-07-2025 10:00 - 11:00 300 MW

15-07-2025 11:00 - 12:00 300 MW

15-07-2025 12:00 - 13:00 300 MW

15-07-2025 13:00 - 14:00 300 MW

15-07-2025 14:00 - 15:00 300 MW

15-07-2025 15:00 - 16:00 300 MW

15-07-2025 16:00 - 17:00 300 MW

15-07-2025 17:00 - 18:00 300 MW

15-07-2025 18:00 - 19:00 300 MW

15-07-2025 19:00 - 20:00 300 MW

15-07-2025 20:00 - 21:00 300 MW

15-07-2025 21:00 - 22:00 300 MW

15-07-2025 22:00 - 23:00 300 MW

15-07-2025 23:00 - 24:00 300 MW

5. Amount of LTTR remaining after curtailment:

15-07-2025 00:00 - 01:00 0 MW

15-07-2025 01:00 - 02:00 0 MW

15-07-2025 02:00 - 03:00 0 MW

15-07-2025 03:00 - 04:00 0 MW

15-07-2025 04:00 - 05:00 0 MW

15-07-2025 05:00 - 06:00 0 MW

15-07-2025 06:00 - 07:00 0 MW

15-07-2025 07:00 - 08:00 0 MW

15-07-2025 08:00 - 09:00 0 MW

15-07-2025 09:00 - 10:00 0 MW

15-07-2025 10:00 - 11:00 0 MW

15-07-2025 11:00 - 12:00 0 MW

15-07-2025 12:00 - 13:00 0 MW

15-07-2025 13:00 - 14:00 0 MW

15-07-2025 14:00 - 15:00 0 MW

15-07-2025 15:00 - 16:00 0 MW

15-07-2025 16:00 - 17:00 0 MW

15-07-2025 17:00 - 18:00 0 MW

15-07-2025 18:00 - 19:00 0 MW

15-07-2025 19:00 - 20:00 0 MW

15-07-2025 20:00 - 21:00 0 MW

15-07-2025 21:00 - 22:00 0 MW

15-07-2025 22:00 - 23:00 0 MW

15-07-2025 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).

1. TSO(s)*:

ELECLINK

2. Identification of affected Long Term Transmission Rights:

EL1-GB-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

15-07-2025 00:00 - 01:00 963 MW

15-07-2025 01:00 - 02:00 963 MW

15-07-2025 02:00 - 03:00 963 MW

15-07-2025 03:00 - 04:00 963 MW

15-07-2025 04:00 - 05:00 963 MW

15-07-2025 05:00 - 06:00 963 MW

15-07-2025 06:00 - 07:00 963 MW

15-07-2025 07:00 - 08:00 963 MW

15-07-2025 08:00 - 09:00 963 MW

15-07-2025 09:00 - 10:00 963 MW

15-07-2025 10:00 - 11:00 963 MW

5. Amount of LTTR remaining after curtailment:

15-07-2025 00:00 - 01:00 0 MW

15-07-2025 01:00 - 02:00 0 MW

15-07-2025 02:00 - 03:00 0 MW

15-07-2025 03:00 - 04:00 0 MW

15-07-2025 04:00 - 05:00 0 MW

15-07-2025 05:00 - 06:00 0 MW

15-07-2025 06:00 - 07:00 0 MW

15-07-2025 07:00 - 08:00 0 MW

15-07-2025 08:00 - 09:00 0 MW

15-07-2025 09:00 - 10:00 0 MW

15-07-2025 10:00 - 11:00 0 MW

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

Planned Outage

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

Maintenance for a Planned Outage

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

1. TSO(s)*:

ELECLINK

2. Identification of affected Long Term Transmission Rights:

EL1-FR-GB

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

15-07-2025 00:00 - 01:00 964 MW

15-07-2025 01:00 - 02:00 964 MW

15-07-2025 02:00 - 03:00 964 MW

15-07-2025 03:00 - 04:00 964 MW

15-07-2025 04:00 - 05:00 964 MW

15-07-2025 05:00 - 06:00 964 MW

15-07-2025 06:00 - 07:00 964 MW

15-07-2025 07:00 - 08:00 964 MW

15-07-2025 08:00 - 09:00 964 MW

15-07-2025 09:00 - 10:00 964 MW

15-07-2025 10:00 - 11:00 964 MW

5. Amount of LTTR remaining after curtailment:

15-07-2025 00:00 - 01:00 0 MW

15-07-2025 01:00 - 02:00 0 MW

15-07-2025 02:00 - 03:00 0 MW

15-07-2025 03:00 - 04:00 0 MW

15-07-2025 04:00 - 05:00 0 MW

15-07-2025 05:00 - 06:00 0 MW

15-07-2025 06:00 - 07:00 0 MW

15-07-2025 07:00 - 08:00 0 MW

15-07-2025 08:00 - 09:00 0 MW

15-07-2025 09:00 - 10:00 0 MW

15-07-2025 10:00 - 11:00 0 MW

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

7. Why alternative measures are not sufficient 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

1. TSO(s)*:

TERNA, RTE, APG, SWISSIGRID, ELES

2. Identification of affected Long Term Transmission Rights:

IT-SI

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

14-07-2025 00:00 - 01:00 315 MW

14-07-2025 01:00 - 02:00 315 MW

14-07-2025 02:00 - 03:00 315 MW

14-07-2025 03:00 - 04:00 315 MW

14-07-2025 04:00 - 05:00 315 MW

14-07-2025 05:00 - 06:00 315 MW

14-07-2025 06:00 - 07:00 315 MW

14-07-2025 07:00 - 08:00 315 MW

14-07-2025 08:00 - 09:00 315 MW

14-07-2025 09:00 - 10:00 315 MW

14-07-2025 10:00 - 11:00 315 MW

14-07-2025 11:00 - 12:00 315 MW

14-07-2025 12:00 - 13:00 315 MW

14-07-2025 13:00 - 14:00 315 MW

14-07-2025 14:00 - 15:00 315 MW

14-07-2025 15:00 - 16:00 315 MW

14-07-2025 16:00 - 17:00 315 MW

14-07-2025 17:00 - 18:00 315 MW

14-07-2025 18:00 - 19:00 315 MW

14-07-2025 19:00 - 20:00 315 MW

14-07-2025 20:00 - 21:00 315 MW

14-07-2025 21:00 - 22:00 315 MW

14-07-2025 22:00 - 23:00 315 MW

14-07-2025 23:00 - 24:00 315 MW

5. Amount of LTTR remaining after curtailment:

14-07-2025 00:00 - 01:00 315 MW

14-07-2025 01:00 - 02:00 315 MW

14-07-2025 02:00 - 03:00 315 MW

14-07-2025 03:00 - 04:00 315 MW

14-07-2025 04:00 - 05:00 315 MW

14-07-2025 05:00 - 06:00 315 MW

14-07-2025 06:00 - 07:00 315 MW

14-07-2025 07:00 - 08:00 315 MW

14-07-2025 08:00 - 09:00 315 MW

14-07-2025 09:00 - 10:00 315 MW

14-07-2025 10:00 - 11:00 315 MW

14-07-2025 11:00 - 12:00 315 MW

14-07-2025 12:00 - 13:00 315 MW

14-07-2025 13:00 - 14:00 315 MW

14-07-2025 14:00 - 15:00 315 MW

14-07-2025 15:00 - 16:00 315 MW

14-07-2025 16:00 - 17:00 315 MW

14-07-2025 17:00 - 18:00 315 MW

14-07-2025 18:00 - 19:00 315 MW

14-07-2025 19:00 - 20:00 315 MW

14-07-2025 20:00 - 21:00 315 MW

14-07-2025 21:00 - 22:00 315 MW

14-07-2025 22:00 - 23:00 315 MW

14-07-2025 23:00 - 24:00 315 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

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.

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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