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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 FR-CH border for delivery period 04-10-2025

Published: 02/10/2025 | 19:28 by JAO
Auction Calendar update

Published: 02/10/2025 | 18:10 by JAO
Capacity Curtailment on the DK-NL border for delivery period 04-10-2025

Published: 02/10/2025 | 15:56 by JAO
Capacity Curtailment on the DE-AT border for delivery period 04-10-2025

Published: 02/10/2025 | 15:54 by JAO
Capacity Curtailment on the EE-LV border for delivery period 03-10-2025

Published: 02/10/2025 | 12:14 by JAO
Capacity Curtailment on the IT-GR border for delivery period 03-10-2025

Published: 02/10/2025 | 08:00 by JAO
Capacity Curtailment on the GR-IT border for delivery period 03-10-2025

Published: 02/10/2025 | 08:00 by JAO

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1. TSO(s)*:

RTE, SWISSGRID

2. Identification of affected Long Term Transmission Rights:

FR-CH

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

04-10-2025 00:00 - 01:00 369 MW

04-10-2025 01:00 - 02:00 369 MW

04-10-2025 02:00 - 03:00 369 MW

04-10-2025 03:00 - 04:00 369 MW

04-10-2025 04:00 - 05:00 369 MW

04-10-2025 05:00 - 06:00 369 MW

04-10-2025 06:00 - 07:00 369 MW

04-10-2025 07:00 - 08:00 369 MW

04-10-2025 08:00 - 09:00 369 MW

04-10-2025 09:00 - 10:00 369 MW

04-10-2025 10:00 - 11:00 369 MW

04-10-2025 11:00 - 12:00 369 MW

04-10-2025 12:00 - 13:00 369 MW

04-10-2025 13:00 - 14:00 369 MW

04-10-2025 14:00 - 15:00 369 MW

04-10-2025 15:00 - 16:00 369 MW

04-10-2025 16:00 - 17:00 369 MW

04-10-2025 17:00 - 18:00 369 MW

04-10-2025 18:00 - 19:00 369 MW

04-10-2025 19:00 - 20:00 369 MW

04-10-2025 20:00 - 21:00 369 MW

04-10-2025 21:00 - 22:00 369 MW

04-10-2025 22:00 - 23:00 369 MW

04-10-2025 23:00 - 24:00 369 MW

5. Amount of LTTR remaining after curtailment:

04-10-2025 00:00 - 01:00 0 MW

04-10-2025 01:00 - 02:00 0 MW

04-10-2025 02:00 - 03:00 0 MW

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

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

04-10-2025 05:00 - 06:00 0 MW

04-10-2025 06:00 - 07:00 0 MW

04-10-2025 07:00 - 08:00 0 MW

04-10-2025 08:00 - 09:00 0 MW

04-10-2025 09:00 - 10:00 0 MW

04-10-2025 10:00 - 11:00 0 MW

04-10-2025 11:00 - 12:00 0 MW

04-10-2025 12:00 - 13:00 0 MW

04-10-2025 13:00 - 14:00 0 MW

04-10-2025 14:00 - 15:00 0 MW

04-10-2025 15:00 - 16:00 0 MW

04-10-2025 16:00 - 17:00 0 MW

04-10-2025 17:00 - 18:00 0 MW

04-10-2025 18:00 - 19:00 0 MW

04-10-2025 19:00 - 20:00 0 MW

04-10-2025 20:00 - 21:00 0 MW

04-10-2025 21:00 - 22:00 0 MW

04-10-2025 22:00 - 23:00 0 MW

04-10-2025 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*:
04/10/2025

00:00-01:00 Network Security

01:00-02:00 Network Security

02:00-03:00 Network Security

03:00-04:00 Network Security

04:00-05:00 Network Security

05:00-06:00 Network Security

06:00-07:00 Network Security

07:00-08:00 Network Security

08:00-09:00 Network Security

09:00-10:00 Network Security

10:00-11:00 Network Security

11:00-12:00 Network Security

12:00-13:00 Network Security

13:00-14:00 Network Security

14:00-15:00 Network Security

15:00-16:00 Network Security

16:00-17:00 Network Security

17:00-18:00 Network Security

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

Dear Market Participants,

We would like to inform you that as per TSOs request, the 2025 Auction Calendar has been updated on the corridor IF2-FR<>GB and the below auctions have been cancelled:

IF2-FR-GB-Y-BASE---260101-08

IF2-GB-FR-Y-BASE---260101-08

IF2-GB-FR-M-BASE---251101-01

IF2-FR-GB-M-BASE---251101-01

For more details please refer to the Auction Calendar on our webpage http://www.jao.eu/auctions#/calendar/table to find its latest version.

Kind regards,

JAO Operations Team

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:

04-10-2025 07:00 - 08:00 300 MW

04-10-2025 08:00 - 09:00 300 MW

04-10-2025 09:00 - 10:00 300 MW

04-10-2025 10:00 - 11:00 300 MW

04-10-2025 11:00 - 12:00 300 MW

04-10-2025 12:00 - 13:00 300 MW

04-10-2025 13:00 - 14:00 300 MW

04-10-2025 14:00 - 15:00 300 MW

04-10-2025 15:00 - 16:00 300 MW

04-10-2025 16:00 - 17:00 300 MW

5. Amount of LTTR remaining after curtailment:

04-10-2025 07:00 - 08:00 0 MW

04-10-2025 08:00 - 09:00 0 MW

04-10-2025 09:00 - 10:00 0 MW

04-10-2025 10:00 - 11:00 0 MW

04-10-2025 11:00 - 12:00 0 MW

04-10-2025 12:00 - 13:00 0 MW

04-10-2025 13:00 - 14:00 0 MW

04-10-2025 14:00 - 15:00 0 MW

04-10-2025 15:00 - 16:00 0 MW

04-10-2025 16:00 - 17:00 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

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:

04-10-2025 00:00 - 01:00 4819 MW

04-10-2025 01:00 - 02:00 4819 MW

04-10-2025 02:00 - 03:00 4819 MW

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

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

04-10-2025 05:00 - 06:00 4819 MW

04-10-2025 06:00 - 07:00 4819 MW

04-10-2025 07:00 - 08:00 4819 MW

04-10-2025 08:00 - 09:00 4819 MW

04-10-2025 09:00 - 10:00 4819 MW

04-10-2025 10:00 - 11:00 4819 MW

04-10-2025 11:00 - 12:00 4819 MW

04-10-2025 12:00 - 13:00 4819 MW

04-10-2025 13:00 - 14:00 4819 MW

04-10-2025 14:00 - 15:00 4819 MW

04-10-2025 15:00 - 16:00 4819 MW

04-10-2025 16:00 - 17:00 4819 MW

04-10-2025 17:00 - 18:00 4819 MW

04-10-2025 18:00 - 19:00 4819 MW

04-10-2025 19:00 - 20:00 4819 MW

04-10-2025 20:00 - 21:00 4819 MW

04-10-2025 21:00 - 22:00 4819 MW

04-10-2025 22:00 - 23:00 4819 MW

04-10-2025 23:00 - 24:00 4819 MW

5. Amount of LTTR remaining after curtailment:

04-10-2025 00:00 - 01:00 4056 MW

04-10-2025 01:00 - 02:00 4056 MW

04-10-2025 02:00 - 03:00 4056 MW

04-10-2025 03:00 - 04:00 4056 MW

04-10-2025 04:00 - 05:00 4056 MW

04-10-2025 05:00 - 06:00 4056 MW

04-10-2025 06:00 - 07:00 4056 MW

04-10-2025 07:00 - 08:00 4056 MW

04-10-2025 08:00 - 09:00 4056 MW

04-10-2025 09:00 - 10:00 4056 MW

04-10-2025 10:00 - 11:00 4056 MW

04-10-2025 11:00 - 12:00 4056 MW

04-10-2025 12:00 - 13:00 4056 MW

04-10-2025 13:00 - 14:00 4056 MW

04-10-2025 14:00 - 15:00 4056 MW

04-10-2025 15:00 - 16:00 4056 MW

04-10-2025 16:00 - 17:00 4056 MW

04-10-2025 17:00 - 18:00 4056 MW

04-10-2025 18:00 - 19:00 4056 MW

04-10-2025 19:00 - 20:00 4056 MW

04-10-2025 20:00 - 21:00 4056 MW

04-10-2025 21:00 - 22:00 4056 MW

04-10-2025 22:00 - 23:00 4056 MW

04-10-2025 23:00 - 24:00 4056 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

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:

03-10-2025 00:00 - 01:00 550 MW

03-10-2025 01:00 - 02:00 550 MW

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

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

03-10-2025 04:00 - 05:00 550 MW

03-10-2025 05:00 - 06:00 550 MW

03-10-2025 06:00 - 07:00 550 MW

03-10-2025 07:00 - 08:00 550 MW

03-10-2025 08:00 - 09:00 550 MW

03-10-2025 09:00 - 10:00 550 MW

03-10-2025 10:00 - 11:00 550 MW

03-10-2025 11:00 - 12:00 550 MW

03-10-2025 12:00 - 13:00 550 MW

03-10-2025 13:00 - 14:00 550 MW

03-10-2025 14:00 - 15:00 550 MW

03-10-2025 15:00 - 16:00 550 MW

03-10-2025 16:00 - 17:00 550 MW

03-10-2025 17:00 - 18:00 550 MW

03-10-2025 18:00 - 19:00 550 MW

03-10-2025 19:00 - 20:00 550 MW

03-10-2025 20:00 - 21:00 550 MW

03-10-2025 21:00 - 22:00 550 MW

03-10-2025 22:00 - 23:00 550 MW

03-10-2025 23:00 - 24:00 550 MW

5. Amount of LTTR remaining after curtailment:

03-10-2025 00:00 - 01:00 491 MW

03-10-2025 01:00 - 02:00 491 MW

03-10-2025 02:00 - 03:00 517 MW

03-10-2025 03:00 - 04:00 491 MW

03-10-2025 04:00 - 05:00 513 MW

03-10-2025 05:00 - 06:00 517 MW

03-10-2025 06:00 - 07:00 517 MW

03-10-2025 07:00 - 08:00 517 MW

03-10-2025 08:00 - 09:00 517 MW

03-10-2025 09:00 - 10:00 517 MW

03-10-2025 10:00 - 11:00 506 MW

03-10-2025 11:00 - 12:00 491 MW

03-10-2025 12:00 - 13:00 491 MW

03-10-2025 13:00 - 14:00 491 MW

03-10-2025 14:00 - 15:00 491 MW

03-10-2025 15:00 - 16:00 517 MW

03-10-2025 16:00 - 17:00 517 MW

03-10-2025 17:00 - 18:00 517 MW

03-10-2025 18:00 - 19:00 517 MW

03-10-2025 19:00 - 20:00 517 MW

03-10-2025 20:00 - 21:00 517 MW

03-10-2025 21:00 - 22:00 517 MW

03-10-2025 22:00 - 23:00 517 MW

03-10-2025 23:00 - 24:00 491 MW

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

Please see the latest day-ahead net transfer capacity values published on the Nord Pool UMM Platform under "Unavailability of electricity facilities: Transmission EE → LV" at

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.

*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

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:

03-10-2025 00:00 - 01:00 50 MW

03-10-2025 01:00 - 02:00 50 MW

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

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

03-10-2025 04:00 - 05:00 50 MW

03-10-2025 05:00 - 06:00 50 MW

03-10-2025 06:00 - 07:00 50 MW

03-10-2025 07:00 - 08:00 50 MW

03-10-2025 08:00 - 09:00 50 MW

03-10-2025 09:00 - 10:00 50 MW

03-10-2025 10:00 - 11:00 50 MW

03-10-2025 11:00 - 12:00 50 MW

03-10-2025 12:00 - 13:00 50 MW

03-10-2025 13:00 - 14:00 50 MW

03-10-2025 14:00 - 15:00 50 MW

03-10-2025 15:00 - 16:00 50 MW

03-10-2025 16:00 - 17:00 50 MW

03-10-2025 17:00 - 18:00 50 MW

03-10-2025 18:00 - 19:00 50 MW

03-10-2025 19:00 - 20:00 50 MW

03-10-2025 20:00 - 21:00 50 MW

03-10-2025 21:00 - 22:00 50 MW

03-10-2025 22:00 - 23:00 50 MW

03-10-2025 23:00 - 24:00 50 MW

5. Amount of LTTR remaining after curtailment:

03-10-2025 00:00 - 01:00 0 MW

03-10-2025 01:00 - 02:00 0 MW

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

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

03-10-2025 04:00 - 05:00 0 MW

03-10-2025 05:00 - 06:00 0 MW

03-10-2025 06:00 - 07:00 0 MW

03-10-2025 07:00 - 08:00 0 MW

03-10-2025 08:00 - 09:00 0 MW

03-10-2025 09:00 - 10:00 0 MW

03-10-2025 10:00 - 11:00 0 MW

03-10-2025 11:00 - 12:00 0 MW

03-10-2025 12:00 - 13:00 0 MW

03-10-2025 13:00 - 14:00 0 MW

03-10-2025 14:00 - 15:00 0 MW

03-10-2025 15:00 - 16:00 0 MW

03-10-2025 16:00 - 17:00 0 MW

03-10-2025 17:00 - 18:00 0 MW

03-10-2025 18:00 - 19:00 0 MW

03-10-2025 19:00 - 20:00 0 MW

03-10-2025 20:00 - 21:00 0 MW

03-10-2025 21:00 - 22:00 0 MW

03-10-2025 22:00 - 23:00 0 MW

03-10-2025 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)*?

Not Applicable

1. TSO(s)*:

TERNA

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:

03-10-2025 00:00 - 01:00 50 MW

03-10-2025 01:00 - 02:00 50 MW

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

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

03-10-2025 04:00 - 05:00 50 MW

03-10-2025 05:00 - 06:00 50 MW

03-10-2025 06:00 - 07:00 50 MW

03-10-2025 07:00 - 08:00 50 MW

03-10-2025 08:00 - 09:00 50 MW

03-10-2025 09:00 - 10:00 50 MW

03-10-2025 10:00 - 11:00 50 MW

03-10-2025 11:00 - 12:00 50 MW

03-10-2025 12:00 - 13:00 50 MW

03-10-2025 13:00 - 14:00 50 MW

03-10-2025 14:00 - 15:00 50 MW

03-10-2025 15:00 - 16:00 50 MW

03-10-2025 16:00 - 17:00 50 MW

03-10-2025 17:00 - 18:00 50 MW

03-10-2025 18:00 - 19:00 50 MW

03-10-2025 19:00 - 20:00 50 MW

03-10-2025 20:00 - 21:00 50 MW

03-10-2025 21:00 - 22:00 50 MW

03-10-2025 22:00 - 23:00 50 MW

03-10-2025 23:00 - 24:00 50 MW

5. Amount of LTTR remaining after curtailment:

03-10-2025 00:00 - 01:00 0 MW

03-10-2025 01:00 - 02:00 0 MW

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

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

03-10-2025 04:00 - 05:00 0 MW

03-10-2025 05:00 - 06:00 0 MW

03-10-2025 06:00 - 07:00 0 MW

03-10-2025 07:00 - 08:00 0 MW

03-10-2025 08:00 - 09:00 0 MW

03-10-2025 09:00 - 10:00 0 MW

03-10-2025 10:00 - 11:00 0 MW

03-10-2025 11:00 - 12:00 0 MW

03-10-2025 12:00 - 13:00 0 MW

03-10-2025 13:00 - 14:00 0 MW

03-10-2025 14:00 - 15:00 0 MW

03-10-2025 15:00 - 16:00 0 MW

03-10-2025 16:00 - 17:00 0 MW

03-10-2025 17:00 - 18:00 0 MW

03-10-2025 18:00 - 19:00 0 MW

03-10-2025 19:00 - 20:00 0 MW

03-10-2025 20:00 - 21:00 0 MW

03-10-2025 21:00 - 22:00 0 MW

03-10-2025 22:00 - 23:00 0 MW

03-10-2025 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)*?

Not Applicable

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