See Our

Annual Report

Read here

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

470+

Registered Market Participants
20k+

Auctions per year
100 %

Auction Tool Availability
95

Employees
50

TSOs serviced

Latest market messages

Go to Message Board

Capacity Curtailment on the IF1-GB-FR and IF1-FR-GB border for delivery period 02-05-2025

Published: 30/04/2025 | 17:10 by JAO
Daily Curtailment Notification for Market Period 01/05/2025 - (FR-ES, GR-IT, IT-GR, SI-IT, FR-IT, AT-IT, CH-IT)

Published: 30/04/2025 | 07:07 by JAO
2025 Auction Calendar update

Published: 29/04/2025 | 15:31 by JAO
Capacity Curtailment on the EE-LV border for delivery period 30-04-2025

Published: 29/04/2025 | 10:38 by JAO
Daily Curtailment Notification for Market Period 30/04/2025 - (ES-FR, FR-ES, IT-GR, GR-IT, CH-IT)

Published: 29/04/2025 | 08:36 by JAO
Publication of IDCC (b) data for Business Day 29/04/2025

Published: 28/04/2025 | 23:34 by JAO
2025 Auction Calendar update

Published: 28/04/2025 | 22:18 by JAO

Go to Message board

1. TSO(s)*:

NGIC and RTE-TSO

2. Identification of affected Long Term Transmission Rights:

IF1-FR-GB

IF1-GB-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

IF1-FR-GB

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

02-05-2025 00:00 - 01:00 1950 MW

02-05-2025 01:00 - 02:00 1950 MW

02-05-2025 02:00 - 03:00 1950 MW

02-05-2025 03:00 - 04:00 1950 MW

02-05-2025 04:00 - 05:00 1950 MW

02-05-2025 05:00 - 06:00 1950 MW

02-05-2025 06:00 - 07:00 1950 MW

02-05-2025 07:00 - 08:00 1950 MW

02-05-2025 08:00 - 09:00 1950 MW

02-05-2025 09:00 - 10:00 1950 MW

02-05-2025 10:00 - 11:00 1950 MW

02-05-2025 11:00 - 12:00 1950 MW

02-05-2025 12:00 - 13:00 1950 MW

02-05-2025 13:00 - 14:00 1950 MW

02-05-2025 14:00 - 15:00 1950 MW

02-05-2025 15:00 - 16:00 1950 MW

02-05-2025 16:00 - 17:00 1950 MW

5. Amount of LTTR remaining after curtailment:

02-05-2025 00:00 - 01:00 1470 MW

02-05-2025 01:00 - 02:00 1470 MW

02-05-2025 02:00 - 03:00 1470 MW

02-05-2025 03:00 - 04:00 1470 MW

02-05-2025 04:00 - 05:00 1470 MW

02-05-2025 05:00 - 06:00 1470 MW

02-05-2025 06:00 - 07:00 1470 MW

02-05-2025 07:00 - 08:00 1470 MW

02-05-2025 08:00 - 09:00 1470 MW

02-05-2025 09:00 - 10:00 1470 MW

02-05-2025 10:00 - 11:00 1470 MW

02-05-2025 11:00 - 12:00 1470 MW

02-05-2025 12:00 - 13:00 1470 MW

02-05-2025 13:00 - 14:00 1470 MW

02-05-2025 14:00 - 15:00 1470 MW

02-05-2025 15:00 - 16:00 1470 MW

02-05-2025 16:00 - 17:00 1470 MW

IF1-GB-FR

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

02-05-2025 00:00 - 01:00 1949 MW

02-05-2025 01:00 - 02:00 1949 MW

02-05-2025 02:00 - 03:00 1949 MW

02-05-2025 03:00 - 04:00 1949 MW

02-05-2025 04:00 - 05:00 1949 MW

02-05-2025 05:00 - 06:00 1949 MW

02-05-2025 06:00 - 07:00 1949 MW

02-05-2025 07:00 - 08:00 1949 MW

02-05-2025 08:00 - 09:00 1949 MW

02-05-2025 09:00 - 10:00 1949 MW

02-05-2025 10:00 - 11:00 1949 MW

02-05-2025 11:00 - 12:00 1949 MW

02-05-2025 12:00 - 13:00 1949 MW

02-05-2025 13:00 - 14:00 1949 MW

02-05-2025 14:00 - 15:00 1949 MW

02-05-2025 15:00 - 16:00 1949 MW

02-05-2025 16:00 - 17:00 1949 MW

5. Amount of LTTR remaining after curtailment:

02-05-2025 00:00 - 01:00 1445 MW

02-05-2025 01:00 - 02:00 1445 MW

02-05-2025 02:00 - 03:00 1445 MW

02-05-2025 03:00 - 04:00 1445 MW

02-05-2025 04:00 - 05:00 1445 MW

02-05-2025 05:00 - 06:00 1445 MW

02-05-2025 06:00 - 07:00 1445 MW

02-05-2025 07:00 - 08:00 1445 MW

02-05-2025 08:00 - 09:00 1445 MW

02-05-2025 09:00 - 10:00 1445 MW

02-05-2025 10:00 - 11:00 1445 MW

02-05-2025 11:00 - 12:00 1445 MW

02-05-2025 12:00 - 13:00 1445 MW

02-05-2025 13:00 - 14:00 1445 MW

02-05-2025 14:00 - 15:00 1445 MW

02-05-2025 15:00 - 16:00 1445 MW

02-05-2025 16:00 - 17:00 1445 MW

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

Thermal Limits

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

Capacity limitation due to unplanned maintenance

*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 FR-ES border for delivery period 01-05-2025

1. TSO(s)*:
RTE-TSO, 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:
01-05-2025 15:00 - 16:00 2440 MW
01-05-2025 16:00 - 17:00 2440 MW
01-05-2025 17:00 - 18:00 2440 MW
01-05-2025 18:00 - 19:00 2440 MW

5. Amount of LTTR remaining after curtailment:
01-05-2025 15:00 - 16:00 2359 MW
01-05-2025 16:00 - 17:00 2359 MW
01-05-2025 17:00 - 18:00 2359 MW
01-05-2025 18:00 - 19:00 2359 MW

6. Information on exact operational limit(s) that are expected to be violated in the absence of curtailment :
01/05/2025
15:00-16:00 Network Security
16:00-17:00 Network Security
17:00-18:00 Network Security
18:00-19:00 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

Capacity Curtailment on the GR-IT border for delivery period 01-05-2025

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:
01-05-2025 00:00 - 01:00 50 MW
01-05-2025 01:00 - 02:00 50 MW
01-05-2025 02:00 - 03:00 50 MW
01-05-2025 03:00 - 04:00 50 MW
01-05-2025 04:00 - 05:00 50 MW
01-05-2025 05:00 - 06:00 50 MW
01-05-2025 06:00 - 07:00 50 MW
01-05-2025 07:00 - 08:00 50 MW
01-05-2025 08:00 - 09:00 50 MW
01-05-2025 09:00 - 10:00 50 MW
01-05-2025 10:00 - 11:00 50 MW
01-05-2025 11:00 - 12:00 50 MW
01-05-2025 12:00 - 13:00 50 MW
01-05-2025 13:00 - 14:00 50 MW
01-05-2025 14:00 - 15:00 50 MW
01-05-2025 15:00 - 16:00 50 MW
01-05-2025 16:00 - 17:00 50 MW
01-05-2025 17:00 - 18:00 50 MW
01-05-2025 18:00 - 19:00 50 MW
01-05-2025 19:00 - 20:00 50 MW
01-05-2025 20:00 - 21:00 50 MW
01-05-2025 21:00 - 22:00 50 MW
01-05-2025 22:00 - 23:00 50 MW
01-05-2025 23:00 - 24:00 50 MW

5. Amount of LTTR remaining after curtailment:
01-05-2025 00:00 - 01:00 0 MW
01-05-2025 01:00 - 02:00 0 MW
01-05-2025 02:00 - 03:00 0 MW
01-05-2025 03:00 - 04:00 0 MW
01-05-2025 04:00 - 05:00 0 MW
01-05-2025 05:00 - 06:00 0 MW
01-05-2025 06:00 - 07:00 0 MW
01-05-2025 07:00 - 08:00 0 MW
01-05-2025 08:00 - 09:00 0 MW
01-05-2025 09:00 - 10:00 0 MW
01-05-2025 10:00 - 11:00 0 MW
01-05-2025 11:00 - 12:00 0 MW
01-05-2025 12:00 - 13:00 0 MW
01-05-2025 13:00 - 14:00 0 MW
01-05-2025 14:00 - 15:00 0 MW
01-05-2025 15:00 - 16:00 0 MW
01-05-2025 16:00 - 17:00 0 MW
01-05-2025 17:00 - 18:00 0 MW
01-05-2025 18:00 - 19:00 0 MW
01-05-2025 19:00 - 20:00 0 MW
01-05-2025 20:00 - 21:00 0 MW
01-05-2025 21:00 - 22:00 0 MW
01-05-2025 22:00 - 23:00 0 MW
01-05-2025 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 01-05-2025

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

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 AT-IT border for delivery period 01-05-2025

1. TSO(s)*:
TERNA

2. Identification of affected Long Term Transmission Rights:
AT-IT

3. Triggering event:
Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / hour for each concerned period:
01-05-2025 08:00 - 09:00 71 MW
01-05-2025 09:00 - 10:00 71 MW
01-05-2025 10:00 - 11:00 71 MW
01-05-2025 11:00 - 12:00 71 MW
01-05-2025 12:00 - 13:00 71 MW
01-05-2025 13:00 - 14:00 71 MW
01-05-2025 14:00 - 15:00 71 MW
01-05-2025 15:00 - 16:00 71 MW
01-05-2025 16:00 - 17:00 71 MW

5. Amount of LTTR remaining after curtailment:
01-05-2025 08:00 - 09:00 0 MW
01-05-2025 09:00 - 10:00 0 MW
01-05-2025 10:00 - 11:00 0 MW
01-05-2025 11:00 - 12:00 0 MW
01-05-2025 12:00 - 13:00 0 MW
01-05-2025 13:00 - 14:00 0 MW
01-05-2025 14:00 - 15:00 0 MW
01-05-2025 15:00 - 16:00 0 MW
01-05-2025 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)*?

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

Capacity Curtailment on the SI-IT border for delivery period 01-05-2025

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:
01-05-2025 08:00 - 09:00 38 MW
01-05-2025 09:00 - 10:00 38 MW
01-05-2025 10:00 - 11:00 38 MW
01-05-2025 11:00 - 12:00 38 MW
01-05-2025 12:00 - 13:00 38 MW
01-05-2025 13:00 - 14:00 38 MW
01-05-2025 14:00 - 15:00 38 MW
01-05-2025 15:00 - 16:00 38 MW
01-05-2025 16:00 - 17:00 38 MW

5. Amount of LTTR remaining after curtailment:
01-05-2025 08:00 - 09:00 1 MW
01-05-2025 09:00 - 10:00 1 MW
01-05-2025 10:00 - 11:00 1 MW
01-05-2025 11:00 - 12:00 1 MW
01-05-2025 12:00 - 13:00 1 MW
01-05-2025 13:00 - 14:00 1 MW
01-05-2025 14:00 - 15:00 1 MW
01-05-2025 15:00 - 16:00 1 MW
01-05-2025 16:00 - 17:00 1 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

Capacity Curtailment on the FR-IT border for delivery period 01-05-2025

1. TSO(s)*:
TERNA

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:
01-05-2025 08:00 - 09:00 457 MW
01-05-2025 09:00 - 10:00 457 MW
01-05-2025 10:00 - 11:00 457 MW
01-05-2025 11:00 - 12:00 457 MW
01-05-2025 12:00 - 13:00 457 MW
01-05-2025 13:00 - 14:00 457 MW
01-05-2025 14:00 - 15:00 457 MW
01-05-2025 15:00 - 16:00 457 MW
01-05-2025 16:00 - 17:00 457 MW

5. Amount of LTTR remaining after curtailment:
01-05-2025 08:00 - 09:00 23 MW
01-05-2025 09:00 - 10:00 23 MW
01-05-2025 10:00 - 11:00 23 MW
01-05-2025 11:00 - 12:00 23 MW
01-05-2025 12:00 - 13:00 23 MW
01-05-2025 13:00 - 14:00 23 MW
01-05-2025 14:00 - 15:00 23 MW
01-05-2025 15:00 - 16:00 23 MW
01-05-2025 16:00 - 17:00 23 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

Capacity Curtailment on the CH-IT border for delivery period 01-05-2025

1. TSO(s)*:
SWISSGRID

2. Identification of affected Long Term Transmission Rights:
CH-IT

3. Triggering event:
Curtailment due to Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / hour for each concerned period:
01-05-2025 08:00 - 09:00 285 MW
01-05-2025 09:00 - 10:00 285 MW
01-05-2025 10:00 - 11:00 285 MW
01-05-2025 11:00 - 12:00 285 MW
01-05-2025 12:00 - 13:00 285 MW
01-05-2025 13:00 - 14:00 285 MW
01-05-2025 14:00 - 15:00 285 MW
01-05-2025 15:00 - 16:00 285 MW
01-05-2025 16:00 - 17:00 285 MW

Dear Market Participants,

We would like to inform you that as per TSOs request, the 2025 Auction Calendar has been updated on the corridor IFA1-GB<>FR and IFA2-GB<>FR

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

Best regards,

JAO Operations Team

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:

30-04-2025 00:00 - 01:00 499 MW

30-04-2025 01:00 - 02:00 499 MW

30-04-2025 02:00 - 03:00 499 MW

30-04-2025 03:00 - 04:00 499 MW

30-04-2025 04:00 - 05:00 499 MW

30-04-2025 05:00 - 06:00 499 MW

30-04-2025 06:00 - 07:00 499 MW

30-04-2025 07:00 - 08:00 499 MW

30-04-2025 08:00 - 09:00 499 MW

30-04-2025 09:00 - 10:00 499 MW

30-04-2025 10:00 - 11:00 499 MW

30-04-2025 11:00 - 12:00 499 MW

30-04-2025 12:00 - 13:00 499 MW

30-04-2025 13:00 - 14:00 499 MW

30-04-2025 14:00 - 15:00 499 MW

30-04-2025 15:00 - 16:00 499 MW

5. Amount of LTTR remaining after curtailment:

30-04-2025 00:00 - 01:00 289 MW

30-04-2025 01:00 - 02:00 289 MW

30-04-2025 02:00 - 03:00 294 MW

30-04-2025 03:00 - 04:00 289 MW

30-04-2025 04:00 - 05:00 289 MW

30-04-2025 05:00 - 06:00 289 MW

30-04-2025 06:00 - 07:00 289 MW

30-04-2025 07:00 - 08:00 289 MW

30-04-2025 08:00 - 09:00 289 MW

30-04-2025 09:00 - 10:00 289 MW

30-04-2025 10:00 - 11:00 289 MW

30-04-2025 11:00 - 12:00 289 MW

30-04-2025 12:00 - 13:00 289 MW

30-04-2025 13:00 - 14:00 289 MW

30-04-2025 14:00 - 15:00 289 MW

30-04-2025 15:00 - 16:00 289 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

Capacity Curtailment on the FR-ES border for delivery period 30-04-2025

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:

30-04-2025 00:00 - 01:00 1900 MW

30-04-2025 01:00 - 02:00 1900 MW

30-04-2025 02:00 - 03:00 1900 MW

30-04-2025 03:00 - 04:00 1900 MW

30-04-2025 04:00 - 05:00 1900 MW

30-04-2025 05:00 - 06:00 1900 MW

30-04-2025 06:00 - 07:00 1900 MW

30-04-2025 07:00 - 08:00 1900 MW

30-04-2025 08:00 - 09:00 1900 MW

30-04-2025 09:00 - 10:00 1900 MW

30-04-2025 10:00 - 11:00 1900 MW

30-04-2025 11:00 - 12:00 1900 MW

30-04-2025 12:00 - 13:00 1900 MW

30-04-2025 13:00 - 14:00 1900 MW

30-04-2025 14:00 - 15:00 1900 MW

30-04-2025 15:00 - 16:00 1900 MW

30-04-2025 16:00 - 17:00 1900 MW

30-04-2025 17:00 - 18:00 1900 MW

30-04-2025 18:00 - 19:00 1900 MW

30-04-2025 19:00 - 20:00 1900 MW

30-04-2025 20:00 - 21:00 1900 MW

30-04-2025 21:00 - 22:00 1900 MW

30-04-2025 22:00 - 23:00 1900 MW

30-04-2025 23:00 - 24:00 1900 MW

5. Amount of LTTR remaining after curtailment:

30-04-2025 00:00 - 01:00 1768 MW

30-04-2025 01:00 - 02:00 1768 MW

30-04-2025 02:00 - 03:00 1768 MW

30-04-2025 03:00 - 04:00 1768 MW

30-04-2025 04:00 - 05:00 1768 MW

30-04-2025 05:00 - 06:00 1768 MW

30-04-2025 06:00 - 07:00 1768 MW

30-04-2025 07:00 - 08:00 1768 MW

30-04-2025 08:00 - 09:00 1768 MW

30-04-2025 09:00 - 10:00 1768 MW

30-04-2025 10:00 - 11:00 1768 MW

30-04-2025 11:00 - 12:00 1768 MW

30-04-2025 12:00 - 13:00 1768 MW

30-04-2025 13:00 - 14:00 1768 MW

30-04-2025 14:00 - 15:00 1768 MW

30-04-2025 15:00 - 16:00 1768 MW

30-04-2025 16:00 - 17:00 1768 MW

30-04-2025 17:00 - 18:00 1768 MW

30-04-2025 18:00 - 19:00 1768 MW

30-04-2025 19:00 - 20:00 1768 MW

30-04-2025 20:00 - 21:00 1768 MW

30-04-2025 21:00 - 22:00 1768 MW

30-04-2025 22:00 - 23:00 1768 MW

30-04-2025 23:00 - 24:00 1768 MW

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

30/04/2025

00:00-01:00 argia-arkale 1

01:00-02:00 argia-arkale 1

02:00-03:00 argia-arkale 1

03:00-04:00 argia-arkale 1

04:00-05:00 argia-arkale 1

05:00-06:00 argia-arkale 1

06:00-07:00 argia-arkale 1

07:00-08:00 argia-arkale 1

08:00-09:00 argia-arkale 1

09:00-10:00 argia-arkale 1

10:00-11:00 argia-arkale 1

11:00-12:00 argia-arkale 1

12:00-13:00 argia-arkale 1

13:00-14:00 argia-arkale 1

14:00-15:00 argia-arkale 1

15:00-16:00 argia-arkale 1

16:00-17:00 argia-arkale 1

17:00-18:00 argia-arkale 1

18:00-19:00 argia-arkale 1

19:00-20:00 argia-arkale 1

20:00-21:00 argia-arkale 1

21:00-22:00 argia-arkale 1

22:00-23:00 argia-arkale 1

23:00-24:00 argia-arkale 1

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 ES-FR border for delivery period 30-04-2025

1. TSO(s)*:

RTE, REE

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:

30-04-2025 00:00 - 01:00 1330 MW

30-04-2025 01:00 - 02:00 1330 MW

30-04-2025 02:00 - 03:00 1330 MW

30-04-2025 03:00 - 04:00 1330 MW

30-04-2025 04:00 - 05:00 1330 MW

30-04-2025 05:00 - 06:00 1330 MW

30-04-2025 06:00 - 07:00 1330 MW

30-04-2025 07:00 - 08:00 1330 MW

30-04-2025 08:00 - 09:00 1330 MW

30-04-2025 09:00 - 10:00 1330 MW

30-04-2025 10:00 - 11:00 1330 MW

30-04-2025 11:00 - 12:00 1330 MW

30-04-2025 12:00 - 13:00 1330 MW

30-04-2025 13:00 - 14:00 1330 MW

30-04-2025 14:00 - 15:00 1330 MW

30-04-2025 15:00 - 16:00 1330 MW

30-04-2025 16:00 - 17:00 1330 MW

30-04-2025 17:00 - 18:00 1330 MW

30-04-2025 18:00 - 19:00 1330 MW

30-04-2025 19:00 - 20:00 1330 MW

30-04-2025 20:00 - 21:00 1330 MW

30-04-2025 21:00 - 22:00 1330 MW

30-04-2025 22:00 - 23:00 1330 MW

30-04-2025 23:00 - 24:00 1330 MW

5. Amount of LTTR remaining after curtailment:

30-04-2025 00:00 - 01:00 0 MW

30-04-2025 01:00 - 02:00 0 MW

30-04-2025 02:00 - 03:00 0 MW

30-04-2025 03:00 - 04:00 0 MW

30-04-2025 04:00 - 05:00 0 MW

30-04-2025 05:00 - 06:00 0 MW

30-04-2025 06:00 - 07:00 0 MW

30-04-2025 07:00 - 08:00 0 MW

30-04-2025 08:00 - 09:00 0 MW

30-04-2025 09:00 - 10:00 0 MW

30-04-2025 10:00 - 11:00 0 MW

30-04-2025 11:00 - 12:00 0 MW

30-04-2025 12:00 - 13:00 0 MW

30-04-2025 13:00 - 14:00 0 MW

30-04-2025 14:00 - 15:00 0 MW

30-04-2025 15:00 - 16:00 0 MW

30-04-2025 16:00 - 17:00 0 MW

30-04-2025 17:00 - 18:00 0 MW

30-04-2025 18:00 - 19:00 0 MW

30-04-2025 19:00 - 20:00 0 MW

30-04-2025 20:00 - 21:00 0 MW

30-04-2025 21:00 - 22:00 0 MW

30-04-2025 22:00 - 23:00 0 MW

30-04-2025 23:00 - 24:00 0 MW

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

30/04/2025

00:00-01:00 argia-arkale 1

01:00-02:00 argia-arkale 1

02:00-03:00 argia-arkale 1

03:00-04:00 argia-arkale 1

04:00-05:00 argia-arkale 1

05:00-06:00 argia-arkale 1

06:00-07:00 argia-arkale 1

07:00-08:00 argia-arkale 1

08:00-09:00 argia-arkale 1

09:00-10:00 argia-arkale 1

10:00-11:00 argia-arkale 1

11:00-12:00 argia-arkale 1

12:00-13:00 argia-arkale 1

13:00-14:00 argia-arkale 1

14:00-15:00 argia-arkale 1

15:00-16:00 argia-arkale 1

16:00-17:00 argia-arkale 1

17:00-18:00 argia-arkale 1

18:00-19:00 argia-arkale 1

19:00-20:00 argia-arkale 1

20:00-21:00 argia-arkale 1

21:00-22:00 argia-arkale 1

22:00-23:00 argia-arkale 1

23:00-24:00 argia-arkale 1

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 GR-IT border for delivery period 30-04-2025

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:

30-04-2025 00:00 - 01:00 50 MW

30-04-2025 01:00 - 02:00 50 MW

30-04-2025 02:00 - 03:00 50 MW

30-04-2025 03:00 - 04:00 50 MW

30-04-2025 04:00 - 05:00 50 MW

30-04-2025 05:00 - 06:00 50 MW

30-04-2025 06:00 - 07:00 50 MW

30-04-2025 07:00 - 08:00 50 MW

30-04-2025 08:00 - 09:00 50 MW

30-04-2025 09:00 - 10:00 50 MW

30-04-2025 10:00 - 11:00 50 MW

30-04-2025 11:00 - 12:00 50 MW

30-04-2025 12:00 - 13:00 50 MW

30-04-2025 13:00 - 14:00 50 MW

30-04-2025 14:00 - 15:00 50 MW

30-04-2025 15:00 - 16:00 50 MW

30-04-2025 16:00 - 17:00 50 MW

30-04-2025 17:00 - 18:00 50 MW

30-04-2025 18:00 - 19:00 50 MW

30-04-2025 19:00 - 20:00 50 MW

30-04-2025 20:00 - 21:00 50 MW

30-04-2025 21:00 - 22:00 50 MW

30-04-2025 22:00 - 23:00 50 MW

30-04-2025 23:00 - 24:00 50 MW

5. Amount of LTTR remaining after curtailment:

30-04-2025 00:00 - 01:00 0 MW

30-04-2025 01:00 - 02:00 0 MW

30-04-2025 02:00 - 03:00 0 MW

30-04-2025 03:00 - 04:00 0 MW

30-04-2025 04:00 - 05:00 0 MW

30-04-2025 05:00 - 06:00 0 MW

30-04-2025 06:00 - 07:00 0 MW

30-04-2025 07:00 - 08:00 0 MW

30-04-2025 08:00 - 09:00 0 MW

30-04-2025 09:00 - 10:00 0 MW

30-04-2025 10:00 - 11:00 0 MW

30-04-2025 11:00 - 12:00 0 MW

30-04-2025 12:00 - 13:00 0 MW

30-04-2025 13:00 - 14:00 0 MW

30-04-2025 14:00 - 15:00 0 MW

30-04-2025 15:00 - 16:00 0 MW

30-04-2025 16:00 - 17:00 0 MW

30-04-2025 17:00 - 18:00 0 MW

30-04-2025 18:00 - 19:00 0 MW

30-04-2025 19:00 - 20:00 0 MW

30-04-2025 20:00 - 21:00 0 MW

30-04-2025 21:00 - 22:00 0 MW

30-04-2025 22:00 - 23:00 0 MW

30-04-2025 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

Capacity Curtailment on the IT-GR border for delivery period 30-04-2025

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:

30-04-2025 00:00 - 01:00 50 MW

30-04-2025 01:00 - 02:00 50 MW

30-04-2025 02:00 - 03:00 50 MW

30-04-2025 03:00 - 04:00 50 MW

30-04-2025 04:00 - 05:00 50 MW

30-04-2025 05:00 - 06:00 50 MW

30-04-2025 06:00 - 07:00 50 MW

30-04-2025 07:00 - 08:00 50 MW

30-04-2025 08:00 - 09:00 50 MW

30-04-2025 09:00 - 10:00 50 MW

30-04-2025 10:00 - 11:00 50 MW

30-04-2025 11:00 - 12:00 50 MW

30-04-2025 12:00 - 13:00 50 MW

30-04-2025 13:00 - 14:00 50 MW

30-04-2025 14:00 - 15:00 50 MW

30-04-2025 15:00 - 16:00 50 MW

30-04-2025 16:00 - 17:00 50 MW

30-04-2025 17:00 - 18:00 50 MW

30-04-2025 18:00 - 19:00 50 MW

30-04-2025 19:00 - 20:00 50 MW

30-04-2025 20:00 - 21:00 50 MW

30-04-2025 21:00 - 22:00 50 MW

30-04-2025 22:00 - 23:00 50 MW

30-04-2025 23:00 - 24:00 50 MW

5. Amount of LTTR remaining after curtailment:

30-04-2025 00:00 - 01:00 0 MW

30-04-2025 01:00 - 02:00 0 MW

30-04-2025 02:00 - 03:00 0 MW

30-04-2025 03:00 - 04:00 0 MW

30-04-2025 04:00 - 05:00 0 MW

30-04-2025 05:00 - 06:00 0 MW

30-04-2025 06:00 - 07:00 0 MW

30-04-2025 07:00 - 08:00 0 MW

30-04-2025 08:00 - 09:00 0 MW

30-04-2025 09:00 - 10:00 0 MW

30-04-2025 10:00 - 11:00 0 MW

30-04-2025 11:00 - 12:00 0 MW

30-04-2025 12:00 - 13:00 0 MW

30-04-2025 13:00 - 14:00 0 MW

30-04-2025 14:00 - 15:00 0 MW

30-04-2025 15:00 - 16:00 0 MW

30-04-2025 16:00 - 17:00 0 MW

30-04-2025 17:00 - 18:00 0 MW

30-04-2025 18:00 - 19:00 0 MW

30-04-2025 19:00 - 20:00 0 MW

30-04-2025 20:00 - 21:00 0 MW

30-04-2025 21:00 - 22:00 0 MW

30-04-2025 22:00 - 23:00 0 MW

30-04-2025 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

Capacity Curtailment on the CH-IT border for delivery period 30-04-2025

1. TSO(s)*:

SWISSGRID

2. Identification of affected Long Term Transmission Rights:

CH-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

30-04-2025 09:00 - 10:00 2560 MW

30-04-2025 10:00 - 11:00 2560 MW

30-04-2025 11:00 - 12:00 2560 MW

30-04-2025 12:00 - 13:00 2560 MW

30-04-2025 13:00 - 14:00 2560 MW

30-04-2025 14:00 - 15:00 2560 MW

30-04-2025 15:00 - 16:00 2560 MW

30-04-2025 16:00 - 17:00 2560 MW

30-04-2025 17:00 - 18:00 2560 MW

5. Amount of LTTR remaining after curtailment:

30-04-2025 09:00 - 10:00 2240 MW

30-04-2025 10:00 - 11:00 1914 MW

30-04-2025 11:00 - 12:00 1451 MW

30-04-2025 12:00 - 13:00 1451 MW

30-04-2025 13:00 - 14:00 1451 MW

30-04-2025 14:00 - 15:00 1451 MW

30-04-2025 15:00 - 16:00 1451 MW

30-04-2025 16:00 - 17:00 1686 MW

30-04-2025 17:00 - 18:00 2165 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)*?

Dear Market Participants,

We would like to inform you that missing data for the delivery date of 29/04/2025, for the Core ID CCR IDCC (b) will be published with a delay.

Thank you for your understanding.

Best regards,

JAO Operations Team

Dear Market Participants,

We would like to inform you that as per TSOs request, the 2025 Auction Calendar has been updated on the corridor EL1-GB<>FR.

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

Best regards,

JAO Operations Team

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.

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.

Go to registration