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

1. TSO(s)*:

HTSO-TSO

2. Identification of affected Long Term Transmission Rights:

BG-GR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

21-04-2026 06:00 - 07:00 800 MW

21-04-2026 07:00 - 08:00 800 MW

21-04-2026 08:00 - 09:00 800 MW

21-04-2026 09:00 - 10:00 800 MW

21-04-2026 10:00 - 11:00 800 MW

21-04-2026 11:00 - 12:00 800 MW

21-04-2026 12:00 - 13:00 800 MW

21-04-2026 13:00 - 14:00 800 MW

21-04-2026 14:00 - 15:00 800 MW

5. Amount of LTTR remaining after curtailment:

21-04-2026 06:00 - 07:00 483 MW

21-04-2026 07:00 - 08:00 483 MW

21-04-2026 08:00 - 09:00 483 MW

21-04-2026 09:00 - 10:00 483 MW

21-04-2026 10:00 - 11:00 483 MW

21-04-2026 11:00 - 12:00 483 MW

21-04-2026 12:00 - 13:00 483 MW

21-04-2026 13:00 - 14:00 483 MW

21-04-2026 14:00 - 15:00 483 MW

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

Operational security reasons.

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.

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:

21-04-2026 00:00 - 01:00 500 MW

21-04-2026 01:00 - 02:00 500 MW

21-04-2026 02:00 - 03:00 500 MW

21-04-2026 03:00 - 04:00 500 MW

21-04-2026 04:00 - 05:00 500 MW

21-04-2026 05:00 - 06:00 500 MW

21-04-2026 06:00 - 07:00 500 MW

21-04-2026 07:00 - 08:00 500 MW

21-04-2026 08:00 - 09:00 500 MW

21-04-2026 09:00 - 10:00 500 MW

21-04-2026 10:00 - 11:00 500 MW

21-04-2026 11:00 - 12:00 500 MW

21-04-2026 12:00 - 13:00 500 MW

21-04-2026 13:00 - 14:00 500 MW

21-04-2026 14:00 - 15:00 500 MW

21-04-2026 15:00 - 16:00 500 MW

21-04-2026 16:00 - 17:00 500 MW

21-04-2026 17:00 - 18:00 500 MW

21-04-2026 18:00 - 19:00 500 MW

21-04-2026 19:00 - 20:00 500 MW

21-04-2026 20:00 - 21:00 500 MW

21-04-2026 21:00 - 22:00 500 MW

21-04-2026 22:00 - 23:00 500 MW

21-04-2026 23:00 - 24:00 500 MW

5. Amount of LTTR remaining after curtailment:

21-04-2026 00:00 - 01:00 241 MW

21-04-2026 01:00 - 02:00 241 MW

21-04-2026 02:00 - 03:00 241 MW

21-04-2026 03:00 - 04:00 241 MW

21-04-2026 04:00 - 05:00 241 MW

21-04-2026 05:00 - 06:00 241 MW

21-04-2026 06:00 - 07:00 241 MW

21-04-2026 07:00 - 08:00 241 MW

21-04-2026 08:00 - 09:00 241 MW

21-04-2026 09:00 - 10:00 241 MW

21-04-2026 10:00 - 11:00 241 MW

21-04-2026 11:00 - 12:00 241 MW

21-04-2026 12:00 - 13:00 241 MW

21-04-2026 13:00 - 14:00 241 MW

21-04-2026 14:00 - 15:00 241 MW

21-04-2026 15:00 - 16:00 241 MW

21-04-2026 16:00 - 17:00 241 MW

21-04-2026 17:00 - 18:00 241 MW

21-04-2026 18:00 - 19:00 241 MW

21-04-2026 19:00 - 20:00 241 MW

21-04-2026 20:00 - 21:00 241 MW

21-04-2026 21:00 - 22:00 241 MW

21-04-2026 22:00 - 23:00 241 MW

21-04-2026 23:00 - 24:00 241 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:

IT-GR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

21-04-2026 00:00 - 01:00 500 MW

21-04-2026 01:00 - 02:00 500 MW

21-04-2026 02:00 - 03:00 500 MW

21-04-2026 03:00 - 04:00 500 MW

21-04-2026 04:00 - 05:00 500 MW

21-04-2026 05:00 - 06:00 500 MW

21-04-2026 06:00 - 07:00 500 MW

21-04-2026 07:00 - 08:00 500 MW

21-04-2026 08:00 - 09:00 500 MW

21-04-2026 09:00 - 10:00 500 MW

21-04-2026 10:00 - 11:00 500 MW

21-04-2026 11:00 - 12:00 500 MW

21-04-2026 12:00 - 13:00 500 MW

21-04-2026 13:00 - 14:00 500 MW

21-04-2026 14:00 - 15:00 500 MW

21-04-2026 15:00 - 16:00 500 MW

21-04-2026 16:00 - 17:00 500 MW

21-04-2026 17:00 - 18:00 500 MW

21-04-2026 18:00 - 19:00 500 MW

21-04-2026 19:00 - 20:00 500 MW

21-04-2026 20:00 - 21:00 500 MW

21-04-2026 21:00 - 22:00 500 MW

21-04-2026 22:00 - 23:00 500 MW

21-04-2026 23:00 - 24:00 500 MW

5. Amount of LTTR remaining after curtailment:

21-04-2026 00:00 - 01:00 243 MW

21-04-2026 01:00 - 02:00 243 MW

21-04-2026 02:00 - 03:00 243 MW

21-04-2026 03:00 - 04:00 243 MW

21-04-2026 04:00 - 05:00 243 MW

21-04-2026 05:00 - 06:00 243 MW

21-04-2026 06:00 - 07:00 243 MW

21-04-2026 07:00 - 08:00 243 MW

21-04-2026 08:00 - 09:00 243 MW

21-04-2026 09:00 - 10:00 243 MW

21-04-2026 10:00 - 11:00 243 MW

21-04-2026 11:00 - 12:00 243 MW

21-04-2026 12:00 - 13:00 243 MW

21-04-2026 13:00 - 14:00 243 MW

21-04-2026 14:00 - 15:00 243 MW

21-04-2026 15:00 - 16:00 243 MW

21-04-2026 16:00 - 17:00 243 MW

21-04-2026 17:00 - 18:00 243 MW

21-04-2026 18:00 - 19:00 243 MW

21-04-2026 19:00 - 20:00 243 MW

21-04-2026 20:00 - 21:00 243 MW

21-04-2026 21:00 - 22:00 243 MW

21-04-2026 22:00 - 23:00 243 MW

21-04-2026 23:00 - 24:00 243 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)*:

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:

21-04-2026 00:00 - 01:00 150 MW

21-04-2026 01:00 - 02:00 150 MW

21-04-2026 02:00 - 03:00 150 MW

21-04-2026 03:00 - 04:00 150 MW

21-04-2026 04:00 - 05:00 150 MW

21-04-2026 05:00 - 06:00 150 MW

21-04-2026 06:00 - 07:00 150 MW

21-04-2026 07:00 - 08:00 150 MW

21-04-2026 08:00 - 09:00 150 MW

21-04-2026 09:00 - 10:00 150 MW

21-04-2026 10:00 - 11:00 150 MW

21-04-2026 11:00 - 12:00 150 MW

21-04-2026 12:00 - 13:00 150 MW

21-04-2026 13:00 - 14:00 150 MW

21-04-2026 14:00 - 15:00 150 MW

21-04-2026 15:00 - 16:00 150 MW

21-04-2026 16:00 - 17:00 150 MW

21-04-2026 17:00 - 18:00 150 MW

21-04-2026 18:00 - 19:00 150 MW

21-04-2026 19:00 - 20:00 150 MW

21-04-2026 20:00 - 21:00 150 MW

21-04-2026 21:00 - 22:00 150 MW

21-04-2026 22:00 - 23:00 150 MW

21-04-2026 23:00 - 24:00 150 MW

5. Amount of LTTR remaining after curtailment:

21-04-2026 00:00 - 01:00 0 MW

21-04-2026 01:00 - 02:00 0 MW

21-04-2026 02:00 - 03:00 0 MW

21-04-2026 03:00 - 04:00 0 MW

21-04-2026 04:00 - 05:00 0 MW

21-04-2026 05:00 - 06:00 0 MW

21-04-2026 06:00 - 07:00 0 MW

21-04-2026 07:00 - 08:00 0 MW

21-04-2026 08:00 - 09:00 0 MW

21-04-2026 09:00 - 10:00 0 MW

21-04-2026 10:00 - 11:00 0 MW

21-04-2026 11:00 - 12:00 0 MW

21-04-2026 12:00 - 13:00 0 MW

21-04-2026 13:00 - 14:00 0 MW

21-04-2026 14:00 - 15:00 0 MW

21-04-2026 15:00 - 16:00 0 MW

21-04-2026 16:00 - 17:00 0 MW

21-04-2026 17:00 - 18:00 0 MW

21-04-2026 18:00 - 19:00 0 MW

21-04-2026 19:00 - 20:00 0 MW

21-04-2026 20:00 - 21:00 0 MW

21-04-2026 21:00 - 22:00 0 MW

21-04-2026 22:00 - 23:00 0 MW

21-04-2026 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*:

21/04/2026

      00:00-01:00 FLEAC - BRIOUX

      01:00-02:00 FLEAC - BRIOUX

      02:00-03:00 FLEAC - BRIOUX

      03:00-04:00 FLEAC - BRIOUX

      04:00-05:00 FLEAC - BRIOUX

      05:00-06:00 FLEAC - BRIOUX

      06:00-07:00 FLEAC - BRIOUX

      07:00-08:00 FLEAC - BRIOUX

      08:00-09:00 FLEAC - BRIOUX

      09:00-10:00 FLEAC - BRIOUX

      10:00-11:00 FLEAC - BRIOUX

      11:00-12:00 FLEAC - BRIOUX

      12:00-13:00 FLEAC - BRIOUX

      13:00-14:00 FLEAC - BRIOUX

      14:00-15:00 FLEAC - BRIOUX

      15:00-16:00 FLEAC - BRIOUX

      16:00-17:00 FLEAC - BRIOUX

      17:00-18:00 FLEAC - BRIOUX

      18:00-19:00 FLEAC - BRIOUX

      19:00-20:00 FLEAC - BRIOUX

      20:00-21:00 FLEAC - BRIOUX

      21:00-22:00 FLEAC - BRIOUX

      22:00-23:00 FLEAC - BRIOUX

      23:00-24:00 FLEAC - BRIOUX

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

1. TSO(s)*:

IPTO (ADMIE)  &  ESO 

2. Identification of affected Long Term Transmission Rights:

BG-GR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

20-04-2026 06:00 - 07:00 800 MW

20-04-2026 07:00 - 08:00 800 MW

20-04-2026 08:00 - 09:00 800 MW

20-04-2026 09:00 - 10:00 800 MW

20-04-2026 10:00 - 11:00 800 MW

20-04-2026 11:00 - 12:00 800 MW

20-04-2026 12:00 - 13:00 800 MW

20-04-2026 13:00 - 14:00 800 MW

20-04-2026 14:00 - 15:00 800 MW

5. Amount of LTTR remaining after curtailment:

20-04-2026 06:00 - 07:00 483 MW

20-04-2026 07:00 - 08:00 483 MW

20-04-2026 08:00 - 09:00 483 MW

20-04-2026 09:00 - 10:00 483 MW

20-04-2026 10:00 - 11:00 483 MW

20-04-2026 11:00 - 12:00 483 MW

20-04-2026 12:00 - 13:00 483 MW

20-04-2026 13:00 - 14:00 483 MW

20-04-2026 14:00 - 15:00 483 MW

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

Operational security reasons. 

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.

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:

20-04-2026 00:00 - 01:00 500 MW

20-04-2026 01:00 - 02:00 500 MW

20-04-2026 02:00 - 03:00 500 MW

20-04-2026 03:00 - 04:00 500 MW

20-04-2026 04:00 - 05:00 500 MW

20-04-2026 05:00 - 06:00 500 MW

20-04-2026 06:00 - 07:00 500 MW

20-04-2026 07:00 - 08:00 500 MW

20-04-2026 08:00 - 09:00 500 MW

20-04-2026 09:00 - 10:00 500 MW

20-04-2026 10:00 - 11:00 500 MW

20-04-2026 11:00 - 12:00 500 MW

20-04-2026 12:00 - 13:00 500 MW

20-04-2026 13:00 - 14:00 500 MW

20-04-2026 14:00 - 15:00 500 MW

20-04-2026 15:00 - 16:00 500 MW

20-04-2026 16:00 - 17:00 500 MW

20-04-2026 17:00 - 18:00 500 MW

20-04-2026 18:00 - 19:00 500 MW

20-04-2026 19:00 - 20:00 500 MW

20-04-2026 20:00 - 21:00 500 MW

20-04-2026 21:00 - 22:00 500 MW

20-04-2026 22:00 - 23:00 500 MW

20-04-2026 23:00 - 24:00 500 MW

5. Amount of LTTR remaining after curtailment:

20-04-2026 00:00 - 01:00 241 MW

20-04-2026 01:00 - 02:00 241 MW

20-04-2026 02:00 - 03:00 241 MW

20-04-2026 03:00 - 04:00 241 MW

20-04-2026 04:00 - 05:00 241 MW

20-04-2026 05:00 - 06:00 241 MW

20-04-2026 06:00 - 07:00 241 MW

20-04-2026 07:00 - 08:00 241 MW

20-04-2026 08:00 - 09:00 241 MW

20-04-2026 09:00 - 10:00 241 MW

20-04-2026 10:00 - 11:00 241 MW

20-04-2026 11:00 - 12:00 0 MW

20-04-2026 12:00 - 13:00 0 MW

20-04-2026 13:00 - 14:00 0 MW

20-04-2026 14:00 - 15:00 0 MW

20-04-2026 15:00 - 16:00 241 MW

20-04-2026 16:00 - 17:00 241 MW

20-04-2026 17:00 - 18:00 241 MW

20-04-2026 18:00 - 19:00 241 MW

20-04-2026 19:00 - 20:00 241 MW

20-04-2026 20:00 - 21:00 241 MW

20-04-2026 21:00 - 22:00 241 MW

20-04-2026 22:00 - 23:00 241 MW

20-04-2026 23:00 - 24:00 241 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, 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:

20-04-2026 00:00 - 01:00 500 MW

20-04-2026 01:00 - 02:00 500 MW

20-04-2026 02:00 - 03:00 500 MW

20-04-2026 03:00 - 04:00 500 MW

20-04-2026 04:00 - 05:00 500 MW

20-04-2026 05:00 - 06:00 500 MW

20-04-2026 06:00 - 07:00 500 MW

20-04-2026 07:00 - 08:00 500 MW

20-04-2026 08:00 - 09:00 500 MW

20-04-2026 09:00 - 10:00 500 MW

20-04-2026 10:00 - 11:00 500 MW

20-04-2026 11:00 - 12:00 500 MW

20-04-2026 12:00 - 13:00 500 MW

20-04-2026 13:00 - 14:00 500 MW

20-04-2026 14:00 - 15:00 500 MW

20-04-2026 15:00 - 16:00 500 MW

20-04-2026 16:00 - 17:00 500 MW

20-04-2026 17:00 - 18:00 500 MW

20-04-2026 18:00 - 19:00 500 MW

20-04-2026 19:00 - 20:00 500 MW

20-04-2026 20:00 - 21:00 500 MW

20-04-2026 21:00 - 22:00 500 MW

20-04-2026 22:00 - 23:00 500 MW

20-04-2026 23:00 - 24:00 500 MW

5. Amount of LTTR remaining after curtailment:

20-04-2026 00:00 - 01:00 243 MW

20-04-2026 01:00 - 02:00 243 MW

20-04-2026 02:00 - 03:00 243 MW

20-04-2026 03:00 - 04:00 243 MW

20-04-2026 04:00 - 05:00 243 MW

20-04-2026 05:00 - 06:00 243 MW

20-04-2026 06:00 - 07:00 243 MW

20-04-2026 07:00 - 08:00 243 MW

20-04-2026 08:00 - 09:00 243 MW

20-04-2026 09:00 - 10:00 243 MW

20-04-2026 10:00 - 11:00 243 MW

20-04-2026 11:00 - 12:00 243 MW

20-04-2026 12:00 - 13:00 243 MW

20-04-2026 13:00 - 14:00 243 MW

20-04-2026 14:00 - 15:00 243 MW

20-04-2026 15:00 - 16:00 243 MW

20-04-2026 16:00 - 17:00 243 MW

20-04-2026 17:00 - 18:00 243 MW

20-04-2026 18:00 - 19:00 243 MW

20-04-2026 19:00 - 20:00 243 MW

20-04-2026 20:00 - 21:00 243 MW

20-04-2026 21:00 - 22:00 243 MW

20-04-2026 22:00 - 23:00 243 MW

20-04-2026 23:00 - 24:00 243 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