Cover of Annual report 2024
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
OPS
  • 500+
    Registered market participants
  • 26k+
    Auctions held annually
  • 100%
    Auction tool availability
  • 80+
    Employees
  • 50
    TSOs serviced

Latest market messages

Go to Message Board
Go to Message board

Capacity Curtailment on the EE-LV border for delivery period 27-04-2026

by JAO

1. TSO(s)*:

AST

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:

27-04-2026 00:00 - 01:00 450 MW

27-04-2026 05:00 - 06:00 450 MW

27-04-2026 08:00 - 09:00 450 MW

27-04-2026 11:00 - 12:00 450 MW

27-04-2026 12:00 - 13:00 450 MW

27-04-2026 13:00 - 14:00 450 MW

27-04-2026 14:00 - 15:00 450 MW

27-04-2026 16:00 - 17:00 450 MW

27-04-2026 19:00 - 20:00 450 MW

27-04-2026 21:00 - 22:00 450 MW

27-04-2026 22:00 - 23:00 450 MW

27-04-2026 23:00 - 24:00 450 MW

5. Amount of LTTR remaining after curtailment:

27-04-2026 00:00 - 01:00 387 MW

27-04-2026 05:00 - 06:00 380 MW

27-04-2026 08:00 - 09:00 391 MW

27-04-2026 11:00 - 12:00 401 MW

27-04-2026 12:00 - 13:00 399 MW

27-04-2026 13:00 - 14:00 387 MW

27-04-2026 14:00 - 15:00 391 MW

27-04-2026 16:00 - 17:00 387 MW

27-04-2026 19:00 - 20:00 392 MW

27-04-2026 21:00 - 22:00 400 MW

27-04-2026 22:00 - 23:00 401 MW

27-04-2026 23:00 - 24:00 410 MW

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

Nord Pool - UMM Platform as well as the capacity already allocated on The Baltic balancing Market for balancing capacity sharing at Transparency Platform

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

There are no alternatives 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 SI-AT border for delivery period 27-04-2026

by JAO

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

SI-AT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

27-04-2026 08:00 - 09:00 370 MW

27-04-2026 09:00 - 10:00 370 MW

27-04-2026 10:00 - 11:00 370 MW

27-04-2026 11:00 - 12:00 370 MW

27-04-2026 15:00 - 16:00 370 MW

27-04-2026 16:00 - 17:00 370 MW

27-04-2026 17:00 - 18:00 370 MW

5. Amount of LTTR remaining after curtailment:

27-04-2026 08:00 - 09:00 190 MW

27-04-2026 09:00 - 10:00 159 MW

27-04-2026 10:00 - 11:00 140 MW

27-04-2026 11:00 - 12:00 201 MW

27-04-2026 15:00 - 16:00 154 MW

27-04-2026 16:00 - 17:00 196 MW

27-04-2026 17:00 - 18:00 226 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 HU-AT border for delivery period 27-04-2026

by JAO

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

HU-AT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

27-04-2026 08:00 - 09:00 48 MW

27-04-2026 09:00 - 10:00 48 MW

27-04-2026 10:00 - 11:00 48 MW

27-04-2026 15:00 - 16:00 48 MW

27-04-2026 16:00 - 17:00 48 MW

5. Amount of LTTR remaining after curtailment:

27-04-2026 08:00 - 09:00 34 MW

27-04-2026 09:00 - 10:00 30 MW

27-04-2026 10:00 - 11:00 24 MW

27-04-2026 15:00 - 16:00 30 MW

27-04-2026 16:00 - 17:00 34 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 AT-CZ border for delivery period 27-04-2026

by JAO

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

AT-CZ

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

27-04-2026 08:00 - 09:00 350 MW

27-04-2026 09:00 - 10:00 350 MW

27-04-2026 10:00 - 11:00 350 MW

27-04-2026 11:00 - 12:00 350 MW

27-04-2026 15:00 - 16:00 350 MW

27-04-2026 16:00 - 17:00 350 MW

27-04-2026 17:00 - 18:00 350 MW

5. Amount of LTTR remaining after curtailment:

27-04-2026 08:00 - 09:00 112 MW

27-04-2026 09:00 - 10:00 64 MW

27-04-2026 10:00 - 11:00 79 MW

27-04-2026 11:00 - 12:00 205 MW

27-04-2026 15:00 - 16:00 170 MW

27-04-2026 16:00 - 17:00 189 MW

27-04-2026 17:00 - 18:00 180 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 AT-DE border for delivery period 27-04-2026

by JAO

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

AT-DE

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

27-04-2026 08:00 - 09:00 3620 MW

27-04-2026 09:00 - 10:00 3620 MW

27-04-2026 10:00 - 11:00 3620 MW

27-04-2026 11:00 - 12:00 3620 MW

27-04-2026 15:00 - 16:00 3620 MW

27-04-2026 16:00 - 17:00 3620 MW

27-04-2026 17:00 - 18:00 3620 MW

5. Amount of LTTR remaining after curtailment:

27-04-2026 08:00 - 09:00 1364 MW

27-04-2026 09:00 - 10:00 853 MW

27-04-2026 10:00 - 11:00 1008 MW

27-04-2026 11:00 - 12:00 2609 MW

27-04-2026 15:00 - 16:00 1965 MW

27-04-2026 16:00 - 17:00 2006 MW

27-04-2026 17:00 - 18:00 2016 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 ME-IT border for delivery period 27-04-2026

by JAO

1. TSO(s)*:

CGES

2. Identification of affected Long Term Transmission Rights:

ME-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

27-04-2026 09:00 - 10:00 400 MW

27-04-2026 10:00 - 11:00 400 MW

27-04-2026 11:00 - 12:00 400 MW

27-04-2026 12:00 - 13:00 400 MW

27-04-2026 13:00 - 14:00 400 MW

27-04-2026 14:00 - 15:00 400 MW

27-04-2026 15:00 - 16:00 400 MW

27-04-2026 16:00 - 17:00 400 MW

27-04-2026 17:00 - 18:00 400 MW

5. Amount of LTTR remaining after curtailment:

27-04-2026 09:00 - 10:00 0 MW

27-04-2026 10:00 - 11:00 0 MW

27-04-2026 11:00 - 12:00 0 MW

27-04-2026 12:00 - 13:00 0 MW

27-04-2026 13:00 - 14:00 0 MW

27-04-2026 14:00 - 15:00 0 MW

27-04-2026 15:00 - 16:00 0 MW

27-04-2026 16:00 - 17:00 0 MW

27-04-2026 17:00 - 18:00 0 MW

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

HVDC Monita

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

*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 26-04-2026

by JAO

1. TSO(s)*:

AST

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:

26-04-2026 11:00 - 12:00 450 MW

26-04-2026 12:00 - 13:00 450 MW

26-04-2026 13:00 - 14:00 450 MW

26-04-2026 14:00 - 15:00 450 MW

26-04-2026 15:00 - 16:00 450 MW

26-04-2026 16:00 - 17:00 450 MW

26-04-2026 17:00 - 18:00 450 MW

26-04-2026 18:00 - 19:00 450 MW

26-04-2026 19:00 - 20:00 450 MW

26-04-2026 20:00 - 21:00 450 MW

5. Amount of LTTR remaining after curtailment:

26-04-2026 11:00 - 12:00 403 MW

26-04-2026 12:00 - 13:00 387 MW

26-04-2026 13:00 - 14:00 380 MW

26-04-2026 14:00 - 15:00 380 MW

26-04-2026 15:00 - 16:00 380 MW

26-04-2026 16:00 - 17:00 380 MW

26-04-2026 17:00 - 18:00 380 MW

26-04-2026 18:00 - 19:00 380 MW

26-04-2026 19:00 - 20:00 380 MW

26-04-2026 20:00 - 21:00 380 MW

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

Nord Pool - UMM Platform as well as the capacity already allocated on The Baltic balancing Market for balancing capacity sharing at Transparency Platform

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

There are no alternatives 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

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. 

ISO
IT

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
JAO workers

Frequently asked questions

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

Go to FAQ

Do you need support?

If you can't find an answer to your question, our team is here to help!

Go to service desk