Transmission System Operators in Baltic namely Litgrid AB, AS Augstsprieguma Tīkls and Elering AS (hereinafter refer to as Baltic TSOs) plan to establish Baltic LFC block following Baltic power system synchronization with Continental Europe synchronous area. Further information on the Baltic LFC concept is provided in the Baltic LFC concept document.

In order to maintain safe and effective operation within the Baltic LFC block, frequency restoration reserves (FRR) will be dimensioned and ensured in accordance with the principles provided in the Baltic LFC block concept, taking into account historic imbalances, outage rates of HVDC and large power plants.

To ensure transparency the Baltic TSOs have developed frequency restoration reserve (hereinafter referred to as FRR) capacity dimensioning methodology and principles for coordinated actions within LFC block to reduce frequency restoration control error (FRCE).

Hereby, before submitting these documents to regulative authorities Baltic TSOs are organizing public consultation.

Please provide your answers to the questions (preferably in English) until 31.03.2023 by email to [email protected] .

Should you have any questions please contact AS Augstsprieguma Tīkls representative listed above.

• Baltic LFC block FRR dimensioning methodology
• Baltic LFC block FRR dimensioning explanatory note
• Baltic LFC block Coordinated actions to reduce FRCE
• Questionnaire for public consultation