The congestion management on the interconnections and the assignment of their capacity, is governed by the principles enshrined in Regulation (EC) 714/2009.
The Greek TSO assigns to the interested parties the ability to transfer electricity through interconnections for up to one (1) year. Capacity allocation in the interconnections, which is completed up to previous day of the Allocation Day, is conducted through visible capacity tenders (“explicit auctions”) on an annual, weekly and daily basis.
By the 1st of November each year, the Greek TSO submits to RAE a draft of terms and rules governing the auctions that are conducted for the allocation of capacity in the interconnections for the following calendar year. These terms and conditions are approved by RAE.
The available transmission capacity at interconnections, which is alloacted through the above auctions on a long-term basis, i.e. from one (1) month to one (1) year before the delivery day, is determined by a RAE decision upon a proposal of the Greek TSO. By that decision, RAE may determine the maximum allowed percentage of commitment of the transfer capacity available in the auction by any participant.
The Greek TSO manages the congestion income as provided by Regulation 714/2009 (Article 16 of the Regulation and Article 6 of the Annex to Regulation 714/2009):
• To ensure the availability of distributed capacity or/and
• To maintain or increase interconnection capacity through network investments, in particular with new interconnection lines.
If this revenues cannot be used for the above purposes, it can be used up to a maximum amount determined by a RAE decision, to reduce the network tariffs.
The Greek Transmission System includes interconnections with Albania (AL), North Macedonia (NMK), Bulgaria (BG), Turkey (TR) and Italy (IT).
According to Regulation (EC) No 943/2019 of the European Parliament and of the Council of 5th June 2019 on the internal market for electricity, and in particular article 19 of the Regulation, the Greek Regulatory Authority for Energy (RAE) shall publish an annual report presenting the amount and the use of the congestion revenues collected in the previous year.