The Balancing Energy Market includes the mFRR Process and the aFRR Process. mFRR Process means those processes that are carried out locally by the HETS Operator to activate mFRR Balancing Energy Offers. aFRR Process means those processes that are carried out within the framework of the European aFRR Platform and in the framework of the Automatic Regulation of Production by the HETS Operator to activate aFRR Balancing Energy Offers.

In the Balancing Energy Market, the following products are used:

a) The upward and downward Balancing Energy (mFRR) activated through the mFRR Process for each mFRR Unit of Time.

b) The upward and downward Balancing Energy (aFRR) activated through the aFRR Process for each aFRR Process execution cycle.

The Balancing Service Providers submit Balancing Energy Offers (mFRR and aFRR) by Bidding Zone, that is, Balancing Energy Offers corresponding to activation of mFRR and aFRR. Balancing Energy Offers (aFRR) are converted into aFRR Standard Products by the HETS Operator.

The HETS Operator participates in the European Automatic Frequency Restoration Reserve (aFRR) Platform for the exchange of Balancing Energy from aFRR Standard Products. Balancing Energy exchange means activation of aFRR Balancing Energy Offers for the supply of Balancing Energy from Balancing Service Providers in a scheduling area other than the scheduling area of the HETS Operator.

The European aFRR Platform operates using a Balancing Energy exchange model that incorporates a Common Merit Order List (CMOL). The Common Merit Order List refers to the common list of all aFRR Balancing Energy Offers from the aFRR Standard Products of all the TSOs participating in the European aFRR Platform, ranked according to their offer prices, which is used for the purpose of activating those offers.

The mFRR Process is carried out periodically. The mFRR Process execution cycle takes place during an mFRR Time Unit, which is a period of 15 minutes, commencing as of 01:00 EET on the Dispatch Day. mFRR Time Units are sequential and do not overlap.

The aFRR Process is carried out periodically. The execution cycle of the European aFRR Platform is referred to as the aFRR optimisation cycle. The Automatic Generation Control execution cycle is referred to as the AGC cycle.

The mFRR Process adopts, without modification or review, the binding results of the ISP for each Balancing Service Entity unless the Entity in question is subject to a forced interruption arising from submission of a Partial or Total Non-Availability Declaration, or a Major Outage Declaration. In that case, the Balancing Service Entity shall be considered unavailable and the ISP may be executed again.

The Balancing Capacity for FCR, automatic FRR, and manual FRR, determined in the ISP, as per Article 13.2 of this Rulebook, shall remain in effect during all Dispatch Periods of the Dispatch Day. In case that a Balancing Service Entity is not available due to a failure, the ISP may be executed again in order to award a Balancing Capacity for the FCR, automatic FRR and manual FRR that are actually available.