The HETS Operator shall draw up the results of a specific 15-minute solution of the Balancing Energy Market taking into consideration the following input data:

a) the Market Schedule for each Balancing Service Entity as recorded by the Use Declaration Submission System of the HETS Operator,

b) the operation schedules of the Dispatchable Generating Units / Dispatchable and non-Dispatchable RES Units Portfolios in Testing Operation, submitted by the respective Producers, through the operation schedule Declarations for units in testing operation,

c) the operation schedules of the generating units/ non-Dispatchable RES Units Portfolios in Commissioning Operation, submitted by the respective Producers, through the Operation Schedule Declarations for units in Commissioning Operation,

d) the mandatory generation schedules for Dispatchable hydro Generating Units, as submitted by the respective Producers through the daily mandatory hydro injection declarations,

e) the Imbalances in the import/export schedules at the interconnections used for the ISP execution, along with actual tripping on interconnections, if any,

f) the already established flows in the inter-zonal corridors between the Bidding Zones deriving from the Market Schedule of all Entities, in order to calculate the residual flows available in the inter-zonal corridors for the solution of the Balancing Energy Market,

g) the information on Balancing Service Entities received by the Energy Management System (e.g. unit in or out of operation, SCADA measurements of the production of Dispatchable Generating Units),

h) the Automatic Generation Control (AGC) status of Balancing Service Entities providing aFRR, which is received by the HETS Operator Energy Management System,

i) the awarded Balancing Capacity of the Balancing Service Entities for upward and downward FCR, aFRR, and mFRR, as received after execution of the latest ISP,

j) the mFRR Energy Offers, in accordance with Article 15.1,

k) the Available Capacity of all Balancing Service Entities, based on the most recently submitted non-Availability Declarations,

l) the latest updated operation schedule of the Balancing Service Entities that have activated a constraint in the maximum quantity of daily energy injection by their Techno-Economic Declaration,

m) the Declared Characteristics of the Balancing Service Entities,

n) the initial level of production/consumption of the Balancing Service Entities before and as close as possible to the start of the mFRR Time Unit of the specific mFRR Process resolution,

o) the zonal Load Imbalances,

p) the zonal RES Units Imbalances.

1. The mFRR Process is executed as a mixed integer linear programming model for each mFRR Time Period.

2. The objective function for resolution of mFRR minimises the cost of covering zonal imbalances for all Bidding Zones using upward and downward mFRR Energy Offers submitted by Balancing Service Entities. The cost of covering HETS zonal imbalances arises from the mFRR Energy Offers that are accepted.

3. The constraints on mFRR problem resolution shall include at least:

   a) the zonal Imbalance constraint for each Bidding Zone,

   b) the constraints on electricity flows between the Bidding Zones,

   c) the technical constraints of the Balancing Service Entities,

   d) the constraints ensuring that the overall HETS requirements for ISP Balancing Capacity and aFRR are maintained,

   e) any restrictions on mandatory injections, and

   f) any constraints on maximum daily electricity injection from Dispatchable Generating Units.

4. In the event that the offer prices of two or more Balancing Energy Offers pertaining to the same mFRR Time Unit are identical, and, at the same time, the respective Balancing Energy quantities of the above offers are not included in their entirety in the mFRR Process results resolution, the offer segments shall be selected in the following order of priority: (a) Dispatchable RES Units Portfolio, (b) Dispatchable hydro Generating Units, (c) Dispatchable Load Portfolio, and (d) Dispatchable thermal Generating Units. Among bidding segments that belong to the same category, priority shall be given to the segments of the offers corresponding to the Balancing Service Entity with the highest Ramp Up Rate. For bidding segments that come into the same category and have the same Ramp Up Rate there will be random selection.

5. In the event that no feasible result is produced for a mFRR Time Unit under the mFRR Process resolution, that is, covering the short-term forecasted imbalances by observing the constraints in paragraph 3 of this Article is unfeasible, the HETS Operator shall repeat the mFRR Process having indicatively undertaken to:

   a) include Balancing Energy Offers from Contracted Generating Units;

   b) relax the constraints indicated in paragraph 3 (4) of this Article in order to reach a feasible solution.

   If, after following the above steps, there is still no feasible solution, the manual FRR process shall be performed once again in accordance with the provisions on Emergency Situations, as defined in the HETS Grid Code.

6. When resolving the manual FRR Process, mFRR Balancing Energy Offers that may have been submitted by Dispatchable Intermittent RES Units Portfolios or Dispatchable Load Portfolios are not taken into account if they are supplying aFRR during the specific manual FRR Time Unit.

7. When resolving the mFRR Process, optimisation may be executed for three consecutive 15-minute periods, so that the impact of HETS conditions during the subsequent mFRR Time Units are effectively taken into account for each mFRR Time Unit. In this case, only the results of the first mFRR Time Unit shall be binding. Results related to subsequent mFRR Time Units shall be indicative.

1. Immediate activation of mFRR means activation of mFRR Balancing Energy at a time that does not coincide with the scheduled periodic performances of the mFRR Process in 15-minute cycles.

2. The HETS Operator is entitled to proceed with an immediate activation of mFRR Balancing Energy and to send Dispatch Instructions to Balancing Service Entities in order to balance the HETS or to address technical constraints at any point in time between the scheduled resolutions of mFRR Processes.

3. To this end, the HETS Operator may, for example, execute the mFRR Process within the 15-minute cycle and/or use two merit order lists already created based on the submitted Balancing Energy Bid prices, one for the upward direction and one for the downward direction.

4. When two merit order lists are used in accordance with the provisions of paragraph 3 of this Article, the volume of mFRR Balancing Energy that can be supplied by each Balancing Service Entity shall be calculated on the basis of the volume of its Balancing Energy Offers and its technical characteristics. The HETS Operator is entitled to select and activate the mFRR Balancing Energy sequentially in accordance with the respective merit order list for the corresponding direction (upward or downward).

5. Balancing Energy Offers that are related to immediate activation of mFRR are taken into account when calculating the mFRR Energy Price for the specific mFRR Time Unit within the framework of Balancing Market Settlement.

6. In the event that the HETS Operator issues Dispatch Instructions that differ from the result of the mFRR resolution, the HETS Operator shall submit a report to the RAEWW justifying the choice of Balancing Service Entities selected to cover the imbalance in the HETS. The report shall be submitted for each month, within one (1) month from the end of the month to which it refers.

1. The results of executing the mFRR Process include the activation volumes of the upward and downward Balancing Energy Offers from the Balancing Energy Entities that are used to issue Dispatch Instructions to the Balancing Service Entities, in order to achieve balance in the Hellenic Electricity Transmission System. No Dispatch Instructions shall be issued if the volume of upward or downward Balancing Energy Offer activated by the manual FRR Process falls below a specific a limit. This limit is calculated as ¼ of 2% of the Maximum Net Capacity for Dispatchable Generating Units and as ¼ of 2% of the dispatchable capacity for Dispatchable Load Portfolios or Dispatchable RES Units Portfolios. These quantities which are calculated as 2% of the Maximum Net Capacity for Dispatchable Generating Units and as 2% of the dispatchable capacity for Dispatchable Load Portfolios or Dispatchable RES Units Portfolios, shall be rounded to a whole number. The above limit is assigned values from 0.25MWh to 1MWh. In cases where this limit is calculated to be less than 0.25MWh, it is assigned the value 0.25MW and in cases where it is calculated to be greater than 1MWh it is assigned the value 1MWh.

2. The HETS Operator shall issue Dispatch Instructions to the Balancing Service Entities for each mFRR Time Unit, in accordance with the results of the mFRR Process.

3. Each subsequent Dispatch Instruction shall replace each preceding one, as far as the same mFRR Time Unit is concerned.

4. In emergency situations, the HETS Operator may issue Dispatch Instructions to a Dispatchable Generating Unit (with the agreement of the Balancing Service Provider) in order to operate at a capacity greater than the Maximum Net Capacity, as specified in its Registered Characteristics. In that case, there shall be no additional fee for the Dispatchable Generating Unit.

5. In the event that the HETS Operator issues Dispatch Instructions that differ from the result of the mFRR resolution, the HETS Operator shall submit a report to the RAEWW justifying the choice of Balancing Service Entities selected to cover the imbalance in the HETS. The report shall be submitted for each month, within one (1) month from the end
   of the month to which it refers.

6. The Balancing Service Entities that are selected to provide Balancing Energy shall have the obligation to follow the Dispatch Instructions issued by the HETS Operator that concern the chosen quantities and the time period.

7. The HETS Operator may issue Dispatch Instructions to activate mFRR Balancing Energy Offers for non-balancing purposes, and Test mFRR Dispatch Instructions.

1. The HETS Operator shall issue Dispatch Instructions which shall determine the generation/offtake level of the Balancing Service Entities.

2. Dispatch Instruction shall be notified by the HETS Operator to the Balancing Service Entity before or at the start of each mFRR Time Unit, except in the case of immediate activation of mFRR.

3. The Dispatch Instruction expires at the end of the mFRR Time Unit to which the Dispatch Instruction was issued, unless a new Dispatch Instruction has been issued in the meantime.

4. The execution by the Balancing Service Provider of the Dispatch Instruction relating to the Balancing Energy through immediate activation of mFRR begins directly after the respective Dispatch Instruction has been transmitted, and ceases at the end of the mFRR Time Unit in which the Dispatch Instruction was issued.

5. Dispatch Instructions are consistent with the Declared Characteristics of Balancing Service Entities.

6. Details regarding the issue and execution of mFRR Dispatch Instructions are provided in the Technical Decision ‘Dispatch Instructions’.

1. The HETS Operator may issue mFRR Test Dispatch Instructions to Balancing Service Entities whenever necessary and without prior notice.

2. The mFRR Test Dispatch Instructions transmitted to Dispatchable Generating Units relate to the activation of the Minimum or Maximum Available Capacity.

3. The mFRR Test Dispatch Instructions to the Dispatchable Load Portfolios and Dispatchable RES Unit Portfolios relate to activation of Balancing Energy corresponding to full activation of the Balancing Capacity awarded for mFRR.

4. The HETS Operator may issue a maximum of thirteen (13) Test Dispatch Instructions (mFRR)to a Balancing Service Entity in a rolling twelve (12) month period. If a Balancing Service Entity fails to comply with an mFRRTest Dispatch Instruction, the number of mFRR Test Dispatch Instructions issued during the previous twelve (12) month period shall be set to zero for the purposes of this calculation. In the event that a Balancing Service Entity complies with two consecutive mFRR Test Dispatch Instructions, the maximum number is reduced from 13 to 6.

5. Balancing Service Entities shall be obliged to comply with the mFRR Test Dispatch Instructions issued by the HETS Operator which relate to the volumes and time period for which a corresponding Test Dispatch Instruction has been issued. In the event of non-compliance with an mFRR Dispatch Instruction, Non-Compliance Charges shall be imposed on the respective Balancing Service Provider, calculated in accordance with Article 22.3 of this Rulebook.

6. Details on the procedure for issuing mFRR Test Dispatch Instructions are provided in the Technical Decision ‘Dispatch Instructions’.