SECTION VI BALANCING MARKET SETTLEMENT

CHAPTER 19 IMBALANCE AND BALANCING ENERGY SETTLEMENT

Article 19.5 Calculation of System Imbalance

1. The System Imbalance, $S{I}_t$ shall be calculated for each Imbalance Clearance Period t as follows:

   $S{I}_t=\Delta P_t+k\Delta f_t-A{E}_t$

   Όπου:

   $\Delta P_t$	The imbalance between intended exchanges of active capacity through the interconnection points and metered values, in MW. The intended exchanges of active capacity at the HETS interconnection points do not include voluntary exchanges of active capacity pursuant to Article 50 of Regulation (EU) 2017/2195.
   $k\Delta f_t$	The HETS frequency control error, in MW, for the Imbalance Clearance Period t, that is, the product of the frequency deviation from the nominal value by the factor k (in mW/Hz) as defined in Article 156 (2) of Regulation (EU) 2017/1485.
   $A{E}_t$	The total activated energy in MW, corresponding to aFRR Dispatch Instructions for the Imbalance Settlement Period t, mFRR Dispatch Instructions, Test mFRR Dispatch Instructions, Dispatch Instructions for commitment, de-commitment or transition, and the Instructions for activation of mFRR Energy Offers for purposes other than balancing for a Balancing Settlement Period t.

2. In the above formula, export-related active capacity exchanges and upward activated energy are taken into account with a positive sign. By contrast, import-related active capacity exchanges and downward activated energy are taken into account with a negative sign.