Analysis of Requirement and Cost of Automatic Frequency Restoration Reserve of the Kosovo Power System

The article presents analyses of the requirement and cost of the Automatic Frequency Restoration Reserve (aFRR) in the Kosovo Electric Power System. It is based on estimations of the maximum system load as one of the main factors to calculate the required amount of aFRR, as well as on the price of aFRR capacity in the balancing market to obtain the aFRR procurement cost. The model is constructed using deterministic methodology defined in the ENTSO-E (European Network of Transmission System Operators) manual and maximum system load in different time frames. The aim is to conclude concerning the impact of the duration of the single time interval on which base the calculations for satisfaction of the aFRR requirement are performed on the amount and cost of aFRR. This impact is illustrated with some numerical examples.