In the introduction, the thesis presents the basic geographic and demographic characteristics of Postojna and the distribution network in the Municipality of Postojna. It indicates some key information about the Postojna power substation and its power supply. The thesis continues by showing the occurrence of ice load in the winter; it presents the conditions for the formation of extra loads and areas in Slovenia where sleet is most common. Next it presents a chronological description of sleet occurrence in the Municipality of Postojna in the beginning of 2014 and the impacts on EPS (Electric Power System). At the same time it shows the technical solutions that have been made at this time. A discussion of different power options of the Postojna power substation with graphically and descriptively presented solutions follows. In the conclusion, the author evaluates his work and comments on the presented solutions.