Due to changes in the electricity power system, which are caused by rising electricity consumption, high growth rate of electrification energy, changing patterns of consumption and rapid integration of the production of renewable electricity, a necessity for optimal exploitation of the transmission infrastructure is becoming increasingly important topic. On the other hand, the construction of new electric transmission paths across the Europe is extremely problematic due to public opposition and civil associations. Therefore, almost the only possibility is the exploitation of the existing devices towards the frontiers. Electricity networks will need to be designed, constructed, maintained and managed in such a way that they will overcome all of the above mentioned challenges. The pressure on the utilization of existing and future elements of the transmission network will be growing in the future. Therefore, ELES is within the framework of the project System for the determination of the limits of operation (SUMO), establishing a system for the dynamic thermal performance of transmission lines, the so-called DTR (Dynamic Thermal Rating), which will in a transparent manner provide the Transmission System Operator an assessment of the transmission capacity, given the current and projected atmospheric conditions and the load of the EES.
The thesis presents the current technology and state of DTR in Europe. In the following, the main elements of the project SUMO are described. As part of the introduction of the DTR the importance of overhead lines on the basis of which the reasonableness of the use of DTR will be determinated is identified and the technology that will be used for a single transmission line in the Slovenian electricity transmission network. For this purpose, the methodology is presented and the criteria function proposed. As the final result, for each power line of the Slovenian electricity transmission network the priority for the introduction of the DTR and its required accuracy is given.