Characteristics of the ground system HE Kraljevac
Abstract
The Kraljevac hydroelectric power plant was built on the Cetina River at the beginning of the 20th century and is one of the oldest hydroelectric power plants in this area. The Kraljevac substation in the immediate vicinity of the Kraljevac hydroelectric power plant is an important 110 kV node in the network. It is energetically connected to the Kraljevac hydroelectric power plant with the two aforementioned 110 kV transmission lines and one 35 kV line. The grounding systems of the Kraljevac substation and the Kraljevac hydroelectric power plant are connected, but they are not (or do not have to be) equipotential. The known connection between the grounding conductors is, in addition to the protective cables of the 110 kV transmission line and two Cu cables with a cross-section of 50 mm2 in the cable duct connecting the two plants. Unknown connections are also possible via insulated or grounded metal masses such as the water supply network. Therefore, it is impossible to calculate the longitudinal impedance of the connection between the grounding conductors with sufficient accuracy, but it should be determined by measurement. Knowing the longitudinal impedance is important in order to be able to assess the danger of carrying high potential from the TS facility to the hydroelectric power plant.
Stanko Milun
Full Professor
Faculty alumnus with a research focus in the development of measurement methods in high-voltage systems, signal analysis in electrical power systems, and the application of geoelectrical methods in energy infrastructure. Prof. Milun has been involved in numerous scientific projects, including those related to the optimization of grounding systems for high-voltage plants and the development of transient measurement methods. He has authored 38 scientific papers and over 150 professional studies.
Tomislav Kilić
Full Professor | Department of Electrical Measurements
Full professor at the at the Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture in Split, with professional reserch focus on power quality, signal analysis in electrical power systems, and measurement of process variables, alongside a significant role in the academic and administrative life of the University of Split.
Goran Petrović
Full Professor | Department of Electrical Measurements
Prof. dr. sc. Goran Petrović is a full professor at the Faculty of Electrical Engineering, Mechanical Engineering and Architecture in Split. His research interests include measurement of electrical and process quantities, analysis of geoelectrical and geothermal features of the soil, instrumentation for smart grids, measurement and application of synchrophasors. He is the author of numerous papers published in top-tier scientific journals and contributed to valuable international and national scientific projects.