20.500.12556/DKUM-88820 Izračun elektromagnetnega polja v okolici ozemljitvenega sistema ob udaru strele magistrsko delo Computation of electromagnetic field in the surrounding of the grounding system during a lightning strike V magistrskem delu smo analizirali električni potencial in napetost koraka na površini zemlje v prisotnosti ozemljitvene mreže. To smo storili tako, da smo najprej določili enoplastni in triplastni model zemlje. Podatke za določitev modelov smo pridobili iz meritev, pri čemer smo uporabili Wennerjevo metodo. Enoplastni model smo določili iz povprečja izmerjenih vrednosti specifične upornosti, medtem ko smo triplastni model določili s pomočjo optimizacijskih metod. Nato smo v programu Flux 3D izdelali različne modele zemlje z ozemljitveno mrežo. Ta je imela različno gostoto in se je nahajala na treh različnih globinah. Na opisanih modelih smo simulirali udar strele in analizirali potencial na površini in v globini zemlje. Iz potencialov smo izračunali napetost koraka in jo za obravnavane scenarije med seboj primerjali. In the master’s thesis, we analyzed the electric potential and step voltage on the soil surface in the presence of a grounding grid. This was done by first determining a single- layer and a three-layer soil model. The data for determining the models were obtained from measurements using the Wenner method. The single-layer model was determined from the average of the measured specific electrical resistance values, while the three-layer model was determined using optimization methods. Then, various soil models with a grounding grid were created in Flux 3D software. The grounding grid had different densities and was situated at three different soil depths. On the models described above simulations of a lightning strike were done. After that, the potential at the surface and volume of the soil were analysed. From electric potentials, the step voltage for the considered scenarios was calculated and compared with each other. Prenapetosti ozemljitvena mreža potencial napetost koraka Overvoltages grounding grid electric potencial step voltage true true false [D. Osojnik] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2024-05-27 17:42:54 2024-07-02 07:20:56 2024-09-04 05:14:15 0000-00-00 00:00:00 2024 0 Maribor 0 Maribor 1 spletni vir (1 datoteka PDF (XVIII, 84 f.)) 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.316.99.015.3(043.2) 206139907 MAG_Osojnik_Danilo_2024.pdf MAG_Osojnik_Danilo_2024.pdf 1 EFE0E8051A7B9B9D7917E1FCD00D1980 467d8e9527b95d6d8f40efc5496cc6dba1c54abaccb665dc75da4ccacf28eaa6 3567f635-37c6-11ef-836b-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=180949 Fakulteta za elektrotehniko, računalništvo in informatiko 0 0 0