20.500.12556/RUL-186526 Načrtovanje in verifikacija ozemljil VN daljnovodnih stebrov Design and Verification of Grounding Systems for High-Voltage Transmission Line Towers Diplomsko delo obravnava optimizacijo in verifikacijo ozemljitvenih sistemov daljnovodnih visokonapetostnih stebrov. Učinkovito ozemljilo je ključno za zaščito pred nevarnimi napetostmi dotika in koraka ter za preprečevanje povratnih prebojev izolacije ob udarih strel. Dimenzioniranje pogosto temelji na posplošenih predpostavkah iz standarda SIST-EN 50341-2-21-2023 NNA, kar lahko vodi do neustreznosti oz. pretiranih ozemljil. Na primeru 110 kV daljnovoda Hudo–Kočevje (stojni mesti SM 84 in SM 86) so bili analizirani podatki o strelah iz sistema SCALAR, terenske meritve specifične upornosti tal po Wennerjevi metodi, na podlagi katerih so bili v programu CDEGS izdelani večplastni modeli tal in meritve ozemljitvene upornosti na posameznih stojnih mestih. V izračunih verifikacije ozemljitvene upornosti je bil ovrednoten tudi vpliv nelinearne ionizacije tal ob visokih udarnih tokovih. Rezultati kažejo, da uporaba realnih podatkov o strelah iz sistema SCALAR omogoča bistveno natančnejšo določitev potrebne ozemljitvene upornosti stebrov. S tem se izognemo predimenzioniranju in neposredno zmanjšamo stroške vkopa ozemljitvenega traku ter obseg nepotrebnih posegov v naravno okolje. This diploma thesis addresses the optimization and verification of grounding systems for high-voltage transmission line towers. An effective grounding system is critical for protection against dangerous touch and step voltages and for preventing insulation back-flashovers during lightning strikes. Dimensioning often relies on generalized assumptions from the SIST-EN 50341-2-21:2023 NNA standard, which can lead to inadequate or over-dimensioned grounding systems. Using the case study of the 110 kV Hudo–Kočevje transmission line (tower locations SM 84 and SM 86), lightning data from the SCALAR system were analyzed, along with field measurements of soil resistivity using the Wenner method—which served as the basis for multi-layer soil models developed in CDEGS—and grounding resistance measurements at individual tower locations. The effect of non-linear soil ionization under high impulse currents was also evaluated in the grounding resistance verification calculations. The results show that using real lightning data from the SCALAR system enables a significantly more accurate determination of the required tower grounding resistance. This avoids over-dimensioning and directly reduces grounding tape trenching costs as well as the extent of unnecessary environmental impacts. ozemljitveni sistem VN daljnovodni steber specifična upornost tal CDEGS SCALAR udarna ozemljitvena upornost metode merjenja ozemljitvene upornosti ionizacija tal. grounding system HV transmission line tower soil resistivity CDEGS SCALAR impulse grounding resistance grounding resistance measurement methods soil ionization true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-09-02 15:31:59 2026-09-02 15:32:06 2026-09-03 04:39:47 0000-00-00 00:00:00 2026 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 63425 Ozebek_Gal_-_Nacrtovanje_in_verifikacija_ozemljil_VN_daljnovodnih_stebrov.pdf Ozebek_Gal_-_Nacrtovanje_in_verifikacija_ozemljil_VN_daljnovodnih_stebrov.pdf 1 7994ADEC245AE2D4FEB317F7C3072CA3 8b5f07e6dd4338a7c3e123034a7f7debb3a87ef9479ae9544a6ab3912f3645e8 4397d5c0-a6d2-11f1-9b0d-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=245799 Fakulteta za elektrotehniko 0 0 0