20.500.12556/DKUM-97295 Measurement-based evaluation of distribution transformer losses characteristics for sustainable voltage regulation Merilno podprta analiza značilnosti izgub distribucijskih transformatorjev za trajnostno regulacijo napetosti This paper presents the characteristics of distribution transformer losses obtained on the basis of field measurements in a distribution grid. The active and reactive powers were recorded simultaneously at both 110 kV and 35 kV transformer voltage levels in different periods of the days, when the position of the on-load tap changer was changed intentionally. The variations of total transformer losses during these experiments were modelled by exponential models. The parameters of the models were grouped according to the particular daily periods, analysed statistically and compared with corresponding parameters of transformer load models. The importance was emphasised of knowing transformer losses characteristics in the networks with a significant share of distributed generation, energy storage systems and electric vehicles. Članek obravnava značilnosti izgub distribucijskih transformatorjev, določene na podlagi terenskih meritev v distribucijskem elektroenergetskem omrežju. Aktivna in jalova moč sta bili sočasno merjeni na transformatorskih napetostnih nivojih 110 kV in 35 kVv različnih obdobjih dneva, pri čemer je bil položaj obremenitvenega preklopnika (OLTC) namerno spreminjan. Spremembe skupnih izgub transformatorja med izvedenimi preizkusi so bile modelirane z eksponentnimi modeli. Parametri modelov so bili razvrščeni glede na posamezna dnevna obdobja, statistično analizirani ter primerjani z ustreznimi parametri modelov obremenitve transformatorja. Poudarjen je bil pomen poznavanja značilnosti izgub transformatorjev v omrežjih z velikim deležem razpršene proizvodnje, sistemov za shranjevanje energije in električnih vozil. distribution transformer measurements losses characteristics sustainability voltage regulation distribucijski transformator meritve izgube karakteristike trajnost regulacija napetosti true false true Angleški jezik Slovenski jezik Neznano 2026-02-26 14:02:53 2026-02-26 14:02:53 2026-02-27 03:17:46 0000-00-00 00:00:00 2025 0 0 str. 203-211 Št. 4 Letn. 18 dec. 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2025-11-24 2025-11-27 2025-12-31 620.9 268895747 1855-5748 Measurement-based_evaluation_of-Korunovic-2025.pdf Measurement-based_evaluation_of-Korunovic-2025.pdf 1 5ED6C75A3F634AD0197213CD415B6218 314abec5c0a8c9609e4d42eb85882ea3e9dff6f878b490d7333e44764e3d7a46 92e5b07a-1315-11f1-94ed-00155d580e1a https://dk.um.si/Dokument.php?lang=slv&id=203958 https://journals.um.si/index.php/jet/article/view/5655/3544 0 b1e2614b-1315-11f1-94ed-00155d580e1a https://dk.um.si/Dokument.php?lang=slv&id=203959 Fakulteta za energetiko Univerzitetna založba Univerze v Mariboru Journal of energy technology 0 0 0