20.500.12556/DKUM-16801 NOTRANJE OKVARE V RAZDELJEVALNEM OMREŽJU THE INTERNAL FAULTS IN ELECTRODISTRIBUTION NETWORK Magistrska naloga opisuje obratovalne posebnosti, ki imajo vpliv na nastanek notranjih okvar v stikalni napravi in s tem na zanesljivost delovanja elektroenergetskega omrežja. Na osnovi tega so bili analizirani vzroki za nastanek okvar. Kot posebnost obratovanja raziskan električni oblok, ki je posledica notranjih okvar izolacije. Ta je v stikalni napravi podvržena staranju pri prenapetostnih obremenitvah, ki nastanejo ob enofaznih zemeljskih stikih, spremembi obratovalnih stanj in atmosferskih prenapetostih. Na staranje izolacije, vpliva intenzivnost delnih praznitev, ki ne povzročijo takojšnega preboja izolacije, povzročajo pa motnje v okolju in po določenem času tudi okvare. Raziskan je pojav delnih praznitev in izbrane so razne merilne metode, s katerimi lahko ocenjujemo stanje in preostalo življenjsko dobo izolacije. Podane so praktične rešitve za zmanjšanje števila notranjih okvar; z njimi lahko izboljšamo preventivno vzdrževanje elektroenergetskih naprav. Izdelan je postopek spremljanja delnih praznitev trdne izolacije. The master thesis describes operative particularities that influence the emergence of internal faults in switchgears, thereby influencing the reliability of the operation of electricity distribution networks. This served as the basis for an analysis of causes for the emergence of faults. An operation specialty, the electrical arc, has been researched as one of the main consequences of internal faults in the insulation. Insulation in switchgears is subject to ageing through high voltage loads which are created in single phase earth contacts, changes in operative states and atmospheric overloads. The ageing of insulation is also influenced by the intensity of partial discharges that do not cause immediate breaches of insulation, but create disturbances in the environment and eventually result in faults over time. The emergence of partial discharges has been explored and various methods of measurement have been selected to evaluate the state and remaining life of the insulation. Practical solutions for reducing the number of internal faults are provided, along with measures for improving the preventive maintenance of electrical devices. A procedure is proved for the monitoring of partial discharges into solid insulation. Notranja okvara stikalna naprava distribucijsko omrežje električni oblok električna poljska jakost delne praznitve korona trdni dielektrik. Internal fault switchgear electrodistribution network electrical arc electric field strength partial discharge corona solid insulation. true true false [M. Zorman] Slovenski jezik Angleški jezik Magistrsko delo 2010-11-22 18:57:47 2011-01-06 09:48:23 2022-04-13 08:55:14 2023-12-21 03:18:05 2010 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.3.014.31:621.316.542 14721814 URN:SI:UM:DK:NA33QDL0 MAG_Zorman_Marjan_2010.pdf MAG_Zorman_Marjan_2010.pdf 1 27CFC6BBAA7137FC77D7AB92A3B0A463 2df60307f8836c317f406a36a0787d70792a56c76b8c7ca00cc73f5f76733123 bbcb078e-7c04-11eb-bb7a-00155d0001ca 20.500.12556/dkum/ca5d9144-b13a-469f-adfe-988dc8cb6b89 https://dk.um.si/Dokument.php?lang=slv&id=19224 Fakulteta za elektrotehniko, računalništvo in informatiko 0 0 0