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master's thesis
Utjecaj uzemljenja zvjezdišta elektroenergetskih mreža na struje jednopolnog kvara
2015. urn:nbn:hr:200:964002
Tokić, Željko
Josip Juraj Strossmayer University of Osijek
Faculty of Electrical Engineering, Computer Science and Information Technology Osijek
Department of Power Engineering
Chair of Power Plants and Energy Processes

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Tokić, Ž. (2015). Utjecaj uzemljenja zvjezdišta elektroenergetskih mreža na struje jednopolnog kvara (Master's thesis). Osijek: Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek. Retrieved from https://urn.nsk.hr/urn:nbn:hr:200:964002

Tokić, Željko. "Utjecaj uzemljenja zvjezdišta elektroenergetskih mreža na struje jednopolnog kvara." Master's thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, 2015. https://urn.nsk.hr/urn:nbn:hr:200:964002

Tokić, Željko. "Utjecaj uzemljenja zvjezdišta elektroenergetskih mreža na struje jednopolnog kvara." Master's thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, 2015. https://urn.nsk.hr/urn:nbn:hr:200:964002

Tokić, Ž. (2015). 'Utjecaj uzemljenja zvjezdišta elektroenergetskih mreža na struje jednopolnog kvara', Master's thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, accessed 26 January 2025, https://urn.nsk.hr/urn:nbn:hr:200:964002

Tokić Ž. Utjecaj uzemljenja zvjezdišta elektroenergetskih mreža na struje jednopolnog kvara [Master's thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek; 2015 [cited 2025 January 26] Available at: https://urn.nsk.hr/urn:nbn:hr:200:964002

Ž. Tokić, "Utjecaj uzemljenja zvjezdišta elektroenergetskih mreža na struje jednopolnog kvara", Master's thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, Osijek, 2015. Available at: https://urn.nsk.hr/urn:nbn:hr:200:964002

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Metadata
TitleUtjecaj uzemljenja zvjezdišta elektroenergetskih mreža na struje jednopolnog kvara
Title (english)Influence of Network Grounding on Single Phase Short Circuit Currents
AuthorŽeljko Tokić
MentorLajos Jozsa (mentor)
MentorKrešimir Fekete (mentor)
Committee memberLajos Jozsa (predsjednik povjerenstva)
Committee memberGoran Knežević (član povjerenstva)
Committee memberKrešimir Fekete (član povjerenstva)
GranterJosip Juraj Strossmayer University of Osijek
Faculty of Electrical Engineering, Computer Science and Information Technology Osijek
(Department of Power Engineering)
(Chair of Power Plants and Energy Processes)
Osijek
Defense date and country2015-10-05, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Electrical Engineering
Power Engineering
Abstract
Glavni zadatak rada bio je opisati utjecaj uzemljenja zvjezdišta transformatora na struju jednofaznog kvara. Nakon uvodnog poglavlja, opisuje se kratki spoj, njegove fizikalne osnove te vremenski tijek struje kvara u ovisnosti o mjestu nastanka kratkog spoja. Treće poglavlje opisuje proračun kratkog spoja , postupak pretvaranja nesimetričnog sustava u simetrični, čime se olakšava proračun i prikazan je način određivanja nadomjesnih impedancija pojedinih elemenata elektroenergetskog sustava. Kroz četvrto poglavlje opisan je matematički model jednofaznog kvara te prednosti i nedostaci pri različitim tretmanima zvjezdišta. Zadnje poglavlje sastoji se od dva dijela. U prvom dijelu prikazan je ručni proračun struje jednofaznog kvara na sabirnici, a u drugom dijelu izvršena je analiza osjetljivosti jednofaznog kvara u ovisnosti o tretmanu zvjezdišta. Odabir načina uzemljenja ovisi o konkretnoj situaciji za pojedino postrojenje te se moraju promatrati prednosti i nedostaci pojedinih načina uzemljenja.
Abstract (english)
The main goal of the thesis was to describe the effects of grounded Y connection of the transformer on the short circuit single phase current. After the introduction chapter, the short circuit is described, its physical preferences and the time diagram of the current in correlation with the place of the shortening. Third chapter describes the short circuit calculations, the transformation of a non-symmetrical system to a symmetrical one, which in turn simplifies calculations. A way of determining impedance of elements of the grid system is also shown. Throughout the forth chapter a mathematical model of a single phase short circuit is described, and advantages and disadvantages of different connection types are shown. The last chapter consists of two parts. The first part shows a calculation of single phase short circuit current on the bus bar, and the second part shows the analysis of sensitivity of the short circuit depending on the connection type. The selection of method used to ground a transformer depends of the situation of each individual transformer and advantages and limitations of each must be considered.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:200:964002
Study programmeTitle: Graduate University Study Programme in Electrical Engineering; specializations in: Communications and Informatics, Power Engineering
Course: Power Engineering
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike (magistar/magistra inženjer/inženjerka elektrotehnike)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2016-08-02 11:16:11