Utjecaj uzemljenja zvjezdišta elektroenergetskih mreža na struje jednopolnog kvara

Tokić, Željko

master's thesis

Utjecaj uzemljenja zvjezdišta elektroenergetskih mreža na struje jednopolnog kvara

Osijek: Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, 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

Institutional repository: Faculty of Electrical Engineering, Computer Science and Information Technology Osijek

Cite this document

APA 6th Edition

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

MLA 8th Edition

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

Chicago 17th Edition

Harvard

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 14 May 2024, https://urn.nsk.hr/urn:nbn:hr:200:964002

Vancouver

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 2024 May 14] Available at: https://urn.nsk.hr/urn:nbn:hr:200:964002

IEEE

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

Cite this item: https://urn.nsk.hr/urn:nbn:hr:200:964002

Metadata

Title	Utjecaj uzemljenja zvjezdišta elektroenergetskih mreža na struje jednopolnog kvara
Title (english)	Influence of Network Grounding on Single Phase Short Circuit Currents
Author	Željko Tokić
Mentor	Lajos Jozsa (mentor)
Mentor	Krešimir Fekete (mentor)
Committee member	Lajos Jozsa (predsjednik povjerenstva)
Committee member	Goran Knežević (član povjerenstva)
Committee member	Krešimir Fekete (član povjerenstva)
Granter	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) Osijek
Defense date and country	2015-10-05, 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)
Language	croatian
URN:NBN	urn:nbn:hr:200:964002
Study programme	Title: 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 resource	Text
File origin	Born digital
Access conditions	Open access
Terms of use
Created on	2016-08-02 11:16:11

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