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undergraduate thesis
Modeliranje kvarova u elektroenergetskim mrežama
Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing, 2014. urn:nbn:hr:168:070659
Gržanić, Mirna
University of Zagreb
Faculty of Electrical Engineering and Computing

Institutional repository: FER Repository

Cite this document

Gržanić, M. (2014). Modeliranje kvarova u elektroenergetskim mrežama (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing. Retrieved from https://urn.nsk.hr/urn:nbn:hr:168:070659

Gržanić, Mirna. "Modeliranje kvarova u elektroenergetskim mrežama." Undergraduate thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, 2014. https://urn.nsk.hr/urn:nbn:hr:168:070659

Gržanić, Mirna. "Modeliranje kvarova u elektroenergetskim mrežama." Undergraduate thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, 2014. https://urn.nsk.hr/urn:nbn:hr:168:070659

Gržanić, M. (2014). 'Modeliranje kvarova u elektroenergetskim mrežama', Undergraduate thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, accessed 19 December 2024, https://urn.nsk.hr/urn:nbn:hr:168:070659

Gržanić M. Modeliranje kvarova u elektroenergetskim mrežama [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing; 2014 [cited 2024 December 19] Available at: https://urn.nsk.hr/urn:nbn:hr:168:070659

M. Gržanić, "Modeliranje kvarova u elektroenergetskim mrežama", Undergraduate thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, 2014. Available at: https://urn.nsk.hr/urn:nbn:hr:168:070659

Metadata
TitleModeliranje kvarova u elektroenergetskim mrežama
Title (english)Fault Modelling in Electric Power Systems
AuthorMirna Gržanić
MentorMarko Delimar (mentor)
Committee memberMarko Delimar (predsjednik povjerenstva)
Committee memberPerica Ilak (član povjerenstva)
Committee memberNinoslav Holjevac (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Electrical Engineering and Computing
Zagreb
Defense date and country2014-07-14, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Electrical Engineering
Abstract
Kratki spoj je kvar u mreži koji nastaje uslijed međusobnog spajanja dijelova mreže koji su na različitim potencijalima. Uzroci su brojni: mehanička oštećenja, povećanje napona, pogrješke pri upravljanju sustavom, atmosferske prilike, sniženja razine izolacijske čvrstoće ili slom izolacije. Posljedice su pojave velike struje krakog spoja, velikih pada napona i brojna oštećenja. U trofaznim sustavima postoje četiri vrste kratkih spojeva: trofazni, dvofazni, jednofazni i dvofazni kratki spoj sa zemljom. Struja kratkog spoja sadrži izmjeničnu i istosmjernu komponentu. Postoje tri struje na temelju kojih se izabire oprema za elektroenergetski sustav: udarna struja kratkog spoja, rasklopna struja kratkog spoja i struja mjerodavna za ugrijavanje za vrijeme trajanja kratkog spoja (termička struja). Metode proračuna struja kratkih spojeva je metoda nadomjesnog naponskog izvora te proračun s relativnim jediničnim vrijednostima. Metoda nadomjesnog naponskog izvora je svođenje svih impedancija na isti (bazni) napon. Kod proračuna s relativnim jediničnim vrijednostima struje, naponi, impedancije i snage se izražavaju u odnosu na neke osnovne veličine.
Abstract (english)
Short circuit is a malfunction in the grid which appears when parts of the grid with different potentials are connected to each other. There are many causes of short circuit: mechanical damage, voltage incresse, atmospheric conditions, insolation damage, etc. There are four types of short circuits in three-phase systems: three-phase, two-phase, single-phase and two-phase grounded short circuit. Short circuit current includes AC and DC component. There are three types of electrical current based on which is selected equipment for electrical-energetic system: maximum short circuit, short-circuit breaking current and current responsible for warming up the system during the short-circut (thermal current). Methods for short-circuit current calculations is method of replacement voltage source and the sum with relative unit values. Method of replacing voltage source impedance is reducing all the same (base) voltage. When calculating the relative unit values of current, voltage, impedance and power are expressed in relation to some basic size.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:168:070659
Study programmeTitle: Electrical Engineering and Information Technology
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka elektrotehnike i informacijske tehnologije (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka elektrotehnike i informacijske tehnologije)
Type of resourceText
File originBorn digital
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Created on2018-02-05 17:33:42