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undergraduate thesis
Proračun kratkog spoja u elektroenergetskim mrežama
Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing, 2015. urn:nbn:hr:168:253855
Pletikosa, Ivica
University of Zagreb
Faculty of Electrical Engineering and Computing

Institutional repository: FER Repository

Cite this document

Pletikosa, I. (2015). Proračun kratkog spoja u elektroenergetskim mrežama (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing. Retrieved from https://urn.nsk.hr/urn:nbn:hr:168:253855

Pletikosa, Ivica. "Proračun kratkog spoja u elektroenergetskim mrežama." Undergraduate thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, 2015. https://urn.nsk.hr/urn:nbn:hr:168:253855

Pletikosa, Ivica. "Proračun kratkog spoja u elektroenergetskim mrežama." Undergraduate thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, 2015. https://urn.nsk.hr/urn:nbn:hr:168:253855

Pletikosa, I. (2015). 'Proračun kratkog spoja u elektroenergetskim mrežama', Undergraduate thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, accessed 17 November 2024, https://urn.nsk.hr/urn:nbn:hr:168:253855

Pletikosa I. Proračun kratkog spoja u elektroenergetskim mrežama [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing; 2015 [cited 2024 November 17] Available at: https://urn.nsk.hr/urn:nbn:hr:168:253855

I. Pletikosa, "Proračun kratkog spoja u elektroenergetskim mrežama", Undergraduate thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, 2015. Available at: https://urn.nsk.hr/urn:nbn:hr:168:253855

Metadata
TitleProračun kratkog spoja u elektroenergetskim mrežama
Title (english)Short-circuit calculations in electric power systems
AuthorIvica Pletikosa
MentorMarko Delimar (mentor)
Committee memberMarko Delimar (predsjednik povjerenstva)
Committee memberFrano Tomašević (član povjerenstva)
Committee memberGoran Grdenić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Electrical Engineering and Computing
Zagreb
Defense date and country2015-07-13, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Electrical Engineering
Abstract
Određivanje najvećih struja kratkog spoja jedan je od najvažnijih proračuna u elektroenergetskom sustavu. Budući da je u stanju kratkog spoja, sustav izložen najvećim mehaničkim i termičkim naprezanjima, za ispravno vladanje sustava nužno je njegove elemente dimenzionirati prema strujama kratkog spoja. Ovim radom objašnjen je utjecaj izoliranja energetskih transformatora na određene tipove kratkog spoja. Pokazuje se da struje trofaznog i dvofaznog kratkog spoja ne reagiraju na ovakve promjene, dok struje jednofaznog i dvofaznog kratkog spoja sa zemljom padaju. Najznačajnije promjene događaju se na sabirnicama koje su direktno spojene na energetske transformatore, budući da tu dolazi do najveće promjene nulte impedancije. Za kratke spojeve na sabirnicama daleko od transformatora, ne dolazi do značajne promjene nulte impedancije pa time ni struja jednofaznog i dvofaznog kratkog spoja sa zemljom. Simulirani su pogonski uvjeti u kojima su dominantni dvofazni i dvofazni kratki spoj sa zemljom, i to na način da se proračun vršio sa stacionarnim reaktancijama generatora.
Abstract (english)
Determening the amplitude of the dominant short circuit currents is one of the most important calculations in electric power systems. In the state of short circuit, the system is exposed to biggest mechanical and termical strains, so it is crucial to construct elements of the system, according to the currents that occur in the state of short circuit. In this paper, I have explained the effect of isolating power transformators on some short circuit faults. Results have shown that currents from three-phase and two-phase short circuit do not react on these changes, while circuits from one-phase and two-phase short circuit with ground drop in value. The most significant changes occur on busbars which are directly connected to the power transformators, becouse in that spot, the biggest changes in zero impedance appear. For short circuits that occur on busbars far from transformators, these changes are not significant. I have simulated operating conditions in which two-phase and two-phase short circuit with the ground are the dominant types of short circuit.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:168:253855
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 on2018-02-06 11:20:49