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scientific master's theses
Analiza načina uzemljenja zvjezdišta sinkronog generatora
Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing, 2003. urn:nbn:hr:168:193139
Višić, Ivan
University of Zagreb
Faculty of Electrical Engineering and Computing
Department of Energy and Power Systems

Institutional repository: FER Repository

Cite this document

Višić, I. (2003). Analiza načina uzemljenja zvjezdišta sinkronog generatora (Scientific master's theses). Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing. Retrieved from https://urn.nsk.hr/urn:nbn:hr:168:193139

Višić, Ivan. "Analiza načina uzemljenja zvjezdišta sinkronog generatora." Scientific master's theses, University of Zagreb, Faculty of Electrical Engineering and Computing, 2003. https://urn.nsk.hr/urn:nbn:hr:168:193139

Višić, Ivan. "Analiza načina uzemljenja zvjezdišta sinkronog generatora." Scientific master's theses, University of Zagreb, Faculty of Electrical Engineering and Computing, 2003. https://urn.nsk.hr/urn:nbn:hr:168:193139

Višić, I. (2003). 'Analiza načina uzemljenja zvjezdišta sinkronog generatora', Scientific master's theses, University of Zagreb, Faculty of Electrical Engineering and Computing, accessed 27 August 2024, https://urn.nsk.hr/urn:nbn:hr:168:193139

Višić I. Analiza načina uzemljenja zvjezdišta sinkronog generatora [Scientific master's theses]. Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing; 2003 [cited 2024 August 27] Available at: https://urn.nsk.hr/urn:nbn:hr:168:193139

I. Višić, "Analiza načina uzemljenja zvjezdišta sinkronog generatora", Scientific master's theses, University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, 2003. Available at: https://urn.nsk.hr/urn:nbn:hr:168:193139

Metadata
TitleAnaliza načina uzemljenja zvjezdišta sinkronog generatora
Title (english)Synchronous generator grounding principles analysis
AuthorIvan Višić
MentorAnte Marušić (mentor)
Committee memberSejid Tešnjak (predsjednik povjerenstva)
Committee memberAnte Marušić (član povjerenstva)
Committee memberIvan Sarajčev (član povjerenstva)
Committee memberTomislav Tomiša (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Electrical Engineering and Computing
(Department of Energy and Power Systems)
Zagreb
Defense date and country2003, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Electrical Engineering
Power Engineering
Universal decimal classification
(UDC)		621.3 - Electrical engineering
Abstract
Zemljospoj statorskog namota najčešći je kvar sinkronog generatora i uzrok oštećenja statorskog namota generatora. Osim toga direktni je uzrok i međufaznih kvarova na generatoru. Svrha uzemljavanja zvjezdišta generatora preko određene impedancije je ograničenje štete na mjestu kvara, ograničenje prijelaznih prenapona i osiguranje osjetljive detekcije zemljospojeva na statorskom namotu generatora. U radu je nakon općih teorijskih razmatranja dan pregled metoda uzemljenja generatora i odgovarajućih shema štićenja. Detaljnija analiza napravljena je za visokoomsko i rezonantno uzemljenje generatora u blok spoju. Teorijska razmatranja provjerena su na praktičnom primjeru generatora iz elektroenergetskog sustava Hrvatske. Rezultati analize pokazuju da rezonantno uzemljenje ima niz prednosti u odnosu na visokoomsko uzemljenje. Šteta na mjestu kvara znatno je manja, dok je osjetljivost detekcije zemnih spojeva na bilo kojem mjestu u namotu generatora povećana kod rezonantnog uzemljenja. Kod rezonantnog uzemljenja naponi preneseni iz mreže veći su nego kod visokoomskog uzemljenja generatora, no ispravnim odabirom konstante prigušnice K mogu se svesti na normalne iznose.
Abstract (english)
Ground fault in stator windings is the most frequent fault in the synchronous generator and direct cause of phase-to-phase faults. The objective of grounding a synchronous generator system through the impedance is minimizing damage at the point of the fault, limiting transient overvoltages and providing sensitive detection of ground faults in generator system. A summary of generator protection schemes and generator grounding methods is given after general theoretical analysis. More detailed analysis has been done for high resistance and resonant grounding methods on unit-connected generators and applied on practical example from Croatian Power System. The results outlines the advantages of resonant grounding over high resistance grounding. The damage at the point of the fault is greatly reduced and the sensitivity of the detection for localized deterioration of insulation at any location in generator system is increased. Impressed overvoltages on generator system from transmission system will be higher in magnitude with resonant grounding than with resistor grounding but it can be controlled within acceptable limits by the proper selection of coil constant of the reactor.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:168:193139
Study programmeTitle: Postgraduate master programme in electrical engineering
Study programme type: university
Study level: postgraduate
Academic / professional title: Magistar znanosti elektrotehnike (Magistar znanosti elektrotehnike)
Catalog URLhttp://lib.fer.hr:8080/cgi-bin/koha/catalogue/detail.pl?biblionumber=29115
Type of resourceText
Extent77 str. ; 30 cm
File originBorn digital
Access conditionsClosed access
Terms of useLicence In copyright icon
Created on2019-07-08 08:58:33