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scientific master's theses
Utjecaj zasićenja strujnih transformatora na rad zaštitnih releja
Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing, 2009. urn:nbn:hr:168:555874
Bančak, Jasna
University of Zagreb
Faculty of Electrical Engineering and Computing
Department of Energy and Power Systems

Cite this document

Bančak, J. (2009). Utjecaj zasićenja strujnih transformatora na rad zaštitnih releja (Scientific master's theses). Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing. Retrieved from https://urn.nsk.hr/urn:nbn:hr:168:555874

Bančak, Jasna. "Utjecaj zasićenja strujnih transformatora na rad zaštitnih releja." Scientific master's theses, University of Zagreb, Faculty of Electrical Engineering and Computing, 2009. https://urn.nsk.hr/urn:nbn:hr:168:555874

Bančak, Jasna. "Utjecaj zasićenja strujnih transformatora na rad zaštitnih releja." Scientific master's theses, University of Zagreb, Faculty of Electrical Engineering and Computing, 2009. https://urn.nsk.hr/urn:nbn:hr:168:555874

Bančak, J. (2009). 'Utjecaj zasićenja strujnih transformatora na rad zaštitnih releja', Scientific master's theses, University of Zagreb, Faculty of Electrical Engineering and Computing, accessed 14 January 2025, https://urn.nsk.hr/urn:nbn:hr:168:555874

Bančak J. Utjecaj zasićenja strujnih transformatora na rad zaštitnih releja [Scientific master's theses]. Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing; 2009 [cited 2025 January 14] Available at: https://urn.nsk.hr/urn:nbn:hr:168:555874

J. Bančak, "Utjecaj zasićenja strujnih transformatora na rad zaštitnih releja", Scientific master's theses, University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, 2009. Available at: https://urn.nsk.hr/urn:nbn:hr:168:555874

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Metadata
TitleUtjecaj zasićenja strujnih transformatora na rad zaštitnih releja
Title (english)Impact of current transformer saturation on protection relays
AuthorJasna Bančak
VIAF: 305688134
MentorAnte Marušić (mentor)
Committee memberZlatko Maljković (predsjednik povjerenstva)
Committee memberAnte Marušić (član povjerenstva)
Committee memberStjepan Štefan (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Electrical Engineering and Computing
(Department of Energy and Power Systems)
Zagreb
Defense date and country2009-02-06, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Electrical Engineering
Power Engineering
Universal decimal classification
(UDC)		621.3 - Electrical engineering
Abstract
Zadatak ovog rada je bio razvoj prihvatljivog modela zasićenja strujnog transformatora, čiji se rezultati mogu koristiti za proučavanje ponašanja strujnog transformatora tijekom zasićenja te utjecaja koje to zasićenje ima na rad zaštitnih releja. Model zasićenja strujnog transformatora je nakon potvrde točnosti iskorišten za ispitivanje utjecaja koje na zasićenje strujnog transformatora imaju sekundarno opterećenje, iznos struje kvara, vremenska konstanta primarnog sustava, istosmjerna komponenta i remanencija u jezgri. Utjecaj zasićenja na nadstrujnu i diferencijalnu zaštitu ispitivan je injektiranjem struja dobivenih simulacijama zasićenja. Rezultati ispitivanja su dobiveni usporedbom oscilograma struja i pokazali su da releji ponekad mogu ispravno i stabilno raditi čak i kada strujni transformatori ne odgovaraju zahtjevima proizvođača releja. Ispitivanja su dokazala da se model zasićenja strujnog transformatora može koristiti kao pripomoć u izboru ekonomičnijih strujnih transformatora.
Abstract (english)
The objective of this thesis was a development of an accurate model of saturated current transformer, with a results useful for an investigation of current transformer saturation and the impact of that saturation on protection relays. Model of current transformer saturation was validated, and afterwards used for an evaluation of factors that led to current transformer saturation, like secundary burden, short circuit level, DC components in fault current and remanent flux. Overcurrent and differential protection relays were testes to investigate the impact current transformer saturation had on them. Saturated currents were injected to the relays via a secondary injection device. Result comparison of current oscilograms obtained from simulation and from relay, showed that relays in some cases were able to accurately work even when current transformers didn't meet the requirements of relay manufacturer. This analysis demonstrated the helpfullnes of current transformer saturation model in selecting more apropriate current transformer for a specific cases.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:168:555874
Study programmeTitle: Postgraduate master programme in electrical engineering
Study programme type: university
Study level: postgraduate
Academic / professional title: Magistar znanosti elektrotehnike (Magistar znanosti elektrotehnike)
Type of resourceText
File originBorn digital
Access conditionsClosed access
Terms of useLicence In copyright icon
RepositoryFER Repository
Created on2020-06-23 10:36:02

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