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master's thesis
Analiza kvalitete transformatorskog ulja
2024. urn:nbn:hr:200:985046
Belik, Stefani
Josip Juraj Strossmayer University of Osijek
Faculty of Electrical Engineering, Computer Science and Information Technology Osijek
Department of Power Engineering
Chair of Power Systems and Substations

Cite this document

Belik, S. (2024). Analiza kvalitete transformatorskog ulja (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:200:985046

Belik, Stefani. "Analiza kvalitete transformatorskog ulja." Master's thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, 2024. https://urn.nsk.hr/urn:nbn:hr:200:985046

Belik, Stefani. "Analiza kvalitete transformatorskog ulja." Master's thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, 2024. https://urn.nsk.hr/urn:nbn:hr:200:985046

Belik, S. (2024). 'Analiza kvalitete transformatorskog ulja', Master's thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, accessed 18 February 2025, https://urn.nsk.hr/urn:nbn:hr:200:985046

Belik S. Analiza kvalitete transformatorskog ulja [Master's thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek; 2024 [cited 2025 February 18] Available at: https://urn.nsk.hr/urn:nbn:hr:200:985046

S. Belik, "Analiza kvalitete transformatorskog ulja", Master's thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, Osijek, 2024. Available at: https://urn.nsk.hr/urn:nbn:hr:200:985046

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Metadata
TitleAnaliza kvalitete transformatorskog ulja
Title (english)Analysis of the quality of transformer oil
AuthorStefani Belik
MentorGoran Knežević (mentor)
Committee memberGoran Knežević (predsjednik povjerenstva)
Committee memberKrešimir Fekete (član povjerenstva)
Committee memberRužica Kljajić (član povjerenstva)
GranterJosip Juraj Strossmayer University of Osijek
Faculty of Electrical Engineering, Computer Science and Information Technology Osijek
(Department of Power Engineering)
(Chair of Power Systems and Substations)
Osijek
Defense date and country2024-09-18, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Electrical Engineering
Power Engineering
Abstract
U ovome diplomskome radu opisana je podjela izolacijskih tekućina kod transformatora, obrađene su dijagnostičke metode za analizu izolacijskih tekućina te su prikazani zakoni i norme za uporabu transformatorskih ulja. Navedene stavke potrebno je poznavati kako bi se razumjeli postupci rada transformatora te postupci dijagnostike i održavanja transformatora. Pomoću tri ispitna uzorka ulja u praktičnom dijelu rada napravljena je analiza kvalitete ulja metodom ispitivanja dielektrične čvrstoće ulja pri temperaturi uzoraka od 30 ⁰C u prvom dijelu te pri hlađenju te ponovnom zagrijavanju uzoraka ulja na željene temperature, u drugome dijelu . Analizom rezultata dobivenih ispitivanjem pomoću mjernog uređaja Megger OTS60PB zaključeno je kako dva od tri ispitna uzorka ne pripadaju najvišem razredu kvalitete prema kriteriju minimalne vrijednosti napona dielektričnog proboja prema normi IEC 60156 koja je korištena u ovome radu te da vrijednost napona proboja snižavanjem temperature pada, odnosno da porastom temperature se ta vrijednost uvećava.
Abstract (english)
In this thesis, the classification of insulating fluids in transformers is described, diagnostic methods for the analysis of insulating fluids are covered, and laws and standards for the use of transformer oils are presented. Understanding these elements is essential for comprehending the operational procedures of transformers as well as the diagnostic and maintenance procedures for transformers. In the practical part of the work, the quality of three oil samples was analyzed using the dielectric strength testing method. This analysis was conducted at an initial sample temperature of 30°C in the first part and involved cooling and reheating the oil samples to desired temperatures in the second part. Based on the results obtained from testing with the Megger OTS60PB device, it was concluded that two out of the three tested samples do not meet the highest quality grade according to the minimum dielectric breakdown voltage value criteria specified by the IEC 60156 standard used in this study. Additionally, it was observed that the breakdown voltage decreases with a reduction in temperature and increases with a rise in temperature.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:200:985046
Study programmeTitle: Graduate university study programme in Electrical Engineering (branches: Power Engineering and Communications and Informatics; specializations in: Engineering, Power Engineering and Communications, Communications and Informatics
Course: Engineering
Study programme type: university
Study level: graduate
Academic / professional title: sveučilišni/a magistar/magistra inženjer/inženjerka elektrotehnike (sveučilišni/a magistar/magistra inženjer/inženjerka elektrotehnike)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2024-10-11 09:45:19