Transformatorsko ulje i indeks pouzdanosti energetskih transformatora

master's thesis

• Title (english): Electrical insulating oil and health index of power transformers
• Author: Lorena Gusak
• Mentor: Viktor Milardić (mentor)
• Committee member: Viktor Milardić (predsjednik povjerenstva)
• Committee member: Ivica Pavić (član povjerenstva)
• Committee member: Božidar Filipović-Grčić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2017-07-07, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

Indeks pouzdanosti daje podatak u kakvom je stanju energetski transformator. Kvaliteta ulja je važan pokazatelj za procjenu stanja transformatora. U prilog tome govori i činjenica da analiza furana u ulju daje vrlo točnu mjeru za stanje papirne izolacije jer je količina furana povezana sa stupnjem polimerizacije papira. Osim toga, analizom razina otopljenih plinova u ulju također se identificira električno pražnjenje, stvaranje luka i termička aktivnost (povećano zagrijavanje) unutar transformatora. Konačni cilj diplomskog rada je razvijanje sustavne metode za određivanje indeksa pouzdanosti bilo kojeg transformatora koji bi se potom koristio za klasifikaciju stanja. Određivanje očekivanog vijeka trajanja i pravog trenutka zamjene ključno je za izbjegavanje katastrofalnog kvara transformatora. Izračun indeksa pouzdanosti koji uz sebe veže jednostavan opis stanja transformatora omogućuje vlasniku transformatora jednostavan način za provjeru njegovog stanja.

Abstract (english)

Health index provides information about the condition of a power transformer. Oil quality can be a useful indicator for transformer condition assessment. The fact that the analysis of furan in oil gives a very accurate measure of the paper insulation condition, because the amount of furan is related to the degree of polymerization, also contributes to that. The analysis of the level of dissolved gases in the oil also identifies electrical discharge and thermal activity within the transformer. The ultimate goal is to develop a systematic method for determining the health index of any transformer and to use it as a classification of its condition. Life evaluation and replacement in the right moment is crucial to avoid disasters that can be caused by an unexpected loss of transformer. Calculating the health index of a transformer, which includes a simple description of the transformer's condition, provides the staff an easy way to check the condition of the equipment.

• Keywords: transformator; ulje; indeks pouzdanosti
• Keywords (english): transformer; oil; health index
• Language: croatian
• URN:NBN: urn:nbn:hr:168:493798
• Study programme: Title: Electrical Engineering and Information Technology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije (magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2019-03-13 20:44:15