Modifikacija celuloznog papira za transformatore

undergraduate thesis

• Title (english): Modification of cellulose paper for transformers
• Author: Mateja Benić
• Mentor: Elvira Vidović (mentor)
• Committee member: Elvira Vidović (predsjednik povjerenstva)
• Committee member: Fabio Faraguna (član povjerenstva)
• Committee member: Marijana Kraljić Roković (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2015-09-15, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering; Chemical Engineering in Material Development

Abstract

Unutarnji dijelovi energetskog transformatora koji su pod naponom, izolirani su pomoću papirne izolacije i uronjeni su u izolacijsko ulje. Stoga se izolacijsko ulje i papirna izolacija ispituju prvi kad se jave problemi u radu energetskog transformatora. Stanje izolacije u energetskom transformatoru važan je pokazatelj preostalog životnog vijeka. Poboljšanja u obliku toplinski otpornijeg papira i uporaba biljnog ulja kao alternativa mineralnom, nose probleme vezane za praćenje sustava postojećim uhodanim metodama. Koristi se nekoliko kemijskih tehnika kojima se može utvrditi stanje izolacijskog papira, a to su određivanje stupnja polimerizacije, koncentracija ugljikovih oksida, analiza furana i metanola, te metoda pranja sa organskim spojevima. Pored kemijskih metoda postoje i dielektrične metode: PDC (metoda mjerenja struja polarizacije i depolarizacije), FDS (frekventno zavisna spektroskopija) i RVM (metoda mjerenja povratnog napona).

Abstract (english)

Internal parts of the power transformer are isolated using paper insulation and are immersed in insulating oil. Hence, transformer oil and paper insulation are first to be examined when problems and faults occur related to the work of power transformator. Insulation condition of a power transformer largely determines its remaining lifetime. Improvements in the form of more heat-resistant paper and use vegetable oil as an alternative to mineral bring problems associated with the monitoring of the system with common methods. Several chemical diagnoses techniques are developed to examine the condition of paper insulation such as degree of polymerization, carbon oxides, furanic compounds, methanol, and washing with surface-active substances. in addition to chemical methods there are also dielectric methods: PDC (Polarization and Depolarization Current Method), FDS (Frequency Domain Spectroscopy) and RVM (Recovery Voltage Measurement).

• Keywords: papirna izolacija; stupanj polimerizacije; analiza furana; analiza metanola; površinski aktivne tvari; dielektrične metode
• Keywords (english): paper insulation; degree of polymeriation; furan analysis; methanol analysis; surface-active substances; dielectric methods
• Language: croatian
• URN:NBN: urn:nbn:hr:149:912316
• Study programme: Title: Environmental Engineering - Undergraduate study; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka ekoinženjerstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka ekoinženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2016-11-26 14:03:15