master's thesis
Power transformer reliability

Krunoslav Zec (2015)
Sveučilište Josipa Jurja Strossmayera u Osijeku
Fakultet elektrotehnike, računarstva i informacijskih tehnologija Osijek
Zavod za elektroenergetiku
Katedra za elektroenergetske mreže i postrojenja
Metadata
TitlePouzdanost energetskog transformatora
AuthorKrunoslav Zec
Mentor(s)Marinko Stojkov (thesis advisor)
Abstract
U radu su opisani modeli mehanizama degradacije koji se izražavaju pomou razliitih parametara kvalitete a fokus je bio na degradaciji izolacijskog papira. U drugom poglavlju opisane su razliite metode odreivanja pouzdanosti transformatora, odnosno raunanja preostalog životnog vijeka transformatora. Najpouzdaniji nain odreivanja stanja izolacijskog papira je preko stupnja polimerizacije, što je i obraeno u 4.poglavlju. U treem poglavlju je opisan pojam stupnja polimerizacije, te razliite metode kojima se odreuje stanje izolacije (temperatura toplinskih toaka transformatorskog ulja, uzimanje uzoraka papira i odreivanje stupnja polimerizacije a obraena je i posredna metoda odreivanja stupnja polimerizacije pomou odreivanja furana u transformatorskom ulju, a spomenuto je da je koliina furana direktan pokazatelj stupnja polimerizacije). Pokazano je takoer da se korištenjem više paralelno spojenih transformatora poveava pouzdanost sustava na kojem su spojeni jer jedan uvijek služi kao rezerva. etvrto poglavlje daje realne primjere odreivanja preostalog životnog vijeka transformatora pomou stupnja polimerizacije i furan analize, te je prikazano stanje transformatorskog sustava Elektre Slavonski Brod.
KeywordsReliability degree of polymerization furan analysis paper degradation insulating paper
Parallel title (English)Power transformer reliability
Committee MembersMarinko Stojkov (committee chairperson)
Zvonimir Klaić (committee member)
Hrvoje Glavaš (committee member)
GranterSveučilište Josipa Jurja Strossmayera u Osijeku
Fakultet elektrotehnike, računarstva i informacijskih tehnologija Osijek
Lower level organizational unitsZavod za elektroenergetiku
Katedra za elektroenergetske mreže i postrojenja
PlaceOsijek
StateCroatia
Scientific field, discipline, subdisciplineTECHNICAL SCIENCES
Electrical Engineering
Power Engineering
Study programme typeuniversity
Study levelgraduate
Study programmeGraduate University Study Programme in Electrical Engineering; branch: Communications and Informatics, Power Engineering
Study specializationPower Engineering
Academic title abbreviationmag.ing.el.
Genremaster's thesis
Language Croatian
Defense date2015-10-07
Parallel abstract (English)
This paper describes the mechanisms of degradation models which are expressed using various quality parameters and the focus was on the degradation of the insulating paper. The second chapter describes the various methods of determining the reliability of the transformer, and calculating the remaining lifetime of the transformer. The most reliable way of determining the condition of the insulating paper is through the degree of polymerization, which is discussed in fourth chapter. The third section describes the concept of the degree of polymerization, and various methods for determining condition of the insulation (hot-spot temperature of transformer oil, taking samples of paper and determining the degree of polymerization, also a indirect method of determining the the degree of polymerization by determining furans in transformer oil processed and it was mentioned that the amount furans is a direct indicator of the degree of polymerization). The paper also shows that the use of multiple parallel-connected transformers increases the reliability of the system to which they are connected as one always serves as a backup. The fourth chapter gives realistic examples of determining the remaining lifetime of the transformer using the degree of polymerization and furan analysis, and the condition of the transformer system of Elektra Slavonski Brod was described.
Parallel keywords (Croatian)Pouzdanost stupanj polimerizacije furan analiza degradacija papira izolacijski papir
Resource typetext
Access conditionOpen access
Terms of usehttp://rightsstatements.org/vocab/InC/1.0/
URN:NBNhttps://urn.nsk.hr/urn:nbn:hr:200:242498
CommitterAnka Ovničević