master's thesis
Analysis of the overvoltage impact on the operation of power transformers

Tomislav Šanje (2015)
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
Metadata
TitleAnaliza utjecaja prenapona na rad energetskih transformatora
AuthorTomislav Šanje
Mentor(s)Zoran Baus (thesis advisor)
Abstract
U radu je bilo potrebno analizirati utjecaj prenapona na energetski transformator, to jest, što se događa unutar transformatora kada na njega nailazi prenaponski val. Zbog svoje prirode, vrlo strmog čela vala, ali vrlo kratkog trajanja, prenaponi su specifični jer sadrže puno više frekvencije od standardnih napona prisutnih u transformatoru. Nakon upoznavanja pojave prenapona i njegovog utjecaja, bilo je potrebno prije same analize modelirati transformator. On je u ovom radu modeliran kapacitetom između namota i kapacitetom prema zemlji. Prenaponski val modelira je pravokutnim valom koja je u ovom slučaju relativno dobra aproksimacija događanja. Simulacija je rađena u Matlabu. Iz rezultata se vidi da prenaponski val puno više utječe na raspodjelu napona unutra transformatora kada je njegove zvjezdište neuzemljeno, jer praktički udvostručava napona unutar transformatora.
KeywordsPower transformer overvoltage atmospheric overvoltage capacity distribution voltage amplitude frequency
Parallel title (English)Analysis of the overvoltage impact on the operation of power transformers
Committee MembersZoran Baus (committee chairperson)
Srete Nikolovski (committee member)
Goran Knežević (committee member)
GranterJosip Juraj Strossmayer University of Osijek
Faculty of Electrical Engineering, Computer Science and Information Technology Osijek
Lower level organizational unitsDepartment of Power Engineering
Chair of Power Systems and Substations
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 date2015-10-06
Parallel abstract (English)
This work is necessary to analyze the impact of surges in power transformer, that is, what is happening inside the transformer when it encounters the overvoltage wave. Because of its nature, a very steep wave front, but very short duration, voltages are specific because they contain much higher frequency than the standard voltage present in the transformer. After getting to know the voltage spikes and its impact, it was necessary prior to the analysis model transformer. It is in this paper modeled a capacity between windings and capacity to ground. The surge wave modeled by rectangular wave which is in this case a relatively good approximation of events. The simulation was conducted in Matlab. The results show that the surge wave is affecting the distribution of power in the transformer when its star-unearthed, because virtually doubles the voltage inside the transformer
Parallel keywords (Croatian)Energetski transformator prenapon atmosferski prenapon kapacitet raspodjela napona amplituda frekvencija
Resource typetext
Access conditionOpen access
Terms of usehttp://rightsstatements.org/vocab/InC/1.0/
URN:NBNhttps://urn.nsk.hr/urn:nbn:hr:200:477957
CommitterAnka Ovničević