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master's thesis
Modeli transformatora za proračun prenesenih prenapona visokih frekvencija
Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing, 2017. urn:nbn:hr:168:789498
Bučar, Luka
University of Zagreb
Faculty of Electrical Engineering and Computing

Institutional repository: FER Repository

Cite this document

Bučar, L. (2017). Modeli transformatora za proračun prenesenih prenapona visokih frekvencija (Master's thesis). Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing. Retrieved from https://urn.nsk.hr/urn:nbn:hr:168:789498

Bučar, Luka. "Modeli transformatora za proračun prenesenih prenapona visokih frekvencija." Master's thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, 2017. https://urn.nsk.hr/urn:nbn:hr:168:789498

Bučar, Luka. "Modeli transformatora za proračun prenesenih prenapona visokih frekvencija." Master's thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, 2017. https://urn.nsk.hr/urn:nbn:hr:168:789498

Bučar, L. (2017). 'Modeli transformatora za proračun prenesenih prenapona visokih frekvencija', Master's thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, accessed 17 June 2024, https://urn.nsk.hr/urn:nbn:hr:168:789498

Bučar L. Modeli transformatora za proračun prenesenih prenapona visokih frekvencija [Master's thesis]. Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing; 2017 [cited 2024 June 17] Available at: https://urn.nsk.hr/urn:nbn:hr:168:789498

L. Bučar, "Modeli transformatora za proračun prenesenih prenapona visokih frekvencija", Master's thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, 2017. Available at: https://urn.nsk.hr/urn:nbn:hr:168:789498

Metadata
TitleModeli transformatora za proračun prenesenih prenapona visokih frekvencija
Title (english)Transformer models for calculation of high frequency transmitted over-voltages
AuthorLuka Bučar
MentorIvo Uglešić (mentor)
Committee memberIvo Uglešić (predsjednik povjerenstva)
Committee memberIvica Pavić (član povjerenstva)
Committee memberBoško Milešević (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Electrical Engineering and Computing
Zagreb
Defense date and country2017-07-17, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Electrical Engineering
Abstract
Ovim radom razmotreni su utjecaji prenapona visokih frekvencija prouzrokovanih atmosferskim izbijanjima i operacijom vakuumskih rastavljača. U takvim uvjetima transformatorski RLCG parametri se ponašaju drugačije što navodi na potrebu prilagodbe modela za visokofrekvencijske uvjete. Zbog ograničenosti manjkom detalja o unutarnjoj geometriji transformatora modeliranje se provodi modelom „sive kutije“ koja se temelji na metodi konačnih elemenata. Cilj je takvim modelom odrediti raspodjelu napona u namotu. U Matlabu se postavljaju ulazni parametri geometrije transformatorskog prozora i broja segmenata. Zatim se u FEMM-u provodi crtanje geometrije, elektrostatski i magnetski proračun, te proračun R, L i C parametra. Nakon čega se ponovno u Matlabu vrši proračun G parametra i izračun matrica vodljivosti vanjskih i unutarnjih čvorišta. U EMTP-RV-u se računaju konačne jednadžbe stanja. Kako prvi dio rada pojašnjava teorijsku pozadinu i cilj takve simulacije, drugi dio rada usredotočen je na detalje simuliranog modela, dimenzije transformatorskog namota koja je dostupna i testne scenarije čiji rezultati se naposljetku uspoređuju CIGRE-nim rezultatima testiranog modela.
Abstract (english)
This document will explain the effects of high frequency overvoltages caused by atmospheric discharge and switching operations with vacuum circuit breaker. In such conditions transformer RLCG parameters behave differently, suggesting the need to adapt the model for high frequency conditions. Due to limited detail on transformer interior geometry, modeling is carried out using „grey box“ model based on finite element method. The goal is to determine the voltage distribution in the winding. The Matlab is used to set the input parameters of the geometry of the transformer window and the number of segments. Then, in FEMM, geometry was drawn, electrostatic and magnetic calculation, and calculation of R, L and C parameters are performed. After that, Matlab is used to calculate the G parameter and calculate the matrix of conductivity of the external and internal nodes. EMTP-RV calculates the finite equations of the state. As the first part of this paper clarified the theoretical background and purpose of such simulation, the second part of the paper focuses on the details of the simulated model, available transformer winding dimensions and the test scenarios whose results are ultimately compared to CIGRE results of the tested model.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:168:789498
Study programmeTitle: 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 resourceText
File originBorn digital
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Created on2019-03-13 19:24:05