prikaz prve stranice dokumenta Proračun prijelaznog povratnog napona na visokonaponskim SF6 prekidačima
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master's thesis
Proračun prijelaznog povratnog napona na visokonaponskim SF6 prekidačima
Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing, 2022. urn:nbn:hr:168:148729
Zečević, Božo
University of Zagreb
Faculty of Electrical Engineering and Computing

Institutional repository: FER Repository

Cite this document

Zečević, B. (2022). Proračun prijelaznog povratnog napona na visokonaponskim SF6 prekidačima (Master's thesis). Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing. Retrieved from https://urn.nsk.hr/urn:nbn:hr:168:148729

Zečević, Božo. "Proračun prijelaznog povratnog napona na visokonaponskim SF6 prekidačima." Master's thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, 2022. https://urn.nsk.hr/urn:nbn:hr:168:148729

Zečević, Božo. "Proračun prijelaznog povratnog napona na visokonaponskim SF6 prekidačima." Master's thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, 2022. https://urn.nsk.hr/urn:nbn:hr:168:148729

Zečević, B. (2022). 'Proračun prijelaznog povratnog napona na visokonaponskim SF6 prekidačima', Master's thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, accessed 23 June 2024, https://urn.nsk.hr/urn:nbn:hr:168:148729

Zečević B. Proračun prijelaznog povratnog napona na visokonaponskim SF6 prekidačima [Master's thesis]. Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing; 2022 [cited 2024 June 23] Available at: https://urn.nsk.hr/urn:nbn:hr:168:148729

B. Zečević, "Proračun prijelaznog povratnog napona na visokonaponskim SF6 prekidačima", Master's thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:168:148729

Metadata
TitleProračun prijelaznog povratnog napona na visokonaponskim SF6 prekidačima
Title (english)Calculation of transient recovery voltage on high voltage SF6 circuit breakers
AuthorBožo Zečević
MentorBožidar Filipović-Grčić (mentor)
Committee memberBožidar Filipović-Grčić (predsjednik povjerenstva)
Committee memberViktor Milardić (član povjerenstva)
Committee memberGoran Grdenić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Electrical Engineering and Computing
Zagreb
Defense date and country2022-07-13, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Electrical Engineering
Abstract
U ovom diplomskom radu proračunat je prijelazni povratni napon na prekidaču u prijenosnoj mreži napona 220 kV. Navedeni su standardi koje trebaju zadovoljiti prekidači smješteni na tom naponu i opisan je proces koji se odvija unutar samog prekidača za vrijeme odvajanja njegovih kontakata. Problem je prikazan na trofaznom modelu u programu EMTP. Provedena je simulacija i proračun za različita mjesta i udaljenosti jednofaznog kratkog spoja od prekidača, a naglasak je stavljen na bliski kratki spoj od udaljenosti do nekoliko kilometara jer je u praksi to najkritičniji kvar koji zbog male impedancije i brzine kojom prenaponski val putuje kroz mrežu za vrijeme kvara uzrokuje nastajanje povratnih napona najviših amplituda. Ovaj problem zatim je promatran za trofazni kratki spoj i za različite konfiguracije spojenih dalekovoda i kabela u prijenosnoj mreži. Trofazni kratki spoj je pokazan kao prevelika zadaća za prekidač od 245 kV i preporuča se korištenje prekidača od 300 kV za kvarove više od jedne faze. Različite lokacije kratkog spoja su simulirane, a zatim pripadne sheme i grafovi PPN-a su prikazani slikama. Za svaki jednofazni kratki spoj, oblik PPN-a je unutar svojih standardiziranih krivulja što dokazuje da je prekidač sposoban isključiti kvar bez ikakvih posljedica za sam prekidač.
Abstract (english)
In this thesis, transient recovery voltage on circuit breaker is calculated in 220 kV transmission network. Standards which circuit breaker connected on that voltage must satisfy are and the process which occurs inside circuit breaker during separating it's contacts is described. The problem is showed on three phase model in EMTP program. Simulation and calculation are done for different locations and distances of one phase short circuit ofcircuit breaker. Accent is put on short line fault on distance of couple kilometers because in practice it is the most critical fault which due to low impedance and speed of overvoltage wave is spreading through the network during fault, causes formation of transient recovery voltages with highest amplitudes. This problem then, is observed for three phase fault and for different configurations of connected transmission lines and cables in transmission network. Three phase short circuit is showed up as too big task for 245 kV circuit breaker and it is recommended to use 300 kV for more than single phase fault. Different locations of short circuit are simulated and then associated schemes and TRV graphs are shown on figures. For each single line fault, form of TRV is inside its standardized envelops what proves circuit breaker is capable to switch off the fault without any consequences for circuit breaker itself.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:168:148729
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 on2023-01-15 11:28:27