Proračun tranzijentne struje kratkog spoja sinkronog stroja s permanentnim magnetima korištenjem mapa ulančenih tokova

master's thesis

• Title (english): Determination of Transient Short-Circuit Current of PM Synchronous Machines via Flux-linkage maps
• Author: Kristijan Gaži
• Mentor: Stjepan Stipetić (mentor)
• Committee member: Stjepan Stipetić (predsjednik povjerenstva)
• Committee member: Damir Žarko (član povjerenstva)
• Committee member: Zlatko Hanić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2024-07-11, Croatia

Abstract

U diplomskom radu analiziran je tranzijent struja i ulančenih tokova tijekom tropolnog kratkog spoja. Tranzijent je određen na tri načina: FEM simulacija, Eulerova analitička metoda u Matlabu i blokovska shema u Simulinku. Rezultati svih triju metoda su jednaki te je moguće usporediti prednosti i mane svake metode. FEM simulacija traje nekoliko sati, dok su ostale dvije trajanja nekoliko sekundi. No, za analitičke metode potrebno je poznavanje mapa ulančenih tokova. Dodatno, u radu je objašnjena metoda sekante za pronalazak krajnje točke demagnetizacije. To je radna točka nakon koje će se, u negativnom smjeru d-osi, magneti na rotoru demagnetizirati. Cijeli proračun je kodiran u Matlabu te je u prvom poglavlju dan pregled funkcija.

Abstract (english)

The thesis analyzed transient currents and flux-linkages during a three-pole short circuit. The transient is determined in three ways: FEM simulation, Euler's analytical method in Matlab and block diagram in Simulink. The results of all three methods are equal, and it is possible to compare the advantages and disadvantages of each method. The FEM simulation lasts several hours, while the other two last for a few seconds. However, analytical methods require prepared flux-linkage maps. Additionally, the paper explains the secant method for finding the end point of demagnetization. This is the operating point after which, in the negative d-axis direction, the magnets on the rotor will demagnetize. The entire procedure is coded in Matlab, and in the first chapter an overview of the functions is given.

• Keywords: kratki spoj; sinkroni stroj s permanentnim magnetima; mape ulančenih tokova; tranzijent kratkog spoja; inverzne mape; metoda sekante; demagnetizacija
• Keywords (english): short circuit; synchronous machines with permanent magnets; flux-linkage maps; short-circuit transient; inverse maps; secant method; demagnetisation
• Language: croatian
• URN:NBN: urn:nbn:hr:168:903808
• Study programme: Title: 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 resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2024-10-12 20:38:30