Proračun elektromagnetskog polja složenih elektroenergetskih objekata

doctoral thesis

• Title (english): Electromagnetic field calculation of complex power system facilities
• Author: Bojan Trkulja
• Mentor: Željko Štih (mentor)
• Committee member: Sead Berberović (predsjednik povjerenstva)
• Committee member: Željko Štih (član povjerenstva)
• Committee member: Livio Šušnjić (član povjerenstva)
• Committee member: Armin Pavić (član povjerenstva)
• Committee member: Ivo Uglešić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; (Department of Electrical Engineering Fundamentals and Measurements); Zagreb
• Defense date and country: 2008-07-11, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering; Power Engineering
• Universal decimal classification (UDC): 621.3 - Electrical engineering ; 53 - Physics

Abstract

Točan proračun niskofrekvencijskog kvazistatičkog elektromagnetskog polja značajan je za projektiranje naprava za prijenos i pretvorbu električne energije. U okviru ovog rada razrađena je teorijska podloga proračuna pomoću integralnih jednadžbi. Postupci rješavanja tih jednadžbi definirani su primjenom metode momenata i Galerkinove metode. Nepoznata raspodjela gustoće funkcije izvora na tankožičnim elementima je približena polinomima trećeg stupnja. Na pravokutnim i cilindričnim plohama približenje nepoznate funkcije izvora realizirano je bikubičnim elementima. Razvijen je program za paralelni proračun elektromagnetskog polja temeljen na opisanoj metodi. Usporedba pokazuje dobru podudarnost rezultata proračuna i mjerenja.

Abstract (english)

Computation of low-frequency quasistatic electromagnetic fields is important segment of projecting electric devices. In this paper, computation is based on integral-equation approach. System of equations is solved by the appliance of the method of moments and the Galerkin methods. The unknown distribution of the source is approximated by the third degree polynomial on the thin-wire elements. The unknown distribution of the source on rectangular and cylindrical surfaces is approximated by the bicubic elements. A parallel computer program is developed on the described theory. Comparison shows good agreement between results of the calculation and the measurements.

• Keywords: proračun elektromagnetskog polja; integralne jednadžbe; metoda momenata; Galerkinova metoda
• Keywords (english): calculation of electromagnetic fields; integral equations; method of moments; Galerkin methods
• Language: croatian
• URN:NBN: urn:nbn:hr:168:261087
• Study programme: Title: Doctoral study programme "Electrical Engineering and Computing"; Study programme type: university; Study level: postgraduate; Academic / professional title: doktor/doktorica znanosti, po-dručje tehničkih znanosti (doktor/doktorica znanosti, po-dručje tehničkih znanosti)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2020-05-21 14:13:17