Model trofaznog trostupnog transformatora s histerezom

master's thesis

• Title (english): Three-phase three-leg transformer model with hysteresis
• Author: Fran Topol
• 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: 2020-07-07, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

U radu su opisana osnovna načela rada transformatora uz detaljna objašnjenja efekata histereze na rad transformatora. Opisane su različite topologije trofaznih trostupnih transformatora te prisutne magnetske prilike. Za modeliranje u Matlab-u korištene su elektična i magnetska nadomjesna shema koje međusobno interagiraju na osnovi fizikalnih načela prisutnih u transformatorima. Za modeliranje fizikalnog kruga korištena je Matlab/Simscape okolina, dok su matematičke funckije i međusobne veze između dviju domena ostvarene upotrebom Matlab/Simulink okruženja. Rezultati simulacija su potvrđeni s rezultatima iz akademskih članaka. Razvijena je nova metoda proračuna gubitaka u praznom hodu i nazivnom teretu iz električnih veličina novorazvijenog modela. Model je testiran u uvjetima nesimetrije napajanja i tereta kako bi se procjenili dodatni gubici generirani u jezgri i namotima transformatora.

Abstract (english)

New time domain model with included hysteresis effects is developed for a three-phase three-leg transformer. Based on transformer principles, electric and magnetic circuit is modeled in different physical domains in Matlab/Simscape environment. Mathematical expressions are accomplished in Matlab/Simulink environment. The model includes core asymmetry in each core leg and hysteresis nonlinearities for three-leg core structures. A new approach to the calculation of losses in the open-circuit test and normal operation is developed and presented.
Through direct evaluation of losses from electric circuit magnitudes, additional losses of the iron core and windings can be estimated for different power system imbalances and distortion conditions.

• Keywords: model transformatora; histereza; trofazni trostupni transformator; magnetski krug; električni krug; proračun gubitaka; komponente gubitaka; Matlab/Simulink; Matlab/Simscape; PSpice
• Keywords (english): three-phase transformer model; hysteresis; core representation; equivalent electric circuit; equivalent magnetic circuit; losses calculation; Matlab modeling; PSpice modeling
• Language: english
• URN:NBN: urn:nbn:hr:168:848071
• 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: 2023-01-13 14:04:28