Proračun sila na namote transformatora u kratkom spoju

undergraduate thesis

• Title (english): Calculation of forces on transformer windings under a short circuit
• Author: Antonela Milina
• Mentor: Lana Virag (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2025-02-25, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; General Mechanical Engineering (Construction)

Abstract

U ovom radu predmet istraživanja su elektromagnetske sile generirane tijekom kratkog spoja koje uzrokuju značajna mehanička naprezanja u niskonaponskim i visokonaponskim namotima transformatora. Takve sile predstavljaju ključni izazov za sigurnost i trajnost transformatora, stoga njihovo istraživanje ima važnu ulogu u industriji i znanstvenim istraživanjima.
Analizirana je relevantna literatura vezana za pojavu kratkog spoja i njegovom utjecaju na rad transformatora. Primjenjen je analitički model za izračun elektromagnetskih sila na namote odabranog tipa transformatora. Istovremeno je izrađen numerički model temeljen na metodi konačnih elemenata (MKE) za precizan izračun mehaničkih naprezanja. Dobiveni rezultati analitičkog i numeričkog proračuna uspoređeni su kako bi se ocijenila njihova usklađenost i potvrdila valjanost korištenih metoda.

Abstract (english)

In this paper, the subject of research is the electromagnetic forces generated during a short circuit, which cause significant mechanical stress in the low-voltage and high-voltage windings of transformers. Such forces represent a key challenge for the safety and durability of transformers, making their investigation crucial in both industry and scientific research.

Relevant literature on the occurrence of short circuits and their impact on transformer operation has been analyzed. An analytical model is used to calculate the electromagnetic forces on the windings of a selected type of transformer. Simultaneously, a numerical model based on the Finite Element Method (FEM) was created to precisely calculate mechanical stress. The results of the analytical and numerical calculations were compared to evaluate their consistency and confirm the validity of the applied methods.

• Keywords: kratki spoj; sile na namotima; transformator; metoda konačnih elemenata (MKE); analitički proračun
• Keywords (english): short circuit; forces on the windings; transformer; finite element method (FEM); analytical calculation
• Language: croatian
• URN:NBN: urn:nbn:hr:235:263681
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2025-02-21 17:28:18