Analysis of the DC bias phenomenon in transformers based on harmonic-balanced finite element method

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Title Analysis of the DC bias phenomenon in transformers based on harmonic-balanced finite element method
Author Xiao-jun, ZHAO; Lin, LI; Zhi-guang, CHENG; Lu, Junwei; Cui-ping, JIAO
Journal Name Proceedings of the Chinese Society of Electrical Engineering
Year Published 2010
Place of publication China
Publisher China Association for Science and Technology (CAST)
Abstract Abstract: In this paper the harmonic-balanced finite element method (HBFEM) was applied to study the DC bias phenomenon in power transformers. Variables in electric circuits and magnetic field were represented in harmonic forms duo to the periodic characteristic of electromagnetic field under steady-state excitation. The harmonic-balanced finite element equation was set up by means of the harmonic decomposition of magnetic reluctivity, considering the coupling of electric circuit and magnetic field. The harmonic solutions of exciting current and magnetic vector potentials were calculated directly to analyze the relationship between DC bias and DC flux. The local vortex characteristic of flux distribution in each harmonic was also presented. An Epstein frame-like core model was applied to carry out the DC bias experiment. A good agreement between calculated results and experimental data proves the effectiveness of HBFEM in the investigation of DC bias phenomenon.
Peer Reviewed Yes
Published Yes
Publisher URI
Volume 30
Issue Number 21
Page from 103
Page to 108
ISSN 0258-8013
Date Accessioned 2011-01-18
Date Available 2011-03-15T08:04:14Z
Language en_AU
Research Centre Centre for Wireless Monitoring and Applications; Queensland Micro and Nanotechnology Centre
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Electrical and Electronic Engineering
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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