Analysis of the DC Bias Phenomenon by the Harmonic Balance Finite-Element Method

Author

Zhao, Xiaojun ; Lu, Junwei ; Li, Lin ; Cheng, Zhiguang ; Lu, Tiebing

Author_Institution

Sch. of Electr. & Electron. Eng., North China Electr. Power Univ., Baoding, China

Volume

26

Issue

1

fYear

2011

Firstpage

475

Lastpage

485

Abstract

An Epstein frame-like core model is set up to study the dc-biased problem of the power transformer. The harmonic phenomenon of the model under the dc bias condition is investigated by using the harmonic-balance finite-element method (HBFEM). The harmonic-balance finite element equation is coupled with the external electric circuit. Each harmonic component of the magnetizing current and magnetic field can be calculated directly in the harmonic frequency domains. Comparing the calculated results with the experimental data shows consistency. The dc bias effects on the magnetizing current and the magnetic induction are analyzed through the harmonic solutions.

Keywords

DC power transmission; electromagnetic induction; finite element analysis; power transformers; DC bias phenomenon; external electric circuit; harmonic balance finite-element method; magnetic induction; magnetizing current; power transformer; Harmonic analysis; Magnetic circuits; Magnetic cores; Magnetic domains; Mathematical model; Power transformers; Windings; DC bias; harmonic domain; harmonic-balance finite-element method (HBFEM); magnetic induction;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/TPWRD.2010.2056709

Filename

5673409