Characteristics Analysis of the Square Laminated Core under DC-biased Magnetization by the Fixed-point Harmonic-balanced FEM
Author(s)
Zhao, Xiaojun
Li, Lin
Lu, Junwei
Cheng, Zhiguang
Lu, Tiebing
Griffith University Author(s)
Year published
2011
Metadata
Show full item recordAbstract
The ferromagnetic core of power transformer is susceptible to DC bias and has special nonlinear and hysteretic characteristics under DC-biased magnetization. The DC bias test is carried out to obtain the DC-biasing magnetization curve of a square laminated core (SLC). The harmonic-balanced finite element method (HBFEM) is combined with the fixed-point technique to calculate the magnetic field in the laminated core under DC bias conditions by means of the measured DC-biasing magnetization curve. A locally convergent method in harmonic domain is presented to determine the fixed-point reluctivity, which can speed up the convergence ...
View more >The ferromagnetic core of power transformer is susceptible to DC bias and has special nonlinear and hysteretic characteristics under DC-biased magnetization. The DC bias test is carried out to obtain the DC-biasing magnetization curve of a square laminated core (SLC). The harmonic-balanced finite element method (HBFEM) is combined with the fixed-point technique to calculate the magnetic field in the laminated core under DC bias conditions by means of the measured DC-biasing magnetization curve. A locally convergent method in harmonic domain is presented to determine the fixed-point reluctivity, which can speed up the convergence of harmonic solution. Computation of DC-biasing magnetic field in SLC is performed by means of normal and DC-biasing magnetization curves respectively. Comparison between computed and calculated results indicates DC-biasing magnetization curve should be adopted in calculation of magnetic field under DC-biased magnetization.
View less >
View more >The ferromagnetic core of power transformer is susceptible to DC bias and has special nonlinear and hysteretic characteristics under DC-biased magnetization. The DC bias test is carried out to obtain the DC-biasing magnetization curve of a square laminated core (SLC). The harmonic-balanced finite element method (HBFEM) is combined with the fixed-point technique to calculate the magnetic field in the laminated core under DC bias conditions by means of the measured DC-biasing magnetization curve. A locally convergent method in harmonic domain is presented to determine the fixed-point reluctivity, which can speed up the convergence of harmonic solution. Computation of DC-biasing magnetic field in SLC is performed by means of normal and DC-biasing magnetization curves respectively. Comparison between computed and calculated results indicates DC-biasing magnetization curve should be adopted in calculation of magnetic field under DC-biased magnetization.
View less >
Conference Title
Proceedings of COMPUMAG2011
Subject
Electrical and Electronic Engineering not elsewhere classified