Computation of Parameters of Power Transformer Windings for Use in Frequency Response Analysis
Journal article, 2007

We present a 3-D model for calculating magnetic fields in a power transformer and the effective parameters (inductance and resistance)of its windings. The transformer is representative of large transformers with power ratings ranging from hundreds of kilovolt amperes to hundreds of megavolt amperes. The model accounts for anisotropic frequency-dependent properties of the laminated transformercore and eddy currents in the steel sheets. We discuss the results of the calculations performed in the frequency range 10 Hz–10 MHz, and show that the largest variations of both the magnetic field and parameters of the windings take place at frequencies below 10 kHz and, at frequencies higher than 1 MHz, the magnetic core does not significantly affect the variation of the effective parameters.

laminated magnetic

finite-element method

Cross-sectional eddy current

high frequency

frequency-dependent parameters

Author

Nilanga Abeywickrama

Chalmers, Materials and Manufacturing Technology, High Voltage Engineering

Alexander Podoltsev

Institute of Electrodynamics of the National Academy of Sciences of Ukraine

Yuriy Serdyuk

Chalmers, Materials and Manufacturing Technology, High Voltage Engineering

Stanislaw Gubanski

Chalmers, Materials and Manufacturing Technology, High Voltage Engineering

IEEE Transactions on Magnetics

0018-9464 (ISSN)

Vol. 43 5 1983-1990

Subject Categories

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1109/TMAG.2007.891672

More information

Created

10/7/2017