Frequency Response Modeling of Transformer Windings Utilizing the Equivalent Parameters of a Laminated Core

Konstanty Marek Gawrylczyk and Katarzyna Trela
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Konstanty Marek Gawrylczyk: West Pomeranian University of Technology in Szczecin, Sikorskiego 37, 70-310 Szczecin, Poland
Katarzyna Trela: West Pomeranian University of Technology in Szczecin, Sikorskiego 37, 70-310 Szczecin, Poland

Energies, 2019, vol. 12, issue 12, 1-14

Abstract: The aim of the article is to present the method for modeling transformer winding inductance, taking into account the complex magnetic permeability and equivalent electric conductivity of the magnetic core. In the first stage of the research, a physical model of a 24-turn coil wound on the distribution transformer core was prepared. The Frequency Response Analysis (FRA) measurements of the coil were taken; then, the inductance of the coil as a function of frequency was calculated from the received frequency response curves. In the second stage, two-dimensional (2D) and three-dimensional (3D) computer models of the coil based on the finite element method (FEM) were established. In order to obtain the equivalent inductance characteristics of the winding modeled in 2D and 3D in a wide frequency range, the equality of the reluctance of the limbs and yokes in both models was assured. In the next stage of the research, utilization of the equivalent properties for the laminated magnetic material simulations was proposed. This outcome can be used to calculate the frequency response of the winding of the power transformer. The other obtained result is the method for modeling the resonance slope, which is visible on the inductance curve received from the FRA measurement.

Keywords: transformer windings; Frequency Response Analysis (FRA); frequency-dependent parameters; equivalent conductivity; core lamination (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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