Numerical Calculation Of Magnetic
Dissipation At Power Transformers
Author(s)
V. Madžarević, A. Muharemović, A. Nuhanović & H. Salkić
Abstract
The analysis of the power transformer electromagnetic dissipation has been
based on the analysis of electromagnetic process distribution in the stationary
regime. The finite element method was used in the area of the numerical
calculation of magnetic field. The 2D calculation of magnetic field distribution
in transformers was realized through the application of the FEM2D software.
From the numerical calculation of the magnetic field, the dissipating inductivity
is calculated through the application of the energy method and the linked fluxes
method. Based on the laboratory measures conducted on the model of a
low-voltage transformer, the values of the numerical calculation have been
provided. Results of the numerical calculation of the dissipating inductivities
were compared to the measured values obtained in the short circuit regime with
the application of very precise instrumentation. Some proportional deviations
were noted. Conducted analysis on the numerical calculation of magnetic
dissipation from the point of data accuracy, and complexity of the calculation
brings the energy method into first place. The acceptable results have also been
exercised with the linked fluxes method.
Keywords: magnetic dissipation, dissipating inductance, dissipating fluxes,
method of finite elements, method of flux linkage, energy method.
1 Introduction
The numerical methods of determining the magnetic dissipation for different
positions and shapes of windings and magnetic core are very often used by the
constructors in the transformers manufacture. Special attention during the
Keywords
magnetic dissipation, dissipating inductance, dissipating fluxes,
method of finite elements, method of flux linkage, energy method
Related Book
Other papers in this volume
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