Hybrid Analytical-FEM Approach for Power Transformer Transient Analysis

Bruno Jurišić; Zvonimir Jurković; Tomislav Župan; Mladen Marković

doi:10.37798/2024731512

Authors

Bruno Jurišić KONČAR - Electrical Engineering Institute Ltd.
Zvonimir Jurković KONČAR - Electrical Engineering Institute Ltd.
Tomislav Župan KONČAR - Electrical Engineering Institute Ltd.
Mladen Marković KONČAR – Distribution and Special Transformers Inc.

DOI:

https://doi.org/10.37798/2024731512

Keywords:

transformer, transients, high-frequency model, inductance, capacitance

Abstract

The paper describes a high-frequency model for transient calculation in transformer windings with segmentation on a turn level. The windings are represented by lumped RLC parameters given by the analytical approach, whereas the model is solved in the time domain. The accuracy of the analytical calculation is improved with correction factors obtained with a set of numerical calculations. The presented model is verified by measurements on the example of power transformer disc winding.