Original scientific paper

SKIN – EFFECT LOSSES IN DIFFERENT LOADING CONDITIONS OF A POWER TRANSFORMER

Franjo Kelemen orcid.org/0000-0002-5766-978X ; Končar Power Transformers Ltd.
Kosjenka Capuder ; Končar Power Transformers Ltd.
Leonardo Štrac orcid.org/0000-0002-6017-4622 ; Končar Power Transformers Ltd.

Abstract

The subject of the analysis is a 300 MVA auto-connected power transformer in different loading
conditions with regard to the load losses. During the electrical design time, some operating points of the
transformer were analyzed in more detail using 2D electromagnetic field finite element method (FEM)
software. The models included 2D magnetic stray field calculation and covered a range of transformer
loading cases that covered some that are more difficult to solve with traditional analytic methods based
on the static magnetic field calculations. This is due to the presence of a phase shift between the currents
through the windings. The results of the static magnetic Rabins’ method field calculation and the FEM
method are compared and the best practice method is defined and determined accordingly.

Keywords

Finite element method; load losses; phase shift; power transformer; skin – effect

Hrčak ID:

198947

URI

https://hrcak.srce.hr/198947

Publication date:

15.7.2017.

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