Leakage Inductances of Transformers at Arbitrarily Located Windings

Marcin Jaraczewski and Tadeusz Sobczyk
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Marcin Jaraczewski: Faculty of Electrical and Computer Engineering, Cracow University of Technology, 24 Warszawska Street, PL 31-155 Cracow, Poland
Tadeusz Sobczyk: Faculty of Electrical and Computer Engineering, Cracow University of Technology, 24 Warszawska Street, PL 31-155 Cracow, Poland

Energies, 2020, vol. 13, issue 23, 1-20

Abstract: The article presents the calculation of the leakage inductance in power transformers. As a rule, the leakage flux in the transformer window is represented by the short-circuit inductance, which affects the short-circuit voltage, and this is a very important factor for power transformers. This inductance reflects the typical windings of power transformers well, but is insufficient for special transformers or in any case of the internal asymmetry of windings. This paper presents a methodology for calculations of the self- and mutual-leakage inductances for windings arbitrarily located in the air window. It is based on the 2D approach for analyzing the stray field in the air zone only, using discrete partial differential operators. That methodology is verified with the finite element method tested on real transformer data.

Keywords: power transformers; winding asymmetry; 2D stray field analysis; 2D discrete partial differential operators; energy-based approach; leakage inductances (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: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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