Buckling Strength Analysis of Large Power Transformer Windings Subjected to Electromagnetic Force Under Short Circuit

The inner winding of a power transformer is subjected to radial electromagnetic forces under short circuit conditions. When these forces exceed a certain limit, transformer windings buckle. This paper deals with the buckling strength analysis of transformer windings, including the evaluation of the...

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Bibliographic Details
Published inIEEE transactions on power apparatus and systems Vol. PAS-99; no. 3; pp. 1288 - 1297
Main Authors Kojima, Hiroyuki, Miyata, Hiroshi, Shida, Shigeru, Okuyama, Ken'ichi
Format Journal Article
LanguageEnglish
Published IEEE 01.05.1980
Subjects
Cause effect analysis
Circuit testing
Electromagnetic analysis
Electromagnetic forces
Finite element methods
Plastics
Power transformer insulation
Power transformers
Steel
Windings
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Summary:The inner winding of a power transformer is subjected to radial electromagnetic forces under short circuit conditions. When these forces exceed a certain limit, transformer windings buckle. This paper deals with the buckling strength analysis of transformer windings, including the evaluation of the bending stiffness of a winding disk (coil) of multiple turn laminated construction, the effect of supporting spacers on the deformation of a winding and the plastic deformation of a winding caused by circumferential stress.
ISSN:0018-9510
2995-6323
DOI:10.1109/TPAS.1980.319761