Articles liés à Short Circuit Stress Analysis in Power Transformer...

Short Circuit Stress Analysis in Power Transformer Using FEM - Couverture souple

Ahmad, Ashfaq; Javed, Iqra

 
9783659529832: Short Circuit Stress Analysis in Power Transformer Using FEM
Couverture souple
ISBN 10 : 3659529834 ISBN 13 : 9783659529832
Editeur : LAP LAMBERT Academic Publishing, 2014

Synopsis

The objective of this work is to compute the mechanical stresses within transformer resulting from the excessive short-circuit currents. The forces and stresses set up in transformer windings and their clamping structures, as the result of external or internal short-circuits or of switching operations, are considered in detail. Various arrangements of windings in large power transformers are described. Points at which particularly high mechanical stresses occur in concentric windings are discussed in detail. Analytical and FEM (Finite Element Method) calculation for both types of short circuit forces, axial and radial have been discussed. The result was then compared with actual measurements on a prototype 20MVA 132 /11.5KV power transformer. Various failure mechanisms due to these forces have been elucidated. Axial forces between the top and bottom halves of each winding or between different windings are responsible for bending stresses in turns near the ends or adjacent to gaps in the windings, for compressive stresses in the body of the winding, and for tensile and compressive stresses in the clamping gear. Radial forces produce tensile stresses in the outer and buckling stress

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Présentation de l'éditeur

The objective of this work is to compute the mechanical stresses within transformer resulting from the excessive short-circuit currents. The forces and stresses set up in transformer windings and their clamping structures, as the result of external or internal short-circuits or of switching operations, are considered in detail. Various arrangements of windings in large power transformers are described. Points at which particularly high mechanical stresses occur in concentric windings are discussed in detail. Analytical and FEM (Finite Element Method) calculation for both types of short circuit forces, axial and radial have been discussed. The result was then compared with actual measurements on a prototype 20MVA 132 /11.5KV power transformer. Various failure mechanisms due to these forces have been elucidated. Axial forces between the top and bottom halves of each winding or between different windings are responsible for bending stresses in turns near the ends or adjacent to gaps in the windings, for compressive stresses in the body of the winding, and for tensile and compressive stresses in the clamping gear. Radial forces produce tensile stresses in the outer and buckling stress

Biographie de l'auteur

The author did his MS in Electronics and Communication with Specialization in Power Engineering and working as an Assistant Professor in Department Of Electronics, The University of Lahore, Pakistan. His research area and publications are in the field of Short Circuit Stress Analysis in Power Transformer.

Les informations fournies dans la section « A propos du livre » peuvent faire référence à une autre édition de ce titre.

Éditeur
LAP LAMBERT Academic Publishing
Date d'édition
2014
Langue
anglais
ISBN 10 
3659529834
ISBN 13 
9783659529832
Reliure
Broché
Nombre de pages
128
Coordonnées du fabricant
non disponible
Personne responsable
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