Distribution transformer cooling system improvement by innovative tank panel geometries

Author

Amoiralis, Eleftherios I. ; Tsili, Marina A. ; Kladas, Antonios G. ; Souflaris, Athanassios T.

Author_Institution

Fac. of Electr. & Comput. Eng., Nat. Tech. Univ. of Athens, Athens, Greece

Volume

19

Issue

3

fYear

2012

fDate

6/1/2012 12:00:00 AM

Firstpage

1021

Lastpage

1028

Abstract

Increase of temperature rise and hot spot values affects dramatically transformer aging and life expectancy. The present article investigates several improved designs of ONAN transformer cooling system by means of advanced numerical heat transfer-fluid flow model. Novel tank designs are examined in conjunction with other crucial parameters, as the number and location of the winding cooling ducts, so as to define the best geometry that ensures maximum efficiency of the transformer cooling system, with the aim of expanding transformer lifetime.

Keywords

ageing; cooling; flow; power transformers; transformer windings; ONAN transformer cooling system; distribution transformer cooling system; heat transfer-fluid flow; hot spot values; innovative tank panel geometries; life expectancy; temperature rise; transformer aging; transformer lifetime; winding cooling ducts; Cooling; Ducts; Geometry; Oil insulation; Power transformer insulation; Windings; Distribution transformers; cooling; finite element methods; fluid flow; hydrodynamics; insulation Life;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/TDEI.2012.6215108

Filename

6215108