Temperature distribution in power transformer windings with NDOF and DOF cooling

Author

Taghikhani, M.A. ; Gholami, A.

fYear

2008

fDate

20-24 July 2008

Firstpage

1

Lastpage

9

Abstract

Power transformers represent the largest portion of capital investment in transmission and distribution substations. In addition, power transformer outages have a considerable economic impact on the operation of an electrical network. One of the most important parameters governing a transformerpsilas life expectancy is the hot-spot temperature (HST) value. The classical approach has been to consider the hot-spot temperature as the sum of the ambient temperature, the top-oil temperature rise in tank, and the hot-spot-to-top-oil (in tank) temperature gradient. In this paper energy (thermal) equation is solved until temperature is obtained. For numerical solution of above equation, finite element method is used. The selected model for simulation is 32MVA transformer with non-directed oil-forced (NDOF) cooling and directed oil-forced (DOF) cooling.

Keywords

finite element analysis; power transformers; temperature distribution; transformer windings; DOF cooling; NDOF; finite element method; hot-spot temperature; power transformer windings; temperature distribution; Cooling; Equations; Finite element methods; Investments; Oil insulation; Power generation economics; Power system economics; Power transformers; Substations; Temperature distribution; Finite element; Power transformer; Temperature distribution; Thermal equation;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century, 2008 IEEE

Conference_Location

Pittsburgh, PA

ISSN

1932-5517

Print_ISBN

978-1-4244-1905-0

Electronic_ISBN

1932-5517

Type

conf

DOI

10.1109/PES.2008.4596779

Filename

4596779