Title :
Temperature distribution in power transformer windings with NDOF and DOF cooling
Author :
Taghikhani, M.A. ; Gholami, A.
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;
Conference_Titel :
Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century, 2008 IEEE
Conference_Location :
Pittsburgh, PA
Print_ISBN :
978-1-4244-1905-0
Electronic_ISBN :
1932-5517
DOI :
10.1109/PES.2008.4596779
