Title :
Calculation of Eddy Current Field in the Ascending Flange for the Bushings and Tank Wall of a Large Power Transformer
Author :
Ho, S.L. ; Li, Y. ; Tang, R.Y. ; Cheng, K.W.E. ; Yang, S.Y.
Author_Institution :
Dept. of Electr. Eng., Hong Kong Polytech. Univ., Hong Kong
fDate :
6/1/2008 12:00:00 AM
Abstract :
The 3-D open boundary eddy current field induced by heavy current flowing in the coils and winding leads in large power transformers is calculated. The eddy current loss and local overheating problem in the tank wall and in the ascending flange of bushings are analyzed and reported in this paper. The effectiveness of a magnetic bypass plate near the coil ends for reducing the eddy current loss and local overheating in the clamp plates is discussed.
Keywords :
bushings; coils; eddy current losses; flanges; power transformers; transformer windings; 3-D open boundary eddy current field; ascending flange; bushings; clamp plates; coils; eddy current loss; local overheating; magnetic bypass plate; power transformers; tank wall; winding; Eddy current field; loss; power transformer;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2007.914858
