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Resultant magnetic fields due to both windings and heavy current leads in large power transformers

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4 Author(s)
Tang Renyuan ; Shenyang Polytech. Univ., China ; Li Yan ; Lin Feng ; Tian Lijian

The eddy current field due to both windings and heavy current leads (HCL) in large power transformers is analyzed by using the improved T-Ω method, in which T and Ω can be solved separately in different subregions. Thus, storage capacity and CPU time can be saved to a great extent. In addition, the local overheating on the tank wall near the magnetic shield gap is calculated and analyzed, and improvement measures are proposed. On the basis of this work, a composite shield is analyzed and optimized. The numerical results show that the eddy current losses are reduced and the local overheating is removed by using this composite shield

Published in:

Magnetics, IEEE Transactions on  (Volume:32 ,  Issue: 3 )

Date of Publication:

May 1996

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