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Evaluation of eddy current losses in the cover plates of distribution transformers

DSpace at IIT Bombay

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Title Evaluation of eddy current losses in the cover plates of distribution transformers
 
Creator KULKARNI, S
OLIVARES, JC
ESCARELA-PEREZ, R
LAKHIANI, VK
TUROWSKI, J
 
Subject power transformers
 
Description The elimination of hot spots and the reduction of eddy current losses in bushing mounting plates is an important consideration in transformer design. The currently used bushing mounting plates are either mild steel plates, or mild steel plates with non-magnetic stainless steel inserts or stainless steel plates. The authors calculate the eddy current losses in bushing mounting plates using four different methods; (i) an analytical formulation; (ii) a three-dimensional finite element method (FEM); (iii) from measured values of the initial temperature rise; and (iv) from measured values of the steady-state temperature rise. There is a close agreement between the loss values obtained using these four methods. The analysis has resulted in a detailed understanding of the loss pattern and temperature rise phenomenon in bushing mounting plates. The authors also analyse tank plates of small pad-mounted distribution transformers. It is shown that judicious use of non-magnetic stainless steel can result in considerable energy savings for pad-mounted transformers. FEM simulations are performed to find out cost-effective materials for the tank plates of the pad-mounted transformers. A T-shaped stainless steel plate is found to significantly reduce the load loss. The results of the simulations have been verified on a 225 kVA pad-mounted transformer.
 
Publisher IEE-INST ELEC ENG
 
Date 2011-07-31T10:16:39Z
2011-12-26T12:52:57Z
2011-12-27T05:39:59Z
2011-07-31T10:16:39Z
2011-12-26T12:52:57Z
2011-12-27T05:39:59Z
2004
 
Type Article
 
Identifier IEE PROCEEDINGS-SCIENCE MEASUREMENT AND TECHNOLOGY, 151(5), 313-318
1350-2344
http://dx.doi.org/10.1049/ip-smt:20040632
http://dspace.library.iitb.ac.in/xmlui/handle/10054/8079
http://hdl.handle.net/10054/8079
 
Language en