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A current-based solution for transformer differential protection. I. Problem statement

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4 Author(s)
Guzman, A. ; Schweitzer Eng. Labs., Pullman, WA, USA ; Zocholl, Z. ; Benmouyal, G. ; Altuve, H.J.

This paper analyzes the problem of transformer differential protection. First, the authors review the concept of transformer differential protection. They then analyze magnetizing inrush, overexcitation and current transformer (CT) saturation phenomena as possible causes of relay misoperation. Finally, they summarize the existing methods for discriminating internal faults from inrush and overexcitation conditions

Published in:

Power Delivery, IEEE Transactions on  (Volume:16 ,  Issue: 4 )

Date of Publication:

Oct 2001

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