Title :
A current-based solution for transformer differential protection. I. Problem statement
Author :
Guzmán, Armando ; Zocholl, Stan ; Benmouyal, Gabriel ; Altuve, Héctor J.
Author_Institution :
Schweitzer Eng. Labs., Pullman, WA, USA
fDate :
10/1/2001 12:00:00 AM
Abstract :
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
Keywords :
current transformers; magnetisation; power system faults; power system protection; power system relaying; power transformer protection; relay protection; current transformer saturation; current-based transformer differential protection; inrush conditions; internal faults discrimination; magnetizing inrush; overexcitation conditions; problem statement; relay misoperation; Circuit faults; Current transformers; Magnetic analysis; Magnetic flux; Power system harmonics; Power system protection; Power transformers; Protective relaying; Relays; Surge protection;
Journal_Title :
Power Delivery, IEEE Transactions on
