Title :
Power Transformer Characteristics and Their Effects on Protective Relays
Author :
Mekic, Fahrudin ; Girgis, Ramsis ; Gajic, Zoran ; Nyenhuis, Edte
Author_Institution :
ABB Inc., Allentown, PA
Abstract :
There are a variety of protective relays using different measuring techniques to provide reliable and secure transformer protection. This includes electro-mechanical, solid state and numerical relays. Within each group, various algorithms exist. Advancements made to transformer technology and design over the past 3 decades, have changed the characteristics of the transformer inrush current, and have often introduced incorrect operations in the existing harmonic restraint relays during energization
Keywords :
power transformer protection; relay protection; electro-mechanical relays; harmonic restraint relays; numerical relays; power transformer characteristics; protective relays; solid state relays; transformer inrush current; Circuit faults; Equations; Impedance; Inductance; Power measurement; Power transformers; Protective relaying; Relays; Surge protection; Transformer cores;
Conference_Titel :
Protective Relay Engineers, 2007. 60th Annual Conference for
Conference_Location :
College Station, TX
Print_ISBN :
1-4244-0994-2
Electronic_ISBN :
1-4244-0995-0
DOI :
10.1109/CPRE.2007.359916
