Title :
Enhanced overcurrent algorithm for performance under CT saturation in industrial applications
Author :
Muthukrishnan, Vijay ; Sevov, Lubomir ; Voloh, Ilia
Author_Institution :
GE Multilin, Markham, ON
Abstract :
The computational capabilities of numerical relays allow the development of sophisticated overcurrent algorithms. These algorithms ensure dependable and fast operation of short circuit protection even under severe saturation of current transformers. This eliminates the need for impractical engineering of such applications, and increases confidence levels in cases with relatively well-rated CTs that do not experience extreme saturation but are exposed to currents much higher than the conventional 20 times rated.
Keywords :
current transformers; overcurrent protection; power transformer protection; relay protection; short-circuit currents; CT saturation; current transformers; numerical relays; overcurrent algorithm; short circuit protection; Art; Circuit faults; Circuit testing; Current transformers; Fault currents; Performance evaluation; Protection; Protective relaying; Relays; Switchgear;
Conference_Titel :
Protective Relay Engineers, 2009 62nd Annual Conference for
Conference_Location :
Austin, TX
Print_ISBN :
978-1-4244-4182-2
Electronic_ISBN :
978-1-4244-4183-9
DOI :
10.1109/CPRE.2009.4982529