Title :
CT saturation tolerance for 87L applications
Author :
Zhihan Xu ; Proctor, Matt ; Voloh, Ilia ; Lara, Mike
Author_Institution :
Digital Energy, Gen. Electr., Markham, ON, Canada
fDate :
March 30 2015-April 2 2015
Abstract :
This paper is exploring requirements for the line current differential function (87L) with regards to the tolerance to current transformer (CT) saturation. Typically, requirements provided by the manufacturers or standards are to eliminate CT saturation completely by proper sizing of CTs, which is not always practical.
Keywords :
current transformers; differential transformers; fault diagnosis; mathematical analysis; relays; reliability; 87L application; AC saturation; CT circuit model; CT saturation tolerance; DC saturation; breaker-and-a-half-ring configuration; current transformer; differential relay security; line current differential function; mathematical deduction; reliability; Circuit faults; Current transformers; Fault currents; Instrument transformers; Integrated circuit modeling; Mathematical model; Windings; CT Saturation Tolerance; Line Current Differential Relay;
Conference_Titel :
Protective Relay Engineers, 2015 68th Annual Conference for
Conference_Location :
College Station, TX
Print_ISBN :
978-1-4799-8721-4
DOI :
10.1109/CPRE.2015.7102202
