Title :
Speed of line protection - can we break free of phasor limitations?
Author :
Schweitzer, Edmund O. ; Kasztenny, Bogdan ; Guzman, Armando ; Skendzic, Veselin ; Mynam, Mangapathirao V.
Author_Institution :
Schweitzer Eng. Labs., Inc., Pullman, WA, USA
fDate :
March 30 2015-April 2 2015
Abstract :
Today´s relays are predominantly based on phasors, and as such, they incur a delay associated with the full-cycle observation window required for accurate phasor estimation. Considerable improvement in speed is possible by using information in the transients of voltages and currents. We review a number of protection techniques, including directional elements, direct tripping underreaching elements, and differential elements that significantly speed up line protection.
Keywords :
power system protection; power system relaying; power system transients; current transients; differential elements; direct tripping underreaching elements; directional elements; full-cycle observation window; line protection; phasor estimation; phasor limitations; relays; voltage transients; Band-pass filters; Circuit faults; Frequency measurement; Relays; Transient analysis;
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.2015.7102184
