Title :
Performance of generator protection relays during off-nominal frequency operation
Author :
Tierney, Dennis ; Kasztenny, Bogdan ; Finney, Dale ; Haas, Derrick ; Bin Le
Author_Institution :
Calpine Corp., USA
fDate :
March 31 2014-April 3 2014
Abstract :
This paper reviews the protection requirements for generators during periods of off-nominal frequency operation. It investigates the behavior of instrument transformers during these periods as well as the impact of frequency on the accuracy of protection operating quantities. Traditional methods for frequency tracking and compensation are reviewed. A novel approach, which provides excellent performance for very significant frequency deviations and can accommodate multiple frequency islands, is presented.
Keywords :
electric generators; instrument transformers; machine protection; relay protection; frequency tracking; generator protection relays; instrument transformers; multiple frequency island; off nominal frequency operation; protection operating quantity; Combustion; Frequency measurement; Generators; Relays; Stators; Switches; Turbines;
Conference_Titel :
Protective Relay Engineers, 2014 67th Annual Conference for
Conference_Location :
College Station, TX
Print_ISBN :
978-1-4799-4740-9
DOI :
10.1109/CPRE.2014.6799021
