Title :
Experience with 100% stator ground fault protection schemes
Author :
Mozina, Charles J.
Author_Institution :
Consultant with Beckwith Electr. Co., Largo, FL
Abstract :
This paper discusses the experiences of several users with the application of three different 100% stator ground fault protection schemes. Two third-harmonic methods and a low frequency-injection method are included. This paper explains situations in which third-harmonic schemes work, and also the limitations of these schemes, which are not well understood by many relay engineers. It also discusses the use of a low-frequency injection scheme along with its limitations.
Keywords :
electric generators; fault diagnosis; harmonic analysis; power generation protection; relay protection; generator protection; low frequency-injection method; relay engineers; stator ground fault protection schemes; two third-harmonic methods; Circuit faults; Digital relays; Fault location; Frequency; Grounding; Protection; Protective relaying; Stator windings; Tellurium; Voltage measurement; Generator; Generator Protection; Low-Frequency Injection; Multifunction Digital Relay; Stator Ground Fault; Third-Harmonic Method;
Conference_Titel :
Transmission and Distribution Conference and Exposition, 2008. T&D. IEEE/PES
Conference_Location :
Chicago, IL
Print_ISBN :
978-1-4244-1903-6
Electronic_ISBN :
978-1-4244-1904-3
DOI :
10.1109/TDC.2008.4517122
