Title :
A nondifferential protection scheme for generator stator windings
Author :
Bo, Z.Q. ; Chen, Z. ; Redfern, M.A. ; Potts, S. ; McCormick, M. ; Weller, G.
Author_Institution :
ALSTOM T&D Protection & Control Ltd., Stafford, UK
fDate :
1/1/2001 12:00:00 AM
Abstract :
This letter presents a new technique for generator protection. The fault-generated transient current signals are detected using a multichannel transient detection unit, then the spectral energies at different frequency bands are extracted and compared to discriminate between internal and external faults. Simulation results show that the scheme demonstrates good sensitivity to low-level and interturn faults
Keywords :
electric generators; electrical faults; machine protection; stators; transient analysis; external faults; fault-generated transient current signals; frequency bands; generator stator windings; internal faults; interturn faults; low-level faults; multichannel transient detection unit; nondifferential protection scheme; spectral energies; Circuit faults; Current transformers; Electrical fault detection; Fault detection; Frequency; Impedance; Power system transients; Protection; Protective relaying; Stator windings;
Journal_Title :
Power Engineering Review, IEEE
