Abstract
It is difficult to detect the faulty feeder if single phase-earth faults occur in a resonant grounding system, mainly due to its very low-current fault. Since the similarity of transient zero-sequence current waveforms between faulty feeder and sound feeder is lower than that between two sound feeders, this paper presents a protection scheme for faulty feeder detection based on the grey relation degree that can characterize the similarity among curves. Slope relation degree, one kind of grey relation degree, is chosen to characterize the similarity of transient zero-sequence current waveforms between one feeder and other feeders, and the slope relation matrix that represents the relationship among all feeders can be established. The protection criterion established by using the slope relation matrix can be applied to detect the faulty feeder of single phase-earth faults. It is noted that the proposed method is applicable to the system where at least three or more feeders are presented. Electromagnetic Transients Program (EMTP) simulation results and adaptability analysis have confirmed the effectiveness and reliability of the proposed scheme.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
