NDLI: Fault discrimination and protection of power transformers using voltage and current signals

Content Provider	IEEE Xplore Digital Library
Author	Noah, M.S. Shaltout, A.A.
Copyright Year	2014
Description	Author affiliation: Shaker Consultancy Group, Cairo Univ., Cairo, Egypt (Noah, M.S.) \|\| Dept. of Electr. Power & Machines, Cairo Univ., Giza, Egypt (Shaltout, A.A.)
Abstract	Power transformer protective relay should block the tripping during magnetizing inrush, external faults and rapidly operates the tripping during internal faults and should be sensitive enough to detect minor winding faults. This paper presents an online, simple protection method based on instantaneous voltages and currents readings. It is possible to discriminate between internal and external faults, between switching on fault and inrush current by tracking the contour of calculated positive sequence admittance on the two transformer sides. Also, minor winding faults could be detected by constructing the voltage difference-input current (ΔV-I) locus diagram and comparing it with the healthy locus and providing alarming or tripping when unacceptable winding fault is occurring. The proposed protection technique has been studied and simulated using MATLAB/SIMULINK tool.
Sponsorship	IEEE Croatia Sect.
Starting Page	254
Ending Page	261
File Size	969924
Page Count	8
File Format	PDF
ISBN	9781479924493
DOI	10.1109/ENERGYCON.2014.6850437
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-05-13
Publisher Place	Croatia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Instantaneous voltage and current readings Magnetization inrush Windings Surge protection Transformer protection Admittance Power transformers Circuit faults Winding faults Surges Relays
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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