NDLI: Studying effect of location and resistance of inter-turn faults on fault current in power transformers

Content Provider	IEEE Xplore Digital Library
Author	Zhalefar, F. Sanaye-Pasand, M.
Copyright Year	2007
Description	Author affiliation: Univ. of Tehran, Tehran (Zhalefar, F.; Sanaye-Pasand, M.)
Abstract	Inter-turn (turn-to-turn) fault is one of the most important failures which could occur in power transformers. This phenomenon could seriously reduce the useful life length of transformers. Meanwhile, transformer protection schemes such as differential relays are not able to detect this kind of fault. This type of fault should be studied carefully to determine its features and characteristics. In this paper the effect of fault location and fault resistance on the amplitude of fault current is studied. It is found that change of fault location along the winding has considerable effect on fault current amplitude. It would also be shown that, even small fault resistance could have major effect on fault current amplitude. In this paper, a real 240/11 kV, 27 MVA transformer is used for simulation studies.
Starting Page	138
Ending Page	142
File Size	2100820
Page Count	5
File Format	PDF
ISBN	9781905593361
DOI	10.1109/UPEC.2007.4468934
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-09-04
Publisher Place	UK
Access Restriction	Subscribed
Rights Holder	UPEC
Subject Keyword	Fault resistance Fault detection Power system simulation Protective relaying Inter-turn fault Fault location Power transformers Circuit faults Protection Surges Fault currents Power transformer insulation
Content Type	Text
Resource Type	Article

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