NDLI: Internal winding failure due to resonance overvoltage in distribution transformer caused by winter lightning

Content Provider	IEEE Xplore Digital Library
Author	Hori, M. Nishioka, M. Ikeda, Y. Noguchi, K. Kajimura, K. Motoyama, H. Kawamura, T.
Copyright Year	1986
Abstract	In this paper, we describe the internal winding failures of the no. 3 distribution transformer at Katayamazu substation caused by winter lightning. Almost the same internal winding part of the transformer was damaged in January 1997 and November 2001. Therefore, detailed investigations of the cause of failures were carried out. From the investigations on the measurement of the frequency characteristics of transformer windings and detailed lightning surge analysis used by Electromagnetic Transients Program (EMTP), it was found that resonance overvoltages were generated by resonance phenomena between the surge waveform passing through the transformer and the natural frequency characteristics of the transformer winding. This finding was used to improve the winding form of tap windings and install a surge protection device between tap windings. After the improvement of winding structures, it was clearly shown that the internal stress of tap windings was reduced and the breakdown probability of the damaged part was significantly reduced.
Sponsorship	IEEE Power Engineering Society
Starting Page	1600
Ending Page	1606
Page Count	7
File Size	287623
File Format	PDF
ISSN	08858977
Volume Number	21
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Resonance Voltage control Lightning Surge protection Windings Surges EMTP Substations Frequency measurement Electromagnetic measurements winter lightning Breakdown probability natural frequency resonance overvoltage surge protection device tap winding transformer winding form
Content Type	Text
Resource Type	Article
Subject	Energy Engineering and Power Technology Electrical and Electronic Engineering

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