NDLI: Influence of DC prestress on impulse breakdown strength of insulating paper-liquid nitrogen composite system

Content Provider	IEEE Xplore Digital Library
Author	Kawashima, T. Kurimoto, M. Murakami, Y. Nagao, M. Inagaki, Y. Ashibe, Y. Hirota, H.
Copyright Year	2012
Description	Author affiliation: Toyohashi University of Technology, Toyohashi, Aichi, Japan (Kawashima, T.; Kurimoto, M.; Murakami, Y.; Nagao, M.) \|\| Sumitomo Electric Industries, Ltd., Konohana-ku, Osaka, Japan (Inagaki, Y.; Ashibe, Y.; Hirota, H.)
Abstract	Breakdown characteristics of PPLP (Polypropylene laminated paper)® impregnated in liquid nitrogen (LN2) are presented. PPLP has three-laminated structure of kraft paper (KP), polypropylene film (PP film) and KP and has been used as an electrical insulating material in high-temperature superconducting cables. In this report, we investigated the influence of DC prestress on impulse breakdown strength of KP, PP film and PPLP in LN2. We performed DC prestress test in which DC voltage of 10 kV was applied as prestress and then impulse breakdown voltage was superimposed for the breakdown test. By the application of DC prestress of homo polarity with impulse voltage, the impulse breakdown strength of KP and PP film was found to be increased. On the other hand, by the application of DC prestress of hetero polarity, the breakdown strength of KP was found to be increased, which was unique to paper material. We proposed the negative charge injection model into KP to explain this result. Furthermore, the breakdown strength of PPLP was almost the same under the application of DC prestress of 10 kV. The influence of DC prestress on impulse breakdown strength appeared to be different depending on the specimen, and the possible model at this moment was discussed.
Starting Page	361
Ending Page	364
File Size	616242
Page Count	4
File Format	PDF
ISBN	9781467312530
ISSN	00849162
e-ISBN	9781467312523
e-ISBN	9781467312516
DOI	10.1109/CEIDP.2012.6378795
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-10-14
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electric breakdown Films Breakdown voltage Electrodes Superconducting cables Electric fields
Content Type	Text
Resource Type	Article

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