絶縁紙-液体窒素複合系の絶縁破壊に及ぼすプレストレスの影響

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2014/12/01

タイトル(英語): Influence of Prestressing on Breakdown of Insulating Paper - Liquid Nitrogen Composite System

著者名: 川島　朋裕（豊橋技術科学大学），村上　義信（豊橋技術科学大学），長尾　雅行（豊橋技術科学大学），稲垣　芳宏（住友電気工業（株）），芦辺　祐一（住友電気工業（株）），増田　孝人（住友電気工業（株））

著者名(英語): Tomohiro Kawashima (Toyohashi University of Technology), Yoshinobu Murakami (Toyohashi University of Technology), Masayuki Nagao (Toyohashi University of Technology), Yoshihiro Inagaki (Sumitomo Electric Industries, Ltd.), Yuichi Ashibe (Sumitomo Electric Industries, Ltd.), Takato Masuda (Sumitomo Electric Industries, Ltd.)

キーワード: 絶縁紙，液体窒素，絶縁破壊，直流プレストレス，電荷侵入　　insulating paper，liquid nitrogen，breakdown，DC prestressing，charge injection

要約(英語): We have been studying a cryogenic electrical insulation system with PPLP (Polypropylene laminated paper)® for its application to high-temperature superconducting cable. PPLP®, which has the three-laminated structure of a kraft paper (KP), polypropylene (PP) film and a KP, has been reported to have an excellent insulation performance in liquid nitrogen (LN2). However, questions still remain in dielectric breakdown mechanism of PPLP® due to its laminated structure. In this paper, it is investigated the influence of prestressing on the impulse breakdown characteristic of KP and PP film to understand the basic breakdown characteristic of PPLP® in LN2 and we discussed the charge injection model into KP and PP film. As the result, the breakdown strength of KP and PP film under hetero polarity DC prestressing field application was not decreased compared with normal impulse breakdown strength, which was different from the general DC prestressing effects. Furthermore, it is particularly interesting that the breakdown strength of KP was increased under the positive DC prestressing field with negative impulse field in spite of hetero polarity DC prestressing field application. This result could be explained based on the charge injection model, in which negative charge may be easily injected inside KP through cellulose fiber interface.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.134 No.12 （2014） 特集：放電研究の最新動向

本誌掲載ページ: 629-634 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/134/12/134_629/_article/-char/ja/