CVケーブルにおける人工水トリー劣化手法の検討（その2）－加熱・ヒートサイクルによる水トリー伸展手法の提案－

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: 2021/01/01

タイトル(英語): Study on Artificial Water Tree Degradation Method for XLPE Power Cables (Part 2)－Proposal of Method for Water Tree Propagation under Continuous Heating and Heat Cycle Conditions－

著者名: 栗原　隆史（（一財）電力中央研究所），三坂　英樹（（一財）電力中央研究所），髙橋　俊裕（（一財）電力中央研究所），髙橋　紹大（（一財）電力中央研究所）

著者名(英語): Takashi Kurihara (Central Research Institute of Electric Power Industry), Hideki Misaka (Central Research Institute of Electric Power Industry), Toshihiro Takahashi (Central Research Institute of Electric Power Industry), Tsuguhiro Takahashi (Central Rese

キーワード: CVケーブル，水トリー，人工劣化，温度条件，劣化診断　　XLPE cables，water trees，artificial degradation，temperature condition，degradation diagnosis

要約(英語): In order to determine the effective temperature condition for artificially accelerating propagation of harmful water trees in insulation of 3.3 to 77 kV XLPE cables, an AC voltage of 13 kV and 1200 Hz was applied to a 22 kV XLPE cable removed from service at room temperature, 50℃, 60℃ and 70℃, and under the heat cycle conditions between room temperature and 50℃, 60℃ or 70℃. As a result, it was found that bow-tie water trees propagated up to a few mm at 70℃ and under the heat cycle condition between room temperature and 70℃, and shapes of bow-tie water trees were narrow and long like those of harmful water trees. Factors that were effective for accelerating water tree growth were discussed with the results of thermal, mechanical, and X-ray analyses and an evaluation of oxidation of the XLPE insulation. In addition, AC withstand voltage tests were performed for the cable samples after 300 days of water tree degradation at 70℃ and under the heat cycle condition between room temperature and 70℃.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.141 No.1 （2021） 特集：2021年研究開発の動向と最前線

本誌掲載ページ: 76-84 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/141/1/141_76/_article/-char/ja/