三層同時押出方式の6.6kV CVケーブルにおける遮蔽層の電気抵抗測定と腐食・破断要因の解明

カテゴリ: 論文誌(論文単位)

グループ名: 【B】電力・エネルギー部門

発行日: 2023/08/01

タイトル(英語): Measurements of Electrical Resistances and Investigations of Factors Affecting Corrosion and Breakages of Shielding Layers in Extruded Three-layer 6.6kV XLPE Cables

著者名: 栗原　隆史（（一財）電力中央研究所），木村　健一（東北電力ネットワーク（株）），渡部　卓也（東北電力ネットワーク（株）），佐藤　智之（東北電力ネットワーク（株））

著者名(英語): Takashi Kurihara (Central Research Institute of Electric Power Industry), Kenichi Kimura (Tohoku Electric Power Network Co., Inc.), Takuya Watanabe (Tohoku Electric Power Network Co., Inc.), Tomoyuki Sato (Tohoku Electric Power Network Co., Inc.)

キーワード: 6.6kV CVケーブル，三層同時押出，遮蔽層，腐食・破断，加速劣化試験　　6.6kV XLPE cables，E-E type，shielding layers，corrosion and breakages，accelerated degradation test

要約(英語): Corrosion and breakages of shielding layers are one of the factors for degradation of extruded three-layer (E-E type) 6.6kV cross-linked polyethylene (XLPE) cables. Tohoku Electric Power Network has been measuring electrical resistances of shielding layers in E-E type 6.6kV XLPE cables, and recently has found breakages of shielding layers. The authors performed an accelerated degradation test for shielding layers of E-E type 6.6kV XLPE cables by taking account of aqueous solution, temperature, heat cycles, bending stress, frequency of an applied voltage, and water-proof layer in the test conditions, and investigated factors affecting corrosion and breakages of shielding layers. Corrosion, cracks, and breakages were found on shielding layers in the cables without water-proof layer, but no crack was found in the cables with water-proof layer, when heat cycles were applied to the cables, and shielding layers were supplied with artificial sea water. We investigated the suppressive effect of the cables with water-proof layer on cracks and breakages of shielding layers by measuring tensile strengths of copper tapes obtained from the shielding layers of the cables with and without water-proof layers.

本誌: 電気学会論文誌B（電力・エネルギー部門誌） Vol.143 No.8 （2023）

本誌掲載ページ: 503-512 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/ieejpes/143/8/143_503/_article/-char/ja/