三層同時押出方式6.6kV CVケーブルの遮蔽層破断による焼損発生メカニズムの検討

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: 2024/11/01

タイトル(英語): Investigation on Fire Damage Caused by Breakage of Shielding Layer in Extruded Three-layer 6.6kV XLPE Cables

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

著者名(英語): Takashi Kurihara (Central Research Institute of Electric Power Industry), Kazuyuki Nakano (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，外部半導電層，焼損　　6.6kV XLPE cable，E-E type，shielding layer，corrosion and breakage，outer semiconducting layer，fire damage

要約(英語): Breakage of shielding layers is one of the factors for degradation of extruded three-layer (E-E type) 6.6kV cross-linked polyethylene (XLPE) cables. When a shielding layer breaks, where a charging current flows through an outer semiconducting layer, it is possible that a potential difference would arise at the gap of the shielding layer and temperature of the outer semiconducting layer increases, which may result in a fire accident of the cable. To investigate its mechanism, we applied an AC voltage as the potential difference to the gap between copper tapes which simulated a breakage of a shielding layer of an E-E type 6.6kV XLPE cable, and measured a current flowing through an outer semiconducting layer and temperature between the gap until the outer semiconducting layer caught fire. As a result, it was found that the temperature of the outer semiconducting layer between the gap exceeded 150℃ immediately after the voltage application, and increased up to 250℃ and higher just before the fire damage occurred. This result suggests that the temperature reached the ignition point of the outer semiconducting layer.

本誌: 電気学会論文誌B（電力・エネルギー部門誌） Vol.144 No.11 （2024）

本誌掲載ページ: 595-603 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/144/11/144_595/_article/-char/ja/