OFケーブルの銅化合物劣化に関する絶縁油分析診断法の開発と現場適用

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: 2023/06/01

タイトル(英語): Development and Field Application of Diagnostic Methods Based on Insulating Oil Analysis for Degradation due to Copper Compounds in Oil-Filled Cables

著者名: 杉本　修（東京電設サービス（株）），神保　安良（東京電設サービス（株）），小山　勇人（東京電設サービス（株）），相原　靖彦（東京電力ホールディングス（株）），永田　健一（東京電力パワーグリッド（株）），京極　智輝（東京電力パワーグリッド（株））

著者名(英語): Shu Sugimoto (Tokyo Densetsu Service Co., Ltd.), Yasuyoshi Jinbo (Tokyo Densetsu Service Co., Ltd.), Hayato Koyama (Tokyo Densetsu Service Co., Ltd.), Yasuhiko Aihara (Tokyo Electric Power Company Holdings, Inc.), Kenichi Nagata (Tokyo Electric Power Comp

キーワード: OFケーブル，銅化合物，硫化銅，絶縁油分析，劣化診断　　oil-filled cable，copper compounds，copper sulfide，insulating oil analysis，degradation diagnosis

要約(英語): In recent years, breakdown failures occur in joint boxes of oil-filled cables associated with the adhesion of copper compounds, such as copper sulfide or organocopper compounds. This is the adhesion degradation of copper compounds due to electric charging. Therefore, the degradation should be diagnosed for keeping its high reliability. However, the degradation cannot be predicted by the conventional diagnostic methods based on dissolved gas analysis, because the definition of degradation aspect in the method does not assume this degradation. Therefore, a new degradation diagnosis method is developed based on insulating oil analysis and the trend of the concentration of dissolved copper in the oil and the concentration of combustible gas generated due to the degradation. However, it is not possible to measure the concentration of dissolved copper in the past 30 years, because the majority of oil-filled cables are over 30 years old. Therefore, the past concentration of dissolved copper is calculated by the dielectric loss tangent value of oil, which has been traditionally measured. As a result, the consistency rate of the diagnostic methods was confirmed to be more than 80% by comparison with the results of demolition investigations of the using joint boxes.

本誌: 電気学会論文誌B（電力・エネルギー部門誌） Vol.143 No.6 （2023） 特集：配電用変電所保護リレーシステムをはじめとした保護リレーシステム技術

本誌掲載ページ: 411-423 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/143/6/143_411/_article/-char/ja/