パルス電圧を用いた残留電荷測定に基づく水トリー劣化CVケーブル診断手法の基礎検討

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: 2014/08/01

タイトル(英語): Fundamental Study on Diagnostic Method of Water Tree Degraded XLPE Cables using Residual Charge Detection with Pulse Voltages

著者名: 栗原　隆史（（一財）電力中央研究所），岡本　達希（（一財）電力中央研究所），金　明煥（豊橋技術科学大学），穂積　直裕（豊橋技術科学大学），辻　泰三（中部電力（株）），宮島　和久（中部電力（株）），内田　克己（中部電力（株））

著者名(英語): Takashi Kurihara (Central Research Institute of Electric Power Industry), Tatsuki Okamoto (Central Research Institute of Electric Power Industry), Myong Hwan Kim (Toyohashi University of Technology), Naohiro Hozumi (Toyohashi University of Technology), Taizo Tsuji (Chubu Electric Power Co., Inc.), Kazuhisa Miyajima (Chubu Electric Power Co., Inc.), Katsumi Uchida (Chubu Electric Power Co., Inc.)

キーワード: CVケーブル，水トリー，劣化診断法，残留電荷法，パルス電圧　　XLPE cable，water tree，degradation diagnostic method，residual charge method，pulse voltage

要約(英語): One of the degradation diagnostic methods for water tree degradation of XLPE cables is the residual charge method. In this method, a DC voltage is applied to a water tree degraded XLPE cable in order to accumulate space charges in water tree parts of an XLPE cable, and an AC voltage is applied to it in order to release deeply trapped space charges, i.e. residual charges. The authors have been developing a new diagnostic method with pulse voltages instead of DC and AC voltages. In this study, we first applied pulse voltages with a pulse width of about 1ms to an artificial water tree degraded XLPE cable, and found that the residual charge increased with the increase in the degradation degree. Second, we confirmed that residual charges were successfully detected in the removed 6.6kV XLPE cables that had water tree degradation. Finally, we investigated the relationship between the residual charge signal and the AC breakdown voltage of the removed 6.6kV XLPE cables. The results clarified that the removed cables with larger residual charge and longer duration of current signal related to water tree degradation had a lower AC breakdown voltage.

本誌: 電気学会論文誌B（電力・エネルギー部門誌） Vol.134 No.8 （2014） 特集：最近の電線・ケーブル技術

本誌掲載ページ: 648-658 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/134/8/134_648/_article/-char/ja/