油入ブッシングの内部部分放電診断手法の開発

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: 2014/02/01

タイトル(英語): Development of Diagnosis Method for Partial Discharge in Oil-filled Bushing

著者名: 牟田神東　達也（（株）かんでんエンジニアリング／兵庫県立大学大学院），川崎　誠（（株）かんでんエンジニアリング），岡田　翔（兵庫県立大学大学院），上野　秀樹（兵庫県立大学大学院）

著者名(英語): Tatsuya Mutakamihigashi (Kanden Engineering Co., Inc/University of Hyogo), Makoto Kawasaki (Kanden Engineering Co., Inc), Sho Okada (University of Hyogo), Hideki Ueno (University of Hyogo)

キーワード: 部分放電，放射電磁波，特徴周波数，油入ブッシング，劣化診断　　partial discharge，radiated electromagnetic wave，characteristic frequency，oil-filled bushing，degradation diagnosis

要約(英語): The technique of analyzing the gases dissolved in insulating oil has been widely used to degradation diagnosis of oil-filled equipment such as transformers. On the other hand, oil-filled bushings can not be getting oil because power cut is required. In our study, we found that there are characteristics in frequency components of the electromagnetic wave radiated by partial discharge in oil. By using this characteristic, we have developed a method that can diagnose equipment in hot-line condition. However the cause of the characteristics has not been understood physically. Electromagnetic wave due to partial discharge is caused by the discharge current. It is expected that pulse waveform of current is steep if the velocity of charge is high, but waveform is gentle if the velocity is low. It is also expected that frequency of the electromagnetic wave is higher if the pulse waveform become steeper. Further, the moving velocity of the charge depends on the field strength. In addition, the strength of breakdown electric field depends on the insulating material. Then we forecast characteristic frequency components of partial discharge are affected by the difference of the electric field strength. So we tested the relationship between the rise time of the discharge current and the electric field strength. As a result, we confirmed that the discharge current waveform becomes steep due to the higher field strength. In this paper, we report the test result and developed method. And more, we introduce the examples of diagnostic result in field.

本誌: 電気学会論文誌B（電力・エネルギー部門誌） Vol.134 No.2 （2014） 特集：接地と雷害・EMC対策

本誌掲載ページ: 177-182 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/134/2/134_177/_article/-char/ja/