Characteristics of AC Creeping Discharge Propagating over Pressboard Immersed in Deteriorated Vegetable-based Oils

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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: 2016/12/01タイトル(英語): Characteristics of AC Creeping Discharge Propagating over Pressboard Immersed in Deteriorated Vegetable-based Oils著者名: R yoichi Hanaoka (Department of Electrical and Electronic Engineering, Kanazawa Institute of Technology), Katsunori Miyagi (Department of Electrical and Electronic Engineering, Kanazawa Institute of Technology), Kiyoshi Takamoto (Kanden Engineering Corpora著者名(英語): Ryoichi Hanaoka (Department of Electrical and Electronic Engineering, Kanazawa Institute of Technology), Katsunori Miyagi (Department of Electrical and Electronic Engineering, Kanazawa Institute of Technology), Kiyoshi Takamoto (Kanden Engineering Corporation), Seiichi Nishikawa (Kanden Engineering Corporation), Takashi Suzuki (Lion Specialty Chemicals Co., Ltd.), Masanori Nikaido (Lion Specialty Chemicals Co., Ltd.)キーワード: AC high voltage，deteriorated vegetable and mineral oils，discharge shape，streamer extension，discharge current, discharge energy要約(英語): The characteristics of creeping discharge propagating on the pressboard surface in vegetable-based oils (crude rapeseed oil and PFAE (palm fatty acid ester) oil) and commercial mineral oil with the thermally accelerated aging were investigated by applying AC high voltages of 60Hz to the needle electrode. The pressboard impregnated with the sample oil under the vacuum condition was immersed completely into the same oil, and the tungsten needle electrode was installed in the one side of pressboard surface without the counter electrode. The other side of pressboard has the grounded fine copper rod as a back side electrode (BSE). The discharge shape, streamer extension, streamer velocity, discharge current, discharge energy, pressboard surface tracking and pressboard puncture in the deteriorated oils were examined as a function of the voltage and its imposed time in comparison with those in the original oils. The AC creeping discharge in oils basically grows slowly in the distinctive shape which is characterized by many formations of a fine branching, flashing spot and current pulse under a fixed voltage regardless of the presence/absence of deterioration. However, in this paper, it is reported that the streamer length, streamer velocity, amplitude of discharge current pulses and discharge energy are significantly affected by the deterioration of oils.本誌: 電気学会論文誌B（電力・エネルギー部門誌） Vol.136 No.12 （2016）本誌掲載ページ: 918-926 p原稿種別: 論文／英語電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejpes/136/12/136_918/_article/-char/ja/ Show more