ナノ粒子添加による絶縁油の交流絶縁破壊電圧向上メカニズム

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2017/02/01

タイトル(英語): Improvement Mechanism of AC Breakdown Voltage of Insulating Oil with Dispersed Nanoparticles

著者名: 小島　寛樹（名古屋大学），近藤　貴文（名古屋大学），花井　正広（福岡大学），早川　直樹（名古屋大学）

著者名(英語): Hiroki Kojima (Nagoya University), Takafumi Kondo (Nagoya University), Masahiro Hanai (Fukuoka University), Naoki Hayakawa (Nagoya University)

キーワード: 絶縁油，ナノ粒子，交流絶縁破壊電圧，水分量，凝集　　insulating oil，nanoparticle，ac breakdown voltage，water content，aggregation

要約(英語): We investigated the fundamental insulation characteristics of insulating oil with dispersed nanoparticles. The AC breakdown voltage of the insulating oil increased by mixing the dispersed hydrophilic nanoparticles, because the hydrophilic nanoparticles absorbed moisture in the oil, which decreased the number of weak points in the oil for breakdown. In contrast, the hydrophobic nanoparticles did not contribute to the increase of AC breakdown voltage, and decreased the AC breakdown voltage. On the other hand, in the case of overdosing of nanoparticles, the aggregation of nanoparticles caused the decrease in the AC breakdown voltage of the oil, which depended upon the volume concentration of nanoparticles regardless of the diameter of nanoparticles. The aggregation of nanoparticles was led by dielectrophoresis phenomenon, which brought the gap length dependence of the AC breakdown voltage of the insulating oil with the dispersed nanoparticles, because the gradient of electric field strength at the gap was smaller in the case of shorter gap length.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.137 No.2 （2017） 特集：2015 Korea-Japan Joint Symposium on Electrical Discharge and High Voltage Engineering並びに放電研究の最新動向

本誌掲載ページ: 101-106 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/ieejfms/137/2/137_101/_article/-char/ja/