経年変圧器油の飽和水分溶解量と温度, 酸価, 分子量との関係

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: 2013/11/01

タイトル(英語): The Relation between Saturation Solubility of Water and Temperature, Acid Number, and Molecular Weight in Service Aged Transformer Oils

著者名: 佐藤　学（ユカインダストリーズ（株）），小西　義則（ユカインダストリーズ（株）），太田　延幸（ユカインダストリーズ（株）），中塚　俊（東北電力（株）），八重樫　裕司（東北電力（株））

著者名(英語): Gaku Sato (Yuka Industries Co., Ltd.), Yoshinori Konishi (Yuka Industries Co., Ltd.), Nobuyuki Oota (Yuka Industries Co., Ltd.), Takashi Nakatsuka (Tohoku Electric Power Co., Inc.), Yuji Yaegashi (Tohoku Electric Power Co., Inc.)

キーワード: 飽和水分溶解量，絶縁油，油中水分，水分飽和度，酸価，分子量　　saturated water content，insulating oil，water content，relative saturation，acid number，molecular weight

要約(英語): The water content in oil-filled electrical equipment is important in connection with evaluation of dielectric strength of insulating oil, deterioration of insulating materials, and the bubble evolution in transformer windings during overload. So the water content and the solubility of water in insulating oil that is represented by saturated water content (Ws), is an essential part of transformer condition monitoring and maintenance. It is well known that the main factors determining Ws are temperature, aromatic content, and acid number. However, changes in acid number cannot explain changes in Ws. It has been reported that in the process of oxidative deterioration of the insulating oil, molecular weight changes. However, the change in molecular weight due to oxidative deterioration has not been considered in evaluation of Ws. In this paper, we have proposed a new estimating equation of Ws considering the changes in molecular weight of the insulating oil. The new estimating equation for Ws includes temperature, acid number, and molecular weight, and it was possible to estimate Ws in insulating oils that have various acid value and aromatic content. And it was found that deviations between the calculated values and the experimental values were less than 10%.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.133 No.11 （2013）

本誌掲載ページ: 598-605 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/133/11/133_598/_article/-char/ja/