Comparative Study on the Aging of Kraft Paper Insulation in Palm Fatty Acid Ester and Mineral Oil in Air Sealed Tank

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: 2016/08/01

タイトル(英語): Comparative Study on the Aging of Kraft Paper Insulation in Palm Fatty Acid Ester and Mineral Oil in Air Sealed Tank

著者名: Junko Tokunaga (Chiba Factory, Fuji Electric Transformer Section), Hidenobu Koide (Chiba Factory, Fuji Electric Transformer Section), Kenji Mogami (Chiba Factory, Fuji Electric Transformer Section), Tomoyuki Hikosaka (Chiba Factory, Fuji Electric Transfor

著者名(英語): Junko Tokunaga (Chiba Factory, Fuji Electric Transformer Section), Hidenobu Koide (Chiba Factory, Fuji Electric Transformer Section), Kenji Mogami (Chiba Factory, Fuji Electric Transformer Section), Tomoyuki Hikosaka (Chiba Factory, Fuji Electric Transformer Section)

キーワード: palm fatty acid ester，dielectric fluid，electrical properties，Kraft paper，aging，air sealed tank，pole transformer

要約(英語): A new biodegradable dielectric fluid for transformers, palm fatty acid ester (PFAE), with better cooling performance and oxidative stability than conventional mineral oil (MO) was developed in 2008. In this report, the thermal aging characteristics of Kraft paper (KP) in PFAE and MO were compared in air sealed tanks, in order to evaluate the applicability of PFAE to pole transformers. The degradation of paper impregnated in PFAE and MO was compared with degree of polymerization (DP) and tensile strength (TS). The electrical properties of PFAE and MO after aging were determined. The DP of the KP aged in MO is nearly half of that in PFAE after 365-day aging at 105℃. The TS of the KP in PFAE after 365-day aging at 105℃ decreases to about 78% of initial strength, while the TS for the paper in MO drops to 15%. After 365-day aging at 105℃, the breakdown voltage of aged PFAE is 76kV, while that for aged MO is 20kV; the dissipation factor of aged MO increased over 100 times, while that for PFAE kept the similar value. The production of sludge in aged MO makes it black, while aged PFAE keeps its transparence. Additionally, the mechanism on the suppression of KP degradation in PFAE is proposed.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.136 No.8 （2016） 特集：高性能永久磁石の最先端研究とその応用動向

本誌掲載ページ: 541-546 p

原稿種別: 論文／英語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/136/8/136_541/_article/-char/ja/