Impact of Pressboard Aging States on the Time Domain Dielectric Characteristics of Oil-paper Insulation

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: 2013/07/01

タイトル(英語): Impact of Pressboard Aging States on the Time Domain Dielectric Characteristics of Oil-paper Insulation

著者名: Shiqiang Wang (State Key Lab of Electrical Insulation and Power Equipment, Xi'an Jiaotong University/SINOPEC Safety Engineering Institute), Guanjun Zhang (State Key Lab of Electrical Insulation and Power Equipment, Xi'an Jiaotong University)

著者名(英語): Shiqiang Wang (State Key Lab of Electrical Insulation and Power Equipment, Xi'an Jiaotong University/SINOPEC Safety Engineering Institute), Guanjun Zhang (State Key Lab of Electrical Insulation and Power Equipment, Xi'an Jiaotong University)

キーワード: oil-paper，time domain，aging，pressboard，DP，PDC

要約(英語): To investigate the effect of pressboard aging states on its time domain dielectric characteristics, experiments are designed to measure the polarization and depolarization currents (PDC) of different aged pressboard samples. Firstly, new pressboard samples immersed in new transformer oil are thermally aged for different time intervals and then residual oil in aged pressboard samples is removed by de-oiling solvent. Secondly, these pressboard samples are dried in a vacuum oven to remove de-oiling solvent and moisture. The degree of polymerization (DP) is measured to characterize the aging states of each sample. Finally, PDC tests are performed on each pressboard sample respectively in vacuum and new-oil-impregnated ambiences. Experimental results show that badly aged pressboard exhibits larger polarization, depolarization and conduction currents. The deterioration of solid insulation increases its conductivity and enhances its polarization.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.133 No.7 （2013）

本誌掲載ページ: 414-415 p

原稿種別: 研究開発レター／英語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/133/7/133_414/_article/-char/ja/