モールド変圧器の交流部分放電特性に及ぼす雷インパルスプレストレスの影響

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: 2018/08/01

タイトル(英語): Effect of Lightning Impulse Prestress on AC Partial Discharge Characteristics in Cast Resin Transformer

著者名: 丸山　裕史（九州工業大学），松尾　賢介（九州工業大学），小迫　雅裕（九州工業大学），匹田　政幸（九州工業大学），飯田　和生（三重大学），梅村　時博（三重大学），中村　勇介（（株）東芝 電力・社会システム技術開発センター），中前　哲夫（東芝産業機器システム（株）），前田　照彦（東芝産業機器システム（株）），東山　雅一（東芝産業機器システム（株））

著者名(英語): Hirofumi Maruyama (Kyushu Institute of Technology), Kensuke Matsuo (Kyushu Institute of Technology), Masahiro Kozako (Kyushu Institute of Technology), Masayuki Hikita (Kyushu Institute of Technology), Kazuo Iida (Mie University), Tokihiro Umemura (Mie Uni

キーワード: 部分放電，雷インパルス電圧プレストレス，モールド変圧器，交流部分放電開始電圧_x000D_　　partial discharge，lightning impulse voltage pre-stress，cast resin transformer，ac partial discharge inception voltage

要約(英語): It is crucial for cast resin transformer to detect void and delamination existing in the cast resin because these defects reduce insulation performance of cast resin equipment. Furthermore, defects are likely to be mixed in cast resin because of several surface boundaries between resin and conductor. It is considered that detecting partial discharge (PD) is effectiveness to diagnose equipment of power equipment. However, it is reported that withstand lightning impulse voltage test may give influence on AC partial discharge test, especially partial discharge inception voltage (PDIV). This paper deals with accumulated charge in a void under AC voltage to investigate the effect of the impulse voltage pre-stress on subsequent ac PD characteristics in cast resin transformer. AC PD characteristics were compared before and after impulse application. In addition, recovery of PD characteristics was measured to investigate charge decay. As a result, the mechanism of pre-stress effect is revealed and surface charge density is estimated quantitatively in cast resin transformer.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.138 No.8 （2018）

本誌掲載ページ: 422-427 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/138/8/138_422/_article/-char/ja/