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モールド変圧器のインピーダンス周波数特性の解明と部分放電診断手法への適用

モールド変圧器のインピーダンス周波数特性の解明と部分放電診断手法への適用

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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: 2021/07/01

タイトル(英語): Elucidation of Impedance Frequency Characteristics of Cast Resin Transformer and Application to Partial Discharge Diagnostic Method

著者名: 柿本 康朝(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(東芝インフラシステムズ(株)),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)),尾崎 多文(東芝産業機器システム(株))

著者名(英語): Yasutomo Kakimoto (Kyushu Institute of Technology), Masahiro Kozako (Kyushu Institute of Technology), Masayuki Hikita (Kyushu Institute of Technology), Kazuo Iida (Mie University), Tokihiro Umemura (Mie University), Yusuke Nakamura (Toshiba Infrastructure

キーワード: 部分放電,モールド変圧器,インピーダンス周波数特性,変圧器高周波等価回路  partial discharge,cast resin transformer,impedance frequency characteristics,transformer equivalent circuit at high frequencies

要約(英語): It is desired to establish an insulation diagnosis method for cast resin transformers (CRTr), which is often used in distribution systems. Partial discharge (PD) detection is considered to be an effective method, but its phenomenon has not yet been clarified. This paper presents investigation on the frequency characteristics of PD generated inside CRTr to improve PD detection technology. It is clarified that dominant frequency of PD signal detected by a high frequency CT depends on the frequency characteristics of the impedance between the primary and secondary windings. It is suggested that the dominant frequency could be predicted in advance by analysis using a high-frequency equivalent circuit model of CRTr. PD diagnostic technology that utilizes the frequency characteristics of the CRTr impedance has also been proposed. It is found that a PD generated external to CRTr does not have resonance at the dominant frequency of the CRTr itself, even though it passes through the CRTr. In conclusion, it is suggested that the frequency analysis of CRTr impedance could identify degraded CRTr and external noise.

本誌: 電気学会論文誌A(基礎・材料・共通部門誌) Vol.141 No.7 (2021)

本誌掲載ページ: 420-427 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/141/7/141_420/_article/-char/ja/

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