基于超聲波飛行圖的GIS自由金屬微粒缺陷診斷研究
戎琳1,賈勇勇2,楊景剛2
1 國(guó)電南瑞科技股份有限公司,江蘇 南京 210061;2 江蘇省電力公司電力科學(xué)研究院,江蘇 南京 211103
摘 要:自由金屬微粒是氣體絕緣開(kāi)關(guān)設(shè)備(GIS)中最常見(jiàn)的缺陷之一,極易引起絕緣子閃絡(luò)等絕緣故障。建立了自由金屬微粒的典型缺陷模型并進(jìn)行大量局部放電試驗(yàn),對(duì)信號(hào)的工頻相位相關(guān)性進(jìn)行判斷,確定了不同缺陷類型、不同試驗(yàn)電壓下放電超聲波飛行圖的特征差異,為GIS中自由金屬微粒缺陷的識(shí)別和診斷提供了一種有效的方法。
關(guān)鍵詞:氣體絕緣開(kāi)關(guān)設(shè)備;局部放電;自由金屬微粒;超聲波飛行圖;缺陷診斷
中圖分類號(hào):TM591;TM855 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):1007-3175(2014)10-0019-05
Study on Defect Diagnosis of Free Metal Particle in Gas Insulated Switchgear Based on Ultrasonic Flighting Plot
RONG Lin1, JIA Yong-yong2, YANG Jing-gang2
1 NARI Technology Co., Ltd, Nanjing 210061, China;
2 Jiangsu Electric Power Company Research Institute, Nanjing 211103, China
Abstract: Free metal particle is one of the most common defects of gas insulated switchgear (GIS), which causes insulation faults such as insulator flashover etc. easily. The typical defect model of free metal particle was set up and a great lot of partial discharge experiments were taken in lab. Power frequency phase correlation of signals was judged to detect different characteristics of ultrasonic flighting plot of different defects under different level of testing voltage, which provides a kind of effective recognition and diagnosis method for free metal particle defect in GIS.
Key words: gas insulated switchgear; partial discharge; free metal particle; ultrasonic flighting plot; defect diagnosis
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