基于超聲波法的GIS局部放電測試及分析
徐亮1，鄒劍鋒2，何峰1，王廣2
1 國網(wǎng)浙江平湖市供電公司，浙江 平湖 314200； 2 國網(wǎng)嘉興供電公司，浙江 嘉興 314033
摘 要：介紹了引起氣體絕緣開關(guān)設(shè)備(GIS)局部放電的主要缺陷，分析了基于超聲波法的GIS局部放電測試的原理、試驗接線及注意事項，對部分變電站GIS設(shè)備進行了超聲波局部放電測試。經(jīng)測試結(jié)果分析表明，若周期峰值小于15mV，應(yīng)以跟蹤監(jiān)測為主；若大于15mV，應(yīng)考慮進行分合閘操作，再進行復測，如果信號消失，信號由動靜觸頭接觸不良引發(fā)的可能性較大，若分合閘不能消除信號，建議停電檢查。
關(guān)鍵詞：超聲波法；氣體絕緣開關(guān)設(shè)備；局部放電
中圖分類號：TM591；TM855 文獻標識碼：A 文章編號：1007-3175(2014)04-0052-04
Partial Discharge Testing of Gas Insulated Switchgear and Analysis Based on Ultrasonic Method
XU Liang1, ZOU Jian-feng2, HE Feng1, WANG Guang2
1 Zhejiang Pinghu Power Supply Company of State Grid, Pinghu 314200, China;
2 Jiaxing Power Supply Company of State Grid, Jiaxing 314033, China
Abstract: Introduction was made to the major defects causing partial discharge of gas insulated switchgear. Analysis was made to the principle of gas insulated switchgear (GIS) partial discharge testing based on the ultrasonic method, test connection, advertent items. Part of GIS equipment in subordinated substations was carried out partial discharge testing based on the ultrasonic. The testing results analysis shows that tracking and monitoring were given priority when the periodic peak value was less than 15 mV; breaking and closing were considered when the periodic peak value was more than 15 mV, and then repetition measurement was carried out. If the signals disappeared, it was more possible for the moving and fixed contacts to turn up bad contact. If the signals didn’t disappear, power cut and examine were suggested.
Key words: ultrasonic method; gas insulated switchgear; partial discharge
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