開(kāi)關(guān)柜帶電檢測(cè)應(yīng)用分析與解體實(shí)例
郭超,劉君,周波,楊紅權(quán),蔡川,宋穎,羅楊,高竣
(國(guó)網(wǎng)成都供電公司,四川 成都 610041)
摘 要:介紹了開(kāi)關(guān)柜帶電檢測(cè)三種方法的注意事項(xiàng)與應(yīng)用效果,闡述了一起利用超聲波法和特高頻法發(fā)現(xiàn)開(kāi)關(guān)柜內(nèi)部放電缺陷的案例,針對(duì)開(kāi)關(guān)柜內(nèi)部放電缺陷,通過(guò)幅值定位法確定放電源位置,利用放電脈沖波形特征確定放電類型。解體發(fā)現(xiàn)內(nèi)部嚴(yán)重放電痕跡,判斷放電由受潮與積灰導(dǎo)致,解體結(jié)果證實(shí)了帶電檢測(cè)的有效性,并為預(yù)防類似缺陷提供了相應(yīng)的建議。
關(guān)鍵詞:開(kāi)關(guān)柜;帶電檢測(cè);超聲波;特高頻
中圖分類號(hào):TM591 文獻(xiàn)標(biāo)識(shí)碼:B 文章編號(hào):1007-3175(2019)10-0042-05
Application Analysis and Disassembly Case of Live Detection for Switchgear
GUO Chao, LIU Jun, ZHOU Bo, YANG Hong-quan, CAI Chuan, SONG Ying, LUO Yang, GAO Jun
(State Grid Chengdu Power Supply Company, Chengdu 610041, China)
Abstract: Introduction was made to the matters need attention and application effect of three kinds of switchgear live detection methods. This paper expounded a case of inner discharge defect of switchgear with ultrasonic and ultrahigh frequency methods. In allusion to the switchgear inner discharge defect, the discharge location was determined by amplitude localization method. The discharge type was decided by the impulse waveform characteristics. The disassembly revealed the inner serious discharge trace. The damp and the dust were estimated as the discharge reason. The disassembly result verifies the validity of live detection, which provides the relevant advice for avoiding the similar fault.
Key words: switchgear; live detection; ultrasonic; ultrahigh frequency
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