高壓開關(guān)柜局放檢測技術(shù)的現(xiàn)場應(yīng)用
張顯龍,李通
(廣東電網(wǎng)有限責(zé)任公司東莞供電局,廣東 東莞 523000)
摘 要:高壓開關(guān)柜對其開展局放檢測,及早發(fā)現(xiàn)絕緣缺陷,意義重大。介紹了暫態(tài)對地電壓(TEV)及超聲波(AE)檢測方法,結(jié)合現(xiàn)場經(jīng)驗,從聲電結(jié)合、趨勢分析等方面總結(jié)了這兩種方法在現(xiàn)場的應(yīng)用;分析了開關(guān)柜產(chǎn)生局部放電的原因,給出了廣東電網(wǎng)某10 kV開關(guān)柜的局放案例分析,案例表明基于TEV和AE原理的檢測技術(shù)在現(xiàn)場的應(yīng)用效果較好,為后續(xù)的現(xiàn)場檢測工作提供參考。
關(guān)鍵詞:開關(guān)柜;局放;暫態(tài)對地電壓;超聲波;檢測
中圖分類號:TM591 文獻標(biāo)識碼:B 文章編號:1007-3175(2018)05-0059-05
Field Application of Detection Technology for High Voltage Switchgear
ZHANG Xian-long, LI Tong
(Dongguan Power Supply Bureau, Guangdong Power Grid Co., Ltd, Dongguan 523000, China)
Abstract: it is very important for high voltage switchgears to carry out partial discharge test so as to find the insulation defects early. Introduction was made to the transient earth voltage(TEV) and acoustic emission(AE) detection methods. Combining with the field experience, this paper summarized the application of two methods from the aspects of the combination of sound and electricity and trend analysis, and analyzed the reasons for the partial discharge of the switchgear, giving the case analysis of 10 kV switchgear partial discharge in certain Guangdong power grid. The case shows that the detection technology based on TEV and AE principles has good application effect on the field, which provides important references for subsequent field detection.
Key words: switchgear; partial discharge; transient earth voltage; acoustic emission; detection
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