基于脈沖電流法和TEV的開關(guān)柜局部放電檢測研究 

王衛(wèi)東，張繼坤，趙建沛，張高潮 
河南省高壓電器研究所，河南 平頂山 467000 
 

摘 要：為研究高壓開關(guān)柜內(nèi)部局部放電檢測方法的有效性，利用35kV智能試驗(yàn)開關(guān)柜，在其內(nèi)部設(shè)置高壓導(dǎo)體尖端缺陷，運(yùn)用脈沖電流法和暫態(tài)對地電壓法(TEV)進(jìn)行局部放電檢測，并通過TEV法進(jìn)行局部放電源的定位。經(jīng)現(xiàn)場實(shí)際應(yīng)用可知，脈沖電流法和TEV法是檢測開關(guān)柜局部放電的有效方法，且兩種方法需要配合來綜合確認(rèn)；脈沖電流法抗干擾能力差，TEV法抗干擾能力強(qiáng)，對局部放電源準(zhǔn)確定位和能夠不停電檢測局部放電。
關(guān)鍵詞：脈沖電流法；暫態(tài)對地電壓法；開關(guān)柜；局部放電
中圖分類號：TM591；TM855 文獻(xiàn)標(biāo)識碼：A 文章編號：1007-3175(2015)08-0051-04

Research on Partial Discharge Detection of Switchgear Based on Pulse Current Method and Transient Earth Voltage 

WANG Wei-dong, ZHANG Ji-kun, ZHAO Jian-pei, ZHANG Gao-chao 
Henan High Voltage Apparatus Research Institute, Pingdingshan 467000, China 
 

Abstract:In order to study the validity of detection method of the high voltage switchgear internal partial discharge, in the 35 kV intelligent test switchgear, the high pressure conductor cutting-edge defects were set. The pulse current method and the transient earth voltage (TEV) method were used to carry out partial discharge detection and the TEV method was adopted to carry out the location of partial discharge sources. After actual application on site, the results show that the pulse current method and the TEV method are the effective ways to detect switchgear partial discharge and the two ways need to be match up to affirm comprehensively. The pulse current method has bad anti-jamming ability, while the TEV method has strong anti-jamming capability, being able to position accurately and to detect partial discharge without power outages.
Key words: pulse current method; transient earth voltage; high voltage switchgear; partial discharge

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