基于脈沖電流法和TEV的開關柜局部放電檢測研究
王衛東，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：為研究高壓開關柜內部局部放電檢測方法的有效性，利用35kV智能試驗開關柜，在其內部設置高壓導體尖端缺陷，運用脈沖電流法和暫態對地電壓法(TEV)進行局部放電檢測，并通過TEV法進行局部放電源的定位。經現場實際應用可知，脈沖電流法和TEV法是檢測開關柜局部放電的有效方法，且兩種方法需要配合來綜合確認；脈沖電流法抗干擾能力差，TEV法抗干擾能力強，對局部放電源準確定位和能夠不停電檢測局部放電。
關鍵詞：脈沖電流法；暫態對地電壓法；開關柜；局部放電
中圖分類號：TM591；TM855 文獻標識碼：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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