雷電沖擊電壓下局部放電檢測方法有效性研究
鄢陽,張連星
(國網(wǎng)電力科學(xué)研究院武漢南瑞有限責(zé)任公司,湖北 武漢 430074)
摘 要:為了研究沖擊電壓下局部放電現(xiàn)象,搭建了沖擊電壓發(fā)生裝置。以油紙絕緣氣隙模型為試驗對象,通過超聲波法、高頻電流法和超高頻法對雷電沖擊電壓波形下的局部放電信號進(jìn)行測量,列出典型波形進(jìn)行對比分析。試驗結(jié)果表明,高頻電流法能有效提取局部放電脈沖,為進(jìn)一步研究沖擊電壓下局部放電特征和機(jī)理提供參考。
關(guān)鍵詞:沖擊電壓;局部放電;高頻電流法;超聲波法;超高頻法
中圖分類號:TM866 文獻(xiàn)標(biāo)識碼:A 文章編號:1007-3175(2016)04-0046-03
Validation Study of Partial Discharge Detection Method Under Lightning Impulse Voltage
YAN Yang, ZHANG Lian-xing
(Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute, Wuhan 430074, China)
Abstract: In order to research the partial discharge (PD) phenomena under impulse voltage (IV), a device of IV has been set up. Taking the air gap of oil-paper insulation model as testing object, PD pulses signal under Lightning IV was detected by AE, HFCT and UHF. The typical waveforms were listed for analyzing. The testing results show that HFCT can effectively extract the PD pulses, which could play a very important role for further studying PD characteristic and mechanism under IV.
Key words: impulse voltage; partial discharge; HFCT; AE; UHF
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