开关设备中双典型缺陷的局部放电特性研究
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摘要
在商用实体开关腔体中对典型局部放电源的放电特征进行了分析研究。综合应用暂态对地电压(TEV)和特高频(UHF)技术对单一典型缺陷的局部放电和双典型缺陷局部放电分别进行了检测与分析。实验结果表明,随着电压升高,典型局部放电源的放电量逐渐增大,发生放电的相位也逐渐变宽。局部放电信号相对幅值均与所加电压成近似线性关系,幅值能够表明其局部放电的严重程度。不同典型缺陷的局部放电信号放电脉冲相位图谱不同。当两者典型局部放电源同时存在时放电脉冲相位图谱会进行叠加,从而影响PRPD图谱的形状,可依据典型局部放电的典型图谱进行区分。
The discharge characteristics of typical partial discharge source are analyzed for commercial switchgear.Transient Earth Voltage(TEV)and ultra-high frequency(UHF)detection technology are used to detect and analysison the typical partial discharge source. Experimental results show that as the applied voltage increases,partial dis-charge quantity increases gradually,and the phase of discharge becomes wider. An approximate linear formulationcan be used to describe the relationship between the relative amplitude and the applied voltages,the relative ampli-tude can show the severity of partial discharge. Partial discharge signals with different typical defects are different indischarge pulse phase spectrum. When two typical defects coexist the Phase Resolved Partial Discharge(PRPD)aresuperimposed,and the PRPD shape will be complicated,it can be distinguished according to the typical map of typical partial discharge.
The discharge characteristics of typical partial discharge source are analyzed for commercial switchgear.Transient Earth Voltage(TEV)and ultra-high frequency(UHF)detection technology are used to detect and analysison the typical partial discharge source. Experimental results show that as the applied voltage increases,partial dis-charge quantity increases gradually,and the phase of discharge becomes wider. An approximate linear formulationcan be used to describe the relationship between the relative amplitude and the applied voltages,the relative ampli-tude can show the severity of partial discharge. Partial discharge signals with different typical defects are different indischarge pulse phase spectrum. When two typical defects coexist the Phase Resolved Partial Discharge(PRPD)aresuperimposed,and the PRPD shape will be complicated,it can be distinguished according to the typical map of typical partial discharge.
引文
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[9] KANE C,BLOKHINTSEV I,GOLUBEV A. Measurement and analysis of partial discharges in switchgear[C]//IEEE EIC.[S.l.]:IEEE,2005:203-210.
[10] ZHAO X F,YAO X,GUO Z F,et al. Partialdischarge characteristics and mechanism in voids under impulse voltage[J].Measurement Science&Technology,2011,22(35):704-710.
[11] DAVIES N,JONES D. Testing distribution switchgear for partial discharge in the laboratory and the field[C]//Conference Record of the 2008 IEEE International Symposium on Electrical Insulation.[S.l.]:IEEE,2008:716-719.
[12] LUNDGAARD L E,RUNDE M,SKYBERG B,et al. Acoustic diagnosis of gasinsulated substations:A theoretical and experimental basis[J]. IEEE Trans. Power Del.,1990,5(4):1751-1759.
[2]田勇,田景林. 6~10 kV开关柜事故统计分析与改进意见[J].东北电力技术,1996(8):5-10.TIAN Yong,TIAN Jinglin. The statistics and analysis of faults in 6~10 kV switchgears[J]. Northeast Electric Power Technology,1996(8):5-10.
[3]任明,彭华东,陈晓清,等.采用暂态对地电压法综合检测开关柜局部放电[J].高电压技术,2010,36(10):2460-2466.REN Ming,PENG Huadong,CHEN Xiaoqing,et al. Comprehensive detection of partial discharge in switchgear using TEV[J]. High Voltage Engineering,2010,36(10):2460-2466.
[4]王有元,李寅伟,陆国俊,等.开关柜局部放电暂态对地电压传播特性的仿真分析[J].高电压技术,2011,37(7):1683-1688.WANG Youyuan,LI Yinwei,LU Guojun,et al. Simulation of transient earth voltages aroused by partial discharge in switchgears[J]. High Voltage Engineering,2011,37(7):1683-1688.
[5]李德军,沈威,郭志强. GIS局部放电常规检测和超声波检测方法的应用比较[J].高压电器,2009,45(3):99-103.LI Dejun,SHEN Wei,GUO Zhiqiang. Application comparison between conventional and ultrasonic detection methods for GIS partial discharge[J]. High Voltage Apparatus,2009,45(3):99-103.
[6] REN Ming,DONG Ming,REN Zhong,et al. Transient earth voltage measurement in PD detection of artificial defect models in SF6[J]. IEEE Transactions on Plasma Science,2012,40(8):2002-2008.
[7] JENNINGS E,COLLINSON A. A partial discharge monitor for the measurementof partial discharges in a high voltage plant by the transientearth voltage technique[C]//in Proc.IEEE Int. Conf. Partial Discharge. Canterbury,U.K.:IEEE,1993:90-91.
[8]李继胜,赵学风,杨景刚,等. GIS典型缺陷局部放电测量与分析[J].高电压技术,2009,35(10):2440-2445.LI Jisheng,ZHAO Xuefeng,YANG Jinggang,et al. Measurement and analysis of partial discharge on typical defects in GIS[J]. High Voltage Engineering,2009,35(10):2440-2445.
[9] KANE C,BLOKHINTSEV I,GOLUBEV A. Measurement and analysis of partial discharges in switchgear[C]//IEEE EIC.[S.l.]:IEEE,2005:203-210.
[10] ZHAO X F,YAO X,GUO Z F,et al. Partialdischarge characteristics and mechanism in voids under impulse voltage[J].Measurement Science&Technology,2011,22(35):704-710.
[11] DAVIES N,JONES D. Testing distribution switchgear for partial discharge in the laboratory and the field[C]//Conference Record of the 2008 IEEE International Symposium on Electrical Insulation.[S.l.]:IEEE,2008:716-719.
[12] LUNDGAARD L E,RUNDE M,SKYBERG B,et al. Acoustic diagnosis of gasinsulated substations:A theoretical and experimental basis[J]. IEEE Trans. Power Del.,1990,5(4):1751-1759.