基于特高频法的雷电冲击电压下实体GIS导杆尖刺缺陷局部放电检测和分析
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摘要
为保证气体绝缘组合电器(GIS)的安全运行,在现场开展冲击耐压试验越来越重要,振荡型冲击电压产生效率高,适合现场耐压试验使用。在开展冲击耐压试验的同时测量局部放电,可以更加全面掌握GIS的绝缘状态。导杆尖刺是GIS中比较典型的内部绝缘缺陷之一。为研究GIS导杆尖刺在雷电冲击电压下的局部放电特性,在实体330 kVGIS导杆上布置一尖刺缺陷,施加标准和振荡型雷电冲击电压波形,通过内、外置特高频传感器有效检测了局部放电信号,对比分析了标准和振荡型雷电冲击下的局部放电特性。结果表明利用多个特高频传感器可以有效检测冲击电压的局部放电信号;振荡型冲击电压下,放电信号既出现在电压波峰处,也出现在电压波谷处,而标准雷电,冲击电压下,放电只出现在电压的波峰附近;相比于标准雷电冲击电压,振荡型雷电冲击电压下的放电数较多而放电起始电压较低。
In order to ensure the safe operation of gas insulated switchgear(GIS), on-site impulse withstand voltage test is becoming more and more important. Oscillating impulse voltage is very suitable for the field test due to its high generating efficiency. Detecting partial discharge(PD) while conducting the on-site impulse withstand voltage test helps to get a better understanding of the GIS insulation state. The protrusion is a typical and harmful defect in GIS, so it is very significant to study the PD characteristics of the protrusion in GIS under oscillating lightning impulse voltage. The standard and oscillating lightning impulse voltage is applied on a 330 kV GIS that is set a protrusion at the conductor and the PD signals are measured using inner and outer UHF sensors at the same time.The variation of discharge position, maximum discharge amplitude and discharge number with the increasing of the voltage is analyzed.The results show that the PD signals under the impulse voltage can be effectively detected by using the multiple UHF sensors. The PDs under the oscillating lightning impulse occur at both the peak and valley of the voltage. The PDs under the standard lightning impulse only occur near the peak of the voltage. Compared to the results of the standard lightning impulse voltage, the PD number is larger and the PD inception voltage is lower under the oscillating impulse voltage.
In order to ensure the safe operation of gas insulated switchgear(GIS), on-site impulse withstand voltage test is becoming more and more important. Oscillating impulse voltage is very suitable for the field test due to its high generating efficiency. Detecting partial discharge(PD) while conducting the on-site impulse withstand voltage test helps to get a better understanding of the GIS insulation state. The protrusion is a typical and harmful defect in GIS, so it is very significant to study the PD characteristics of the protrusion in GIS under oscillating lightning impulse voltage. The standard and oscillating lightning impulse voltage is applied on a 330 kV GIS that is set a protrusion at the conductor and the PD signals are measured using inner and outer UHF sensors at the same time.The variation of discharge position, maximum discharge amplitude and discharge number with the increasing of the voltage is analyzed.The results show that the PD signals under the impulse voltage can be effectively detected by using the multiple UHF sensors. The PDs under the oscillating lightning impulse occur at both the peak and valley of the voltage. The PDs under the standard lightning impulse only occur near the peak of the voltage. Compared to the results of the standard lightning impulse voltage, the PD number is larger and the PD inception voltage is lower under the oscillating impulse voltage.
引文
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[7]IEC60060-3:2006 High Votage Test Techniques Part 3:Definitions and Requirements for On-site Tests[S].
[8]GB/T 16927.3-2010高电压试验技术第3部分现场试验的定义和要求[S].
[9]李军浩,车斌,韩旭涛,等.特高压气体绝缘组合开关设备现场冲击耐压试验及局部放电测量[J].高电压技术,2015,41(11):3659-3665.LI Junhao,CHE bin,HAN xutao,et al.Field impulse withstand test and partial discharge detection for ultra high voltage gas insulated switchgear equipment[J].High Volt-(上接第50页)age Engineering,2015,41(11):3659-3665.
[10]李军浩,韩旭涛,刘泽辉,等.电气设备局部放电检测技术述评[J].高电压技术,2015,41(8):2583-2601.LI Junhao,HAN Xutao,LIU Zehui,et al.Review on partial discharge measurement technology of electrical equipment[J].High Voltage Engineering,2015,41(8):2583-2601.
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[13]ZENG,F P,DONG Y,TANG J.Feature extraction and severity assessment of partial discharge under protrusion defect based on fuzzy comprehensive evaluation[J].IET Generation Transmission&Distribution,2015,9(16):2493-2500.
[14]GAO W S.Analysis of the intrinsic characteristics of the partial discharge induced by typical defects in GIS[J].IEEE Transactions on Dielectrics&Electrical Insulation,2013,20(3):782-790.
[15]DONG Y L.Features extraction and mechanism analysis of partial discharge development under protrusion defect[J].Journal of Electrical Engineering&Technology,2015,10(1):344-354.
[16]ZHAO X F,GUO Z F,LI Y M,et al.Partial discharge characteristics and mechanism in voids at impulse voltages[J].Measurement Science&Technology,2011,22(3):1-7.
[17]吴旭涛,李军浩,张亮,等.振荡型冲击电压下局部放电的检测及干扰分析[J].高压电器,2016,52(4):92-97.WU Xutao,LI Junhoa,ZHANG Liang,et al.PD detection and interference analysis under oscillating impulse voltage[J].High Voltage Apparatus,2016,52(4):92-97.
[18]YU J L,FAN Y D,WANG J G,et al.Characteristics of the horizontal electric field associated with nearby lightning return strokes[J].Journal of Atmospheric and Solar Terrestrial Physics,2017,154:207-216.
[19]SEEGER M,BUJOTZEK M,NIEMEYER L.Formactive time lag and breakdown in SF6 at small protrusions[C].Piscataway:Proceeding of 17th International Conference on Gas Discharges and Their Applications,NJ,IEEE,2008:317-320.
[20]SEEGER M,NIEMEYER L,BUJOTZEK M.Partial discharge and breakdown at protrusions in uniform background fields in SF6[J].Journal of Physics:Applied Physics,2008,41(18):185-204.
[2]钱勇,黄成军,江秀臣,等.GIS中局部放电在线监测现状及发展[J].高压电器,2004,40(6):453-456.QIAN Yong,HUANG Chengjun,JIANG Xiuchen,et al.Current status and development of pd online monitoring technology in gis[J].High Voltage Apparatus,2004,40(6):453-456
[3]尚勇,钱政,杨敏中,等.高电压设备绝缘老化及状态维修的实现[J].高电压技术,1999,25(3):40-42.SHANG Yong,QIAN Zheng,YANG Minzhong,et al.Aging of HV equipment insulation and realization of condition-based maintenance[J].High Voltage Engineering,1999,25(3):40-42.
[4]周宏伟,刘成华,盖磊,等.一起GIS盆式绝缘子局部放电案例分析[J].电瓷避雷器,2017,23(2):186-190.ZHOU Hongwei,LIU Chenghua,GAI Lei,et al.The partial discharge case analysis of GIS basin insulator[J].Insulators and Surge Arresters,2017,23(2):186-190.
[5]申强,杨海龙,刘航,等.超声波局部放电检测技术在500 kV GIS盆式绝缘子上颗粒缺陷诊断中的应用[J].高压电器,2017,53(9):228-233.SHEN Qiang,YANG Hailong,LIU Hang,et al.Application of ultrasonic partial discharge detection technology on the particle defect diagnosis of a 500 kV GIS basin-insulator[J].High Voltage Apparatus,2017,53(9):228-233.
[6]李军浩,车斌,张亮,等.振荡型雷电冲击电压下SF6气体中悬浮电位缺陷的局部放电特性研究[J].绝缘材料,2014,47(4):63-65.LI Junhao,CHE Bin,ZHANG Liang,et al.Partial discharge characteristics of floating potential defect in SF6Gas under oscillating lightning impulse voltage[J].Insulating Materials,2014,47(4):63-65.
[7]IEC60060-3:2006 High Votage Test Techniques Part 3:Definitions and Requirements for On-site Tests[S].
[8]GB/T 16927.3-2010高电压试验技术第3部分现场试验的定义和要求[S].
[9]李军浩,车斌,韩旭涛,等.特高压气体绝缘组合开关设备现场冲击耐压试验及局部放电测量[J].高电压技术,2015,41(11):3659-3665.LI Junhao,CHE bin,HAN xutao,et al.Field impulse withstand test and partial discharge detection for ultra high voltage gas insulated switchgear equipment[J].High Volt-(上接第50页)age Engineering,2015,41(11):3659-3665.
[10]李军浩,韩旭涛,刘泽辉,等.电气设备局部放电检测技术述评[J].高电压技术,2015,41(8):2583-2601.LI Junhao,HAN Xutao,LIU Zehui,et al.Review on partial discharge measurement technology of electrical equipment[J].High Voltage Engineering,2015,41(8):2583-2601.
[11]LI J H,ZHANG L,LIANG J F,et al.Partial discharge characteristics over SF6/epoxy interfaces under impulse voltage[J].IEEE Transactions on Dielectrics and Electrical Insulation,2013,20(6):2158-2164.
[12]ZHAO X F,YAO X,GUO Z F,et al.Characteristics and development mechanisms of partial discharge in SF6 gas under impulse voltages[J].IEEE Transactions on Plasma Science,2011,39(2):668-674.
[13]ZENG,F P,DONG Y,TANG J.Feature extraction and severity assessment of partial discharge under protrusion defect based on fuzzy comprehensive evaluation[J].IET Generation Transmission&Distribution,2015,9(16):2493-2500.
[14]GAO W S.Analysis of the intrinsic characteristics of the partial discharge induced by typical defects in GIS[J].IEEE Transactions on Dielectrics&Electrical Insulation,2013,20(3):782-790.
[15]DONG Y L.Features extraction and mechanism analysis of partial discharge development under protrusion defect[J].Journal of Electrical Engineering&Technology,2015,10(1):344-354.
[16]ZHAO X F,GUO Z F,LI Y M,et al.Partial discharge characteristics and mechanism in voids at impulse voltages[J].Measurement Science&Technology,2011,22(3):1-7.
[17]吴旭涛,李军浩,张亮,等.振荡型冲击电压下局部放电的检测及干扰分析[J].高压电器,2016,52(4):92-97.WU Xutao,LI Junhoa,ZHANG Liang,et al.PD detection and interference analysis under oscillating impulse voltage[J].High Voltage Apparatus,2016,52(4):92-97.
[18]YU J L,FAN Y D,WANG J G,et al.Characteristics of the horizontal electric field associated with nearby lightning return strokes[J].Journal of Atmospheric and Solar Terrestrial Physics,2017,154:207-216.
[19]SEEGER M,BUJOTZEK M,NIEMEYER L.Formactive time lag and breakdown in SF6 at small protrusions[C].Piscataway:Proceeding of 17th International Conference on Gas Discharges and Their Applications,NJ,IEEE,2008:317-320.
[20]SEEGER M,NIEMEYER L,BUJOTZEK M.Partial discharge and breakdown at protrusions in uniform background fields in SF6[J].Journal of Physics:Applied Physics,2008,41(18):185-204.