10 kV配电避雷器整体大电流冲击耐受特性试验研究
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摘要
配电避雷器是一种重要的过电压保护装置。4/10μs大电流冲击试验是用于检验避雷器在遭受直击雷时的可靠性,是确保避雷器安全可靠运行的重要考核指标。本文试验选取了5个厂家的避雷器进行整只4/10μs大电流冲击耐受试验,检测其在大电流冲击作用后是否失效,试验结果表明,10 kV整只避雷器4/10μs冲击大电流冲击耐受能力较差,所有厂家的试品都不满足国标GB/T 11032-2010的相关规定和要求,其中两个厂家避雷器在试验过程中发生爆裂,其余3个厂家避雷器在试验后,其U_(1mA)大幅降低,对应0.75倍U_(1mA)下的泄漏电流急剧增大。整只避雷器开展的大电流冲击耐受特性试验更能检验现场运行的避雷器的实际性能,应该加强对整只避雷器在投入运行前的大电流冲击耐受检测。
Distribution arrester is an extremely important overvoltage protection device. The 4/10 μs high current impulse test is used to test the reliability of a lightning arrester in the case of a direct lightning strike, is to ensure the safe and reliable operation of the arrester important assessment indicators. In this paper, five manufacturers entire arrester are selected to carry out the 4/10 μs high current impulse withstand test to test whether the failure occurred after test. The test results show that the 10 kV whole arrester 4/10 us high current impulse withstand are poor, five manufacturers of the test products cannot meet the requirements of the national standard GB/T 11032-2010, in which two manufacturers arrester during the test occurred in the burst, the remaining three manufacturers arrester in the test after its U_(1 mA)significantly reduced, corresponding to 0.75 times U_(1 mA), The leakage current increases dramatically. The entire arrester to carry out the high current impulse withstand test more reflect the field operation of the arrester, should strengthen the high current impulse withstand test of entire arrester.
Distribution arrester is an extremely important overvoltage protection device. The 4/10 μs high current impulse test is used to test the reliability of a lightning arrester in the case of a direct lightning strike, is to ensure the safe and reliable operation of the arrester important assessment indicators. In this paper, five manufacturers entire arrester are selected to carry out the 4/10 μs high current impulse withstand test to test whether the failure occurred after test. The test results show that the 10 kV whole arrester 4/10 us high current impulse withstand are poor, five manufacturers of the test products cannot meet the requirements of the national standard GB/T 11032-2010, in which two manufacturers arrester during the test occurred in the burst, the remaining three manufacturers arrester in the test after its U_(1 mA)significantly reduced, corresponding to 0.75 times U_(1 mA), The leakage current increases dramatically. The entire arrester to carry out the high current impulse withstand test more reflect the field operation of the arrester, should strengthen the high current impulse withstand test of entire arrester.
引文
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[10]颜旭,陈绍东,江润志,等.自然雷电下氧化锌避雷器残压特征分析[J].中国电力,2013,46(7):72-76.YAN Xu,CHEN Shaodong,JIANG Runzhi,et al.Analysis on characteristics of residual voltage in ZnO SPD based on natural lightning[J].Electric Power,2013,46(7):72-76.
[2]彭向阳.广东线路避雷器防雷效果及运行分析[J].电瓷避雷器,2010(2):21-25,29.PENG Xiangyang.Analysis on lightning protection effects and operationof line arresters in Guangdong power grid[J].Insulators and Surge Arresters,2010(2):21-25,29.
[3]交流无间隙金属氧化物避雷器:IEC 60099-4:2009[S].
[4]中华人民共和国国家质量监督检验检疫总局.交流无间隙金属氧化物避雷器:GB 11032-2010[S].北京:中国标准出版社,2010.
[5]彭发东,彭向阳,熊易,等.广东电网10kV配网避雷器运行状态分析与评估[J].高压电器,2011,47(12):56-61.PENG Fadong,PENG Xiangyang,XIONG Yi,et al.Running status analysis and assessment of 10 kV arresters in Guangdong power grid[J].High Voltage Apparatus,2011,47(12):56-61.
[6]李小建.金属氧化物避雷器电流基本参数分析[J].高电压技术,2008,34(1):37-40.LI Xiaojian.Analysing the basic parameters of currnts of metal oxide surge arreseter[J].High Voltage Engineering,2008,34(1):37-40.
[7]BERAHIM K H S.Effect of multiple lightning strikes on the performance of ZnO lightning arrester block[J].High Voltage Engineering,2011,37(11):2763-2771.
[8]Harmonic characteristics of leakage currents of ZnO varistors under impulse aging ZnO varistor harmonic characteristic surge protection leakage current[J].IEEE Transaction on Power Delivery,2017,32(4):1758-1765.
[9]瞿佥炜,戴明秋,李瑞海,等.配网线路避雷器电阻片90/200μs冲击电流耐受特性试验[J].南方电网技术,2015(7):46-51.QU Qianhui,DAI Mingqiu,LI Ruihai,et al.Withstand performance test of Arrester varistors at distribution network line under 90/200μs impulse current[J].Southern Power System Technology,2015(7):46-51.
[10]颜旭,陈绍东,江润志,等.自然雷电下氧化锌避雷器残压特征分析[J].中国电力,2013,46(7):72-76.YAN Xu,CHEN Shaodong,JIANG Runzhi,et al.Analysis on characteristics of residual voltage in ZnO SPD based on natural lightning[J].Electric Power,2013,46(7):72-76.