基于ADTD系统的雷电流波头陡度频率分布特征  

Distribution Characteristics of Lightning Current Wave-Head Gradient Based on ADTD System

作　　者：李家启[1,2] 李博[1] 申双和[1] 王劲松[3] 李良福[2] 

机构地区：[1]南京信息工程大学应用气象学院,南京210044 [2]重庆市气象局,重庆410047 [3]国家卫星气象中心,北京100081

出　　处：《气象科技》2010年第6期741-745,共5页Meteorological Science and Technology

基　　金：公益行业专项(GYHY(QX)2007-6-22 4);重庆市科技攻关项目"重庆市轻轨防雷技术研究";重庆市建设科研项目(城科字第51号)资助

摘　　要：通过对ADTD闪电定位系统2006 2008年在重庆地区监测的729598次闪电进行统计,重点分析雷电流陡度的频率分布特征。结果表明:雷电流波头陡度及其频率随极性不同而差异较大,正闪陡度明显大于负闪陡度,而同陡度负闪频率却显著大于正闪;雷电流幅值与陡度相关系数为+0.613;采用电力行业标准DL/T620推荐波头时间反推得到的雷电流陡度和采用Ciger推荐公式计算得到的雷电流陡度的概率分布特征与统计特征差异较大。在此基础上分析了ADTD系统获取雷电流陡度资料的局限性,为合理选取雷电流陡度参数提供理论依据。The lightning current amplitude and gradient are significant in the fundamental researches of lightning protection and science.A statistical analysis is made of 729598 lightning flashes monitored by the ADTD lightning location system in Chongqing between 2006 and 2008,with focus on the analysis of the distribution characteristics of lightning current gradient and frequency.The results show that the lightning wave-head gradient and frequency are different with different polarities;the gradient of positive lightning is obviously greater than that of negative lightning,and the frequency of negative lightning is obviously greater than that of positive lightning at the same gradient;the correlation coefficient between lightning current amplitude and gradient is ＋0.613;there is great difference between the probability-distribution characteristics,as well as the statistical characteristics,of the lightning gradients calculated by the DL/ T620-recommended wave-head time and that calculated by the CIGER-recommended formula.Based on these findings,the limitations of lightning current gradient obtained by the ADTD system are analyzed, which offers theoretical evidences for the right selection of lightning gradient parameters.

关 键 词：雷电流陡度 幅值 相关系数 波头时间常数 

分 类 号：TM726[电气工程—电力系统及自动化]