重庆库区地貌1999—2008雷电流幅值频率分布特征  

Distribution Characteristics of the Lightning Current Amplitude and Frequency in Chongqing Reservoir Landform During 1999—2008

作　　者：李家启[1,2] 王劲松[3] 廖瑞金[4] 申双和[1] 李博[1] 

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401147 [3]国家卫星气象中心,北京100081 [4]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030

出　　处：《高电压技术》2011年第5期1123-1128,共6页High Voltage Engineering

基　　金：国家公益行业专项(GYHY(QX)2007-6-22-4)~~

摘　　要：雷电流的幅值及其特性是雷电科学研究的重要基础数据。通过对1999—2008年重庆地区地闪监测资料中雷电流幅值测量数据的数理统计和对数正态分布拟合,重点分析其频率分布特征。结果表明:雷电流幅值频率分布特征随闪电极性具有显著差异,负闪雷电流幅值出现频次满足对数正态分布,并通过显著性检验,可以用对数正态分布曲线很好地拟合其分布特征;正闪的雷电流幅值不符合对数正态分布,而是符合双对数正态函数叠加分布特征。在此基础上,获得了重庆库区地貌的雷电流幅值的概率密度分布曲线方程,它客观地反映了重庆地区雷电活动规律,相对于IEEE工作组给出的雷电参数,该参数能更为准确地为重庆地区这种典型库区地貌区域的城市规划和防雷减灾活动提供了理论依据。On the basis of ground flash observation data,the lightning current magnitude and its frequency distribution characteristics were analyzed.The results showed that,the frequency distribution characteristics were markedly different between positive and negative lightning.The frequency distribution of negative lightning current magnitude conformed to the logarithmic normal distribution significantly,so the log-normal distribution curve could be fitted very well to the distribution characteristics.However,the frequency distribution of positive lightning conformed to the double log-normal distribution rather than the logarithmic normal distribution.The distribution characteristics of positive lightning current magnitude in a lower level were similar to those of the negative lightning.The curve equation of the lightning current magnitude frequency distribution objectively reflected the lightning activities in Chongqing district.Compared with the lightning parameters given by IEEE work team,the parameters can provide a theoretical basis for the city planning and lightning protection more exactly in such typical Reservoir landform of Chongqing.

关 键 词：对数正态分布 雷电流幅值 频率分布 累积概率 特征 雷电参数 

分 类 号：TM863[电气工程—高电压与绝缘技术]