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| 基于地闪数据的雷电流幅值累积频率公式探讨 | |
| 引用本文： | 冯志伟,肖稳安,马金福,虞进.基于地闪数据的雷电流幅值累积频率公式探讨[J].气象科技,2012,40(1):137-140. |
| 作者姓名： | 冯志伟 肖稳安 马金福 虞进 |
| 作者单位： | 1. 南京信息工程大学,南京210044;浙江省湖州市气象局,湖州313000 2. 南京信息工程大学,南京,210044 3. 浙江省湖州市气象局,湖州,313000 |
| 基金项目： | 湖州市科技局2008年攻关课题“湖州地区（南太湖）雷电活动特征及监测防御研究”（2008GS10）资助 |
| 摘 要： | 利用2007年和2008年浙江省气象部门闪电定位系统的地闪监测数据,应用Matlab数学软件中的曲线拟合工具箱,以最小二乘法原理对IEEE推荐公式和我国规程推荐公式进行最优化拟合,得出前者拟合效果优于后者的结论。通过分析IEEE推荐公式计算结果与实际值之间的相对误差,发现正闪雷电流幅值累积频率在(1kA,270kA)范围内相对误差绝对值较小,最大不超过10%;而负闪雷电流幅值累积频率在(-1kA,-300kA)范围内相对误差绝对值较大,最大值约为38%。针对上述情况,利用数学软件拟合出负闪(-1kA,-300kA)相对误差曲线的近似函数,修正了原累积频率公式,大幅度减小了其相对误差。其适用范围也从原来的(2kA,200kA)放宽至正闪(1kA,270kA)、负闪(-1kA,-300kA)。 |
| 关 键 词： | 闪电定位系统 雷电流幅值 累积频率 |
| 收稿时间： | 2010/8/12 0:00:00 |
| 修稿时间： | 2010/12/13 0:00:00 |
Cumulative Frequency Formulas of Lightning Current Amplitude Based on Ground Lightning Data |
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| Feng Zhiwei,Xiao Wenan,Ma Jinfu and Yu Jin.Cumulative Frequency Formulas of Lightning Current Amplitude Based on Ground Lightning Data[J].Meteorological Science and Technology,2012,40(1):137-140. | |
| Authors: | Feng Zhiwei Xiao Wenan Ma Jinfu and Yu Jin |
| Institution: | 1 Nanjing University of Information Science ＆ Technology,Nanjing 210044; 2 Huzhou Meteorological Service,Zhejiang,Huzhou 313000) |
| Abstract: | The fitting formulas recommended by IEEE and the related departments in China are studied with the least square method,by means of the monitoring data of the lightning location system over Zhejiang in 2007 and 2008,as well as the curve fitting toolbox in Matlab.It is found that the former fits better than the latter.Through analyzing the relative errors of the calculated results of the IEEE formula and the observed values,it is found that the cumulative frequency of positive lightning current amplitude is smaller than 10%;but the cumulative frequency of negative lightning current amplitude is big in the range of-1 kA to-300 kA,with the maximum being about 38%.In response to these circumstances,the approximate function of the relative error curve fitted by mathematic software is presented,and the original cumulative frequency formula is corrected.The relative errors are significantly reduced.The application range of the formula can be enlarged from original（2 kA,200 kA） to（1 kA,270 kA） for positive lightning and（-300 kA,-1 kA） for negative lightning. |
| Keywords: | lightning location system lightning current amplitude cumulative frequency |
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