| 摘要: |
| 为研究揭阳地区雷电流幅值特征，本文利用2017－2020年揭阳地区雷电流数据，通过数理统计和matlab拟合工具箱，研究分析了雷电流幅值时间分布规律及幅值累积概率特征。结果表明：近4年揭阳地区共发生地闪回击62806次，其中0－200 kA幅值的回击次数占比约为99.81 %，正、负地闪回击频次随雷电流幅值变化整体呈现先增加后减少趋势。正地闪回击幅值大值区月份出现在3月和11月，负地闪回击幅值大值区月份为3月和10月，随着季节的推移，正地闪回击幅值大值区的出现时段逐渐推迟；负地闪回击电流幅值的大值区多出现在00:00－10:00。对比分析了IEEE和DL/T幅值累积概率推荐公式曲线，IEEE推荐公式曲线与实际值分布曲线基本重合，并得出了揭阳地区雷电流幅值累积概率拟合公式，与实际值的误差值介于-0.006－0.0005，为揭阳地区的防雷减灾工作提供参考。 |
| 关键词: 雷电流幅值；分布特征；累积概率分布；曲线拟合 |
| DOI： |
| 投稿时间：2021-12-13修订日期：2022-02-23 |
| 基金项目: |
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| Characteristics of lightning current amplitude and analysis on the cumulative probability formula in Jieyang |
| HuangYangdong,ZhuWensheng,Zhang Manxia,XiaYun |
| (Jiexi Meteorological Bureau;Shanwei Meteorological Bureau;Huilai Meteorological Bureau;Jieyang Meteorological Bureau) |
| Abstract: |
| In order to study the characteristics of lightning current amplitude in Jieyang area, using the lightning current data in Jieyang area from 2017 to 2020, this paper studies and analyzes the time distribution law and cumulative probability characteristics of lightning current amplitude through mathematical statistics and MATLAB fitting toolbox. The results show that a total of 62806 ground lightning return strokes have occurred in Jieyang area in recent 4 years, of which the return stroke times with amplitude of 0-200 Ka account for about 99.81%. The return stroke frequencies of positive and negative ground lightning first increase and then decrease with the variation of lightning current amplitude. The months of the high value area of positive lightning return amplitude appear in March and November, and the months of the high value area of negative lightning return amplitude are March and October. With the passage of season, the emergence period of the high value area of positive lightning return amplitude is gradually delayed; The large value area of negative lightning return current amplitude mostly appears in 00:00-10:00. The IEEE and DL / T amplitude cumulative probability recommended formula curves are compared and analyzed. The IEEE recommended formula curve basically coincides with the actual value distribution curve, and the lightning current amplitude cumulative probability fitting formula in Jieyang area is obtained. The error value between the IEEE recommended formula curve and the actual value is -0.006-0.0005, which provides a reference for lightning protection and disaster reduction in Jieyang area. |
| Key words: lightning current amplitude; distribution characteristics; cumulative probability distribution; curve fitting |
