重庆地区雷电流幅值变化特征分析  

Analysis of the Lightning Current Amplitude Change Characteristics in Chongqing Area

作　　者：李家启[1] 申双和[1] 廖瑞金[2] 李博[1] 魏长明 李良福[4] 

机构地区：[1]南京信息工程大学,南京210044 [2]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 [3]重庆电力科学试验研究院,重庆401123 [4]重庆市气象局,重庆401147

出　　处：《高电压技术》2010年第12期2918-2923,共6页High Voltage Engineering

基　　金：公益行业专项(GYHY(QX)2007-6-22-4)~~

摘　　要：雷电流幅值及其特性是雷电科学研究的重要基础数据。为此利用闪电定位系统监测到的重庆区域内地闪资料(1999～2008年),统计分析了重庆地区1999～2003年、2003～2008年正闪和负闪雷电流幅值的时间变化和空间分布变化特征。结果表明:正(负)闪雷电流幅值在2003～2008年明显高于1999～2003年,其中秋季增幅最大,冬季相对比例增加最大;相对于1999～2003年,春季和夏季雷电流幅值在东部地区减少,西部增加显著;秋季各地区都呈现一致增加趋势(仅渝中区正闪略有减少);冬季在位于重庆市主城区及其偏东区域,1999～2003年未发生闪电,而2003～2008年闪电明显增加,东部地区正闪呈现增加趋势,负闪呈现减少趋势。在此基础上,获得了1999～2003年和2003～2008年雷电流幅值的累积概率分布方程,客观反映了重庆地区雷电流幅值变化规律。Lightning current amplitude and its features are an important basis for lightning research.The time changes and space distribution features of lightning current amplitude of the positive and negative flash（1999～2003and 2003～2008）in Chongqing are analyzed by using the monitoring data of lightning location system in the same area（1999～2008）.The results show that positive（negative）flash current amplitude from 2003to 2008（later period）is significantly higher than that from 1999to 2003（earlier stage）,the biggest increase is in autumn and the largest increase of the relative proportions in winter.Compared to that in the earlier stage,the lightning current amplitude reduces in the east area while significantly increases upstream in the west area.All regions in autumn show the consistent upward trend（only a slight decrease for positive flash in Yuzhong District）.In winter,the lightning does not appear in the earlier stage,however it significantly increases in the later period in Chongqing and its adjacent east areas.There is an increasing trend for the positive flash,while the opposite trend for the negative flash in east region.Accordingly,the cumulative probability distribution equation of the lightning current amplitude can be obtained,and objectively reflects the change rules of lightning current amplitude in Chongqing area.

关 键 词：重庆地区 雷电流幅值 变化规律 特征 累积概率 雷电参数 

分 类 号：TM861[电气工程—高电压与绝缘技术]