摘要
雷电活动时空分布是防雷工程中重要的基础资料,可以为输电线路选择有效的防雷措施提供参考依据。为此基于湖南省雷电定位系统(LLS)2002～2008年的雷电数据库,通过统计不同时间段和区域内的地闪次数和雷电流幅值,得到了湖南省雷电活动的时空分布特征。同时利用地理信息系统(GIS)和网格法得到了湖南省地闪密度分布图和雷电日分布图。统计结果表明:湖南省雷电活动在不同时间段和区域内的落雷次数和雷电流幅值雷击概率分布差异明显;雷电日分布与地闪密度分布通过多年累积数据分析后发现有较强的相似性,并依此得到了湖南省雷电日推算地闪密度的经验公式。
Spatial and temporal distribution of lightning activity is the basic information of lightning protection engineering,and it can provide a reference to choose effective lightning protection measures of transmission line. In this paper,the lightning statistical data based on the Lightning Location System （LLS） in Hunan province are from 2002 to 2008. By the statistics of the ground flashes and lightning current magnitude in different time and different regions,the spatial and temporal distribution characteristics of lightning activity is obtained. The maps of flash density and flash day in Hunan are obtained by Geographic Information System （GIS） and grids method. The results show that the differences of the flash times and the cumulative probability of lightning current magnitudes in different time and regions are remarkable. The correlation between flash density and flash days is significant,and an empirical formula is presented.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2010年第4期932-938,共7页
High Voltage Engineering
关键词
时空分布
地闪密度
雷电日
雷电流幅值累积概率
相关性
雷电定位系统
spatial and temporal distribution
ground flash density
flash days
cumulative probability of lightning current magnitude
correlation
lightning location system
