利用落雷密度划分重庆雷区的研究

为利用落雷密度划分重庆雷区分布,在统计分析了雷电定位系统5年来收集的重庆地区雷电定位数据后,提出了更能客观、准确反应地区雷电活动强弱的落雷个数/(km2·a)作为划分重庆地区雷电活动强弱的标准。利用重庆电网雷电定位系统运行5年积累的数据,绘制了重庆地区雷区分布电子地图,方便了防雷计算,为研究雷电活动提供了一个新思路,为输电线路进行防雷设计和改造提供了依据。

Research on the Thunder Distribution in Chongqing Region Using Ground Flash Density

Considering the working situation of LLS in Chongqing province in recent years and the existing regulation, Ground Flash Density can reflect the activity of lightning exactly, so a principle is presented to show the thunder distribution in Chongqing region. Based on this principle, the lightning data obtained by LLS are measured in grids with 2km width, and the ground flash per year is calculated in every grids automatically. Each grid is drawn with different colour, according to the level of the different annual ground flash density, so thunderstorm distribution electronic map of Chongqing region is programmed by this way. With the improvement of measuring precision and efficiency and more data accumulated, it is very convenient to adjust this electronic map, and to make the differentiation for thunder distribution more practical. When the transmission line is to be designed, the transmission line should be decided according to the lighting activity distribution observed from this electronic map. Then the lightning protection design of electrical pole is also decided considering the landform and physiognomy. The lightning protection design in the rebuilding of the current transmission line can also consult the lightning activity in the line corridor from the electronic map.