海拔高度对云南某地雷电参数的影响

针对云南省某地雷电定位系统所统计的地面落雷信息缺乏海拔高度属性,无法分析海拔高度对雷电参数影响的情况,结合雷电定位系统和Global Mapper分析软件,分析了该地区雷电流参数与海拔高度的关系。利用先进星载热发射和反射辐射仪全球数字高程模型(ASTER GDEM)获取了地面落雷点的海拔高度属性,分析了地面落雷点的雷电流幅值、雷电回击次数、地闪密度、正极性雷在总落雷次数中所占比例等因素随海拔高度的变化关系,得出了该地区雷电参数随海拔高度变化的规律,为该地区电网设计和防雷改造提供了参考。

Effects of Elevation on Lightning Parameters in Yunan Province

The impact of elevation on lightning current parameters could not be analyzed in Yunnan Province due to the lack of elevation data in thunderbolt information obtained by lightning location system.In this paper,lightning location system and Global Mapper analysis software were used to investigate the relationship between lightning current parameters and elevation.Based on the elevation data in thunderbolt place obtained by advanced spaceborne thermal emission and reflection global digital elevation model（ASTER GDEM）,the relations between elevation and lightning peak current,return stroke times,cloud-to-ground flash density or positive lightning proportion in thunderbolt were analyzed.The research presents a law of lighting parameters and elevation,which could provide references for power grid design and lightning protection alteration.