海拔高度对雷电流参数的影响  

Effect of Altitude on the Parameters of Lightning Current

作　　者：吴安坤[1,2] 张逸 曾勇[1] 吴仕军[1] 刘芸[1] 

机构地区：[1]贵州省防雷减灾中心,贵阳550081 [2]成都信息工程大学大气科学学院,成都610225 [3]铜仁市气象局,贵州铜仁554300

出　　处：《电瓷避雷器》2016年第6期166-170,共5页Insulators and Surge Arresters

摘　　要：雷电流参数作为雷电理论研究以及工程防护应用的基础,海拔高度变化对其影响不容忽视。为此,采用星载热发射和反射辐射仪全球数字高程模型(ASTER GDEM)数据,填补闪电监测数据中缺乏的海拔信息,分析海拔高度变化对雷电流幅值、闪击频次、闪击密度、陡度等雷电流参数的影响。以贵州为例,提出幅值、陡度随海拔变化的拟合公式的同时,得到的结果:同一海拔高度的正极性雷电流幅值及陡度高于负极性,且随着海拔的上升,差值越大;正极性雷电流幅值、陡度随海拔上升而增大,负极性雷电流幅值、陡度随海拔上升而减小;在一定范围内,海拔高度对单位面积内的闪电频次数起主导作用。Lightning current parameters as lightning protection theory research and engineering application of the foundation, under the influence of surface elevation changes to it cannot be ignored. In order to analyze the influence of altitude on lightning current amplitude, frequency, lightning stroke density, steepness of lightning current parameters, advanced spaceborne thermal emission and reflection radiometer global digital elevation model is used to fill the lack of lightning monitoring data of elevation information. Taking Guizhou as an example, amphtude and steepness with fitting formula of elevation change, and proposes the following result： the same altitude height positive lightning current amplitude and steepness are higher than the negative＇s, and the greater the difference with increasing altitude; Positive lightning current amplitude, steepness with altitude rising and increased negative lightning current amplitude, steepness decreases with increasing elevation; In a certain range, altitude on unit area of the number of lightning frequency plays a leading role.

关 键 词：海拔 雷电流幅值 雷电流陡度 地闪密度 

分 类 号：TM863[电气工程—高电压与绝缘技术]