论防雷设计中年平均雷暴日和地闪密度的取值  

Values of Annual Average Thunderstorm Days and Ground Flash Density in Lightning Protection Design

作　　者：张学庆 ZHANG Xueqing(Shanghai Electric Power Design Institute Co.,Ltd.,Shanghai 200025,China)

机构地区：[1]上海电力设计院有限公司,上海市200025

出　　处：《建筑电气》2022年第9期19-24,共6页Building Electricity

摘　　要：工程设计中常用年平均雷暴日数据对地闪密度进行推算,结果用于建筑物、电子信息系统和架空输电线路的防雷设计。由于所依据的模型和研究程度不同,形成了指数法、线性划分法等不同的推算方法,而指数法的系数取值又各有不同,导致不同方法的推算结果有着相当大的差异,对防雷设计影响较大。气象部门和电力行业都建立了自己的雷电定位系统,形成了完善成熟的地闪密度分布成果。在此基础上,防雷设计今后完全可以摒弃年平均雷暴日参数,以多年实测的地闪密度作为基础数据,提高防雷设计的科学性和合理性。In engineering design,the annual average thunderstorm day data is often used to calculate the ground flash density.The results are widely applied to lightning protection design of buildings,electronic information systems and overhead transmission lines.In fact,due to the different models and research levels,different calculation methods such as exponential method and linear partition method can be formed.However,the coefficient values of the index method could be very different,which leads to dramatic differences in the calculation results of different methods,thus having a great impact on the lightning protection design.Now,all relevant meteorological departments and electric power industries have built their own lightning positioning systems,which have possessed perfect and mature ground flash density distribution results.On this basis,the lightning protection design will be completely free from any reliance on the parameter of annual average thunderstorm days.Instead,the ground flash density measured over many years can be used as the basic data to make lightning protection design more scientific and rational.

关 键 词：年平均雷暴日 地闪密度 雷电防护 建筑物年预计雷击次数 雷区 雷电定位系统 反击 绕击 

分 类 号：TU895[建筑科学]