摘要
针对公众及环境管理部门对城市工频电磁环境的认知缺乏总体基础数据的现状,运用网格法监测调查了北京市建成区域的工频电磁环境。监测结果的统计分析表明:北京的工频电磁环境良好,工频电场和工频磁场均远小于我国电磁环境标准的限值。在这基础上绘制出了北京市的工频电磁环境浓度分布图,该分布图与北京市高压走廊分布图有很好的吻合,证明了城市主要的工频污染来自于架空高压输变电设施。为公众及环境管理部门认知北京市的工频电磁环境提供了最直接的数据,为国家电磁环境基础数据库积累了基础数据。
To provide more basic data about the power-frequency（PF） electromagnetic field（EMF） of the city for the general public and the environment management department,the PF EMF of Beijing city are studied by grid method.The measurement result shows that PF EMF in Beijing is very good.The PF E-field and H-field is very small compared with the limits of environmental standard.The map of PF EMF distribution of Beijing is drawn.The pattern of equipotentials matches with the location of passageway of overhead high-voltage transmission line in Beijing.It indicates that the high-voltage transmission lines are the source of PF EMF.The first hand data about PF EMF to the general public and the environment management department are provided,which is the basic data for the State＇s electromagnetic environment database.
关键词
电磁环境
工频
网格法
电磁辐射
electromagnetic environment
power frequency
grid method
EMF
