北京市工频电磁环境调查研究
Investigation of the Power Frequency EMF of Beijing
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。
关键词 电磁环境、工频、网格法、电磁辐射
Abstract 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 LF 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 is match with the location of
passageway of overhead high-voltage transmission line in Beijing. It indicates that the
high-voltage transmission line are source of the 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.
Keywords electromagnetic environment, power frequency, grid method,EMF.