摘要
变电站周围的工频磁场分布关系到职业曝露、公众曝露和对敏感电子设备的干扰等3个方面的问题。分析了变电站磁场源特性,介绍了用自编MATLAB计算程序,通过数值计算分析国家电网公司典型设计220kV变电站周围工频磁场分布及其特征的方法。计算分析结果表明,国家电网公司典型设计变电站站界外的工频磁场水平远低于公众曝露标准限值,变电站内的磁场水平远低于职业曝露标准限值。
The distribution of power frequency magnetic field in or around substations involves the problem of exposure to professionals, public, sensitive electronic devices. This paper analyses the numeric calculation method of space magnetic field around substations,and analyses the distribution and characteristic of power frequency magnetic field around typical 220 kV substation designed in accordance with State Grid Company＇s requirements by calculation program using MATLAB. The results of calculation show that the level of power frequency magnetic field around this typical substation is far lower than the limit value of exposure to public and the level of magnetic field in this typical substation is far lower than the limit value of exposure to professionals.
出处
《供用电》
2007年第6期1-4,共4页
Distribution & Utilization
关键词
220KV变电站
工频磁场
数值计算方法
职业曝露
公众曝露
220 kV substation
Power frequency magnetic field
Numeric calculation method
Exposure to professionals
Exposure to public
