输电走廊工频电磁场的测量和解决方案  

Electromagnetic Field Intensity Measurement and Solution for Unsafe Environment along Transmission Lines

作　　者：熊兰[1] 宋道军[1] 张又力 唐涛[3] 肖波[2] 杨帆[1] 何为[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030 [2]重庆市电力公司城区供电局,重庆402760 [3]四川电力公司宜宾电业局,宜宾644000

出　　处：《高压电器》2011年第8期97-101,共5页High Voltage Apparatus

基　　金：中央高校基本科研业务基金(CDJRC10150008)~~

摘　　要：随着超高压电网的迅速发展,输电线路走廊的电磁辐射问题引起越来越多的关注。结合工程实例—某500 kV交流线路靠近小学校园引起师生身体不适,运用模拟电荷法和模拟电流法,分别分析了该线路走廊的工频电场和工频磁场的空间分布特性。同时,现场测量数据表明:在晴朗天气条件下,教学楼顶部分区域的电场强度接近国标限值;在阴雨(湿度较大)天气条件下,电场强度确已超标。针对电场超标问题,通过架设3根LGJ-50/30接地屏蔽线将电场强度最大值由3.75 kV/m降至1.35 kV/m,阴雨天气条件下亦满足国家标准要求。With the development of extra high voltage power grid, electromagnetic radiation arouses people＇s intensive concern. With an engineering example： physical discomfort of teachers and students in primary school near a 500 kV AC transmission lines, distribution of power frequency electric field and power frequency magnetic field under the lines is analyzed with program based on charge simulation method （CSM） and simulation current method （SCM） respectively. Moreover, measured data indicate that electric field intensity on the roof of the teaching building partially approaches national public exposure limit in good weather condition; it exceeds the limit in bad weather condition （high relative humidity）. The solution proposal for unsafe electric field environment is to fix three shielding lines （LGJ-50/30） to reduce electric field strength from 3.43 kV/m to 1.35 kV/m. Even in rainy weather condition, electric field strength also meets the national standards＇ request.

关 键 词：输电线路 模拟电荷法 模拟电流法 电场 磁场 安全 

分 类 号：TM151[电气工程—电工理论与新技术]