大型发电厂工频电场污染及不同电压等级输电线电场分布的调查

The pollution of extremely low frequency field in great power plants and distribution of electric field in transmission line with different voltage grade

目的 了解我省大型发电厂和不同电压等级输电线下电磁场对周围环境的污染情况。方法 对发电机组主控室、网控室、变电设备、高压输出 (TB)区等作业场所的工频电场场强和高压输出电线下的电场分布情况进行了测量。结果 发现输电线下、高压输出 (TB)区、非全封闭式变压器和启备变压器周围均测出不同强度的工频电场 ,尤其是高压TB和变压器为最高。某些测点超过了国家有关工频作业场所 5kV/m的卫生标准允许值。

Objective To explore the pollution of electric field in the environment of great power plants and distribution of electric field in transmission line with different voltage grade. Methods Electric field intensities were measured at the controlling center of generating sets, netting control rooms, transformer equipments and high voltage transmitting TB region also in transmission line with different voltage grade. Results Various intensities of electric field were found in the transmission line, high voltage transmitting TB region, transformer equipment, unclose transformer and supplemental transformer. High values were found in high voltage transmitting TB region and transformers particularly. Some values even exceeded hygiene norm on workplace, i.e. 5 kV/m.Conclusion It showed that some workers might expose to the intensive electric field.