丹江电厂工频高压电场工作人员健康调查

Health Survey on Workers Working in Surroundings of the Work Frequency and Electric Field of High Tension in Danjiang Hydropower Station

丹江电厂已建成运行 30周年 ,其变配输电采用 5 0Hz 2 2 0kV、 1 1 0kV和 2 0kV三种电压。2 2 0kV输电线路最高电场强度 0 4kV/m ,磁感应强度 1 4mG (1 4× 1 0 -3 mT) ;1 1 0kV输电线路最高电场强度 0 2kV/m ,磁感应强度 6mG (6× 1 0 -4 mT) ;2 0kV输电线路最高电场强度 0 0 8kV/m ,磁感应强度1 9mG (1 9× 1 0 -4 mT)。变配电设备周围最高场强 (2 2 0kV) 5kV/m ,磁感应强度 1 0～ 80mG (1× 1 0 -3～ 8× 1 0 -3 mT)。该环境中工作人员自觉症状与对照组有显著性差异 ,而临床测试和实验室检查未发现与对照组存在显著性差异。由此提示该工频电场环境可引起正常作业人体一些自觉症状 ,但健康检测数值没有超出允许值范围。

Danjiang Hydrpower Station has been running for 30 years,transforming,distributing and sending electricity of 50 Hz 220 kV,110 kV and 20 kV.The highest electric field intensity(220kV)of the electric line of transmission is 0 4 kV/m and the magnetic induction intensity is 14 mG(1 4×10 -3 mT).The highest electric field intensity(110 kV) of the electric line of transmission is 0 2 kV/m and the magnetic induction intensity is 6 mG(6×10 -4 mT).The highest electric field intensity (20 kV)of electric line of transmission is 0 08 kV/m and the magnetic induction intensity is 1 9 mG(1 9×10 -4 mT).The highest electric field intensity around the electricity transformation and distribution equipment(220 kV)is 5 kV/m and the magnetic induction intensity is 10～80 mG(1×10 -3 ～8×10 -3 mT).The workers working in above surroundings have more subjective symptoms than those of controls,but no obvious difference has been found between these two groups when they are given clinical examination and lab tests.So,it could be concluded that some subjective symptoms may be induced for workers working in this surroundings,however,the findings of physical examination do not exceed the normal value.