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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 Power Plant has been put into operation for 30 years, with variable transmission 50Hz 220kV, 110kV and 20kV three kinds of voltage. The maximum electric field strength of 220kV transmission line is 0 4kV / m and the magnetic induction intensity is 14mG (14 × 10 ~ 3 mT). The highest electric field intensity of 110kV transmission line is 0 2kV / m and the magnetic induction intensity is 6mG (6 × 10 ~ 4 mT). The highest electric field strength of 0 0kV transmission line is 0 0 8kV / m and the magnetic induction intensity is 1 9mG (1 9 × 1 0 -4 mT). The highest field strength around the power distribution equipment (220kV) is 5kV / m and the magnetic induction is 10 ~ 80mG (1 × 10 ~ 8 ~ 10 × 10-3mT). There was a significant difference between the subjective symptom of staff in the environment and the control group, but there was no significant difference between the clinical test and laboratory test in the control group. This suggests that the power frequency electric field environment can cause some normal symptoms of the body, but the health test values did not exceed the allowable value range.