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目的了解高压、超高压输送变配电站工频电场强度水平,对高压、超高压输送变配电站工频电场日常检测评价报告进行分析。方法采取现场职业卫生学调查,根据国家现行职业卫生标准进行职业病危害因素检测。结果测15家220 k V高压输送变电站工频电场强度172个作业点,15个作业点工频电场强度超过国家接触限值的要求,合格率为91.28%。测15家500 k V超高压输送变电站工频电磁场强度147个作点,43个作业点工频电磁场强度超过国家接触限值的要求,合格率为70.75%。结论高压、超高压输送变配电站的工频电场作业环境存在不同强度的工频电场,高压、超高压输送变配电站职业病危害不容忽视,应加强个体防护,有效控制职业病危害因素。
Objective To understand the power frequency electric field strength of high voltage and ultrahigh voltage power transmission substations and analyze the daily power frequency electric field daily high voltage and ultrahigh voltage transmission substation power station test reports. Methods Occupational health survey was conducted on the spot and the occupational hazards were tested according to the current national occupational health standards. Results The power frequency electric field intensity of 15 220 kV high voltage transmission substations was measured at 172 operating points. The power frequency electric field intensity of 15 operating points exceeded the national contact limit requirements, with a pass rate of 91.28%. The frequency of 150kV 500kV UHV transmission substation frequency electromagnetic field strength measured 147 points, 43 operating point power frequency electromagnetic field strength exceeds the national exposure limit requirements, the passing rate of 70.75%. Conclusion There are different frequency electric fields with different frequencies in high frequency and ultrahigh voltage power transmission substations. Occupational hazards of high voltage and ultrahigh voltage transmission substations should not be neglected. Individual protection should be strengthened to effectively control occupational hazards.