高压、超高压输送变配电站工频电场检测结果分析

Monitoring analysis of power frequency electric field in high pressure and ultra- high voltage transmission sub- station

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 level of power frequency electric field in the high pressure and ultra - high volt- age transmission substation, analyze the routine monitoring reports. Methods The field investigation was carried out , according to the current national occupational standard. Results 172 operating points of power frequency electric field were detected in fifteen 220 kV high voltage transmission substations, 15 operation points exceeded the requirements of national exposure limits, the qualified rate was 91.28%. 43 of 147 operation points of power frequency electric field exceeded the value of national exposure limits in fifteen 500 kV EHV transmission substations, the qualified rate was 70. 75%. Conclu- sion There have different intensities of power frequency electric field in the work environment of high press and ultra high voltage transmission substations. Occupational hazards should be paid attention , and individual protection should be strengthened in order to control occupational hazards effectively.