摘要
为了解高压输电线对于附近居民电磁环境的影响,采用具有定时测量及数据输出功能的PMM 8053A General Purpose Field Meter,配合EHP-50A型探头在5Hz～100kHz频率范围内实地测量了3个地区高压输电线附近居民室内电、磁场分布并分析了高压输电线附近不同类型居民住宅室内电、磁场的分布特点和不同建筑物对工频电、磁场的屏蔽效能。结果表明,高压输电线对于居民室内工频电、磁场的影响,随着建筑物与输电线距离的增大而迅速减小;不同类型的建筑物对于高压输电线产生的工频电、磁场的屏蔽作用不同。
The domestic electric and magnetic fields （EMF） of three different locations, between 5 Hz- 100 kHz, caused by the nearby high voltage transmission line, are examined with a PMM 8053A General Purpose Field Meter, which has the ability of timing measurement and data output, together with Probe EHP-50A. Firstly, the results of previous relevant studies, the methods of measurement as well as the reference levels for safe general public exposure are presented. Accordingly, the measurement design is determined. Secondly, the results of the electric and magnetic-field for above-mentioned locations, where the measurements have been carried out, are evaluated. The measured data are much less than the limit value 4 kV/m and 100 μT according to the technical evaluating regulation of electromagnetic environment of 500 kV EHV transmission and substation project. Finally, based on the evaluation of these results, according to the safe guidelines, some conclusions are drawn as follows ： The influence of the high-voltage transmission line on the domestic electric and magnetic fields reduces with the increase of the distance between them; The shielding efficiency of structures for power frequency electric field is outstanding, while appli- ances are the most important resources of the magnetic field. Besides, different types of structures have distinctions in shielding efficiency-the structures of reinforced concrete has superior shielding efficiency （19.5%-39. 1%） to general mud and brick structures（8.79 %-11.27 %）, and they both shield the electric field perfectly.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2008年第1期60-63,共4页
High Voltage Engineering
关键词
电磁环境
高压输电线
实地测量
工频电场
工频磁场
屏蔽效能
electromagnetic environment
high voltage transmission line
field test
power frequency electric field
power frequency magnetic field
shielding efficiency
