植物对110kV架空输电线工频电场和磁场分布影响的测量分析

Measurement and Analysis of Plants Impact on 50 Hz EMFs of 110 kV Overhead Power Transmission Lines

目的探究植物对110 k V工频电场和磁场分布的影响。方法首先阐述工频电场、磁场的健康危害,110 k V工频电场和磁场分布影响研究现状,然后采用电磁辐射测量系统PMM8053A,按照《交流输变电工程电磁环境监测方法（试行）》（HJ 681-2013）监测标准,对城市典型110 k V架空输电线路相同工况下无植被区域、草坪、灌木、高大树木等四个区域的工频电场和磁场进行监测和分析。结果植物对工频电场的削弱率为6.1%～99.9%,其中,草坪、灌木、高大树木削弱率分别为6.0%～13.6%、32.4%～37.1%、98.3%～99.9%;植物对工频磁场的影响作用不明显,削减率为6.0%～10.6%。结论植物对工频电场和磁场的影响不一致,其中对工频电场的影响明显,特别是高大树木对工频电场削弱率达90%以上,高大树木对工频电场的削减效果大于灌木,灌木大于草本植物;1.5 m高度树木密度越大,削减效果越好。

Objective To explore the effect of plant impact on electric and magnetic field distribution of 110 kv overhead power transmission lines. Methods The health hazards of 50Hz EMFs, research Status of 50Hz EMFs distribution of 110kV are elaborated, and 50Hz EMFs of 110 kV Overhead Power Transmission Lines in no vegetation area , lawn, shrubs, tall trees area were measured and analysized PMM8053A. Results Plants can weaken the 50Hz electric fields obviously,but do the little work on the 50 Hz magnetic fields. The regression rate of electric fields is from 6.1% -99.9%. Furthermore ,the regression rates of electric fields in lawn, shrubs, tall trees area were 6.0% - 13.6% ,32.4% -37.1% ,98.3% -99.9%. At the same time, the regression rates of magnetic fields were 6.0% - 10.6%. Conclusion Plants Impact on 50 Hz electric fields and 50 Hz magnetic fields was different. Significant on the 50 Hz electric field. The regression rate of electric fields in tall trees area was over 90%.