| Title |
Profiles of Electric and Magnetic Fields around 22.9 [ kV ] Distribution Lines |
| Abstract |
In recent years, the electromagnetic environments are varied with the increase of power consumption and the spread of household electric appliances. Most of the interests to date have concentrated in the area of human health effects associated with exposure to power frequency electric and magnetic fields, and thus the precise measurement and analysis are required. In this paper, the measurements and analysis of the extremely low frequency(ELF) electric and magnetic fields induced by actual 22.9[kV] distribution lines were performed. The experiments have bean carried out by lateral profile, and the theoretical analyses were made by use of FIELDS program for the sake of comparison with the experimental data. Electric and magnetic field intensity were strong under power distribution lines, and were inversely proportional to lateral distance, The profiles of electric and magnetic fields were M and ∩ shapes, respectively, and the measured data were good in agreement with the theoretical results. Both the electric and magnetic field intensity were increased with increasing the measurement height. The electric field profiles were influenced by arranging three phase conductors, and the maximum value of the magnetic field profiles was shifted from a center point by the effect of unbalance in phase current amplitudes. |