A Simplified Method For The Assessment Of ELF
Magnetic Fields From Three-phase Power Lines
Author(s)
S. Kraljevic, D. Poljak & V. Doric
Abstract
A simplified analytical method for calculation of magnetic flux density near the
three-wire, three-phase power line is proposed. Analytical results are compared
against numerical results computed by using the FDIES (Frequency Domain
Integral Equation Solver) research code developed at the University of Split and
good agreement was found. The results obtained by both methods have been
further compared with experimental measurements and satisfactory agreement
among all the results has been found. The obtained analytical and numerical
solutions have also been checked against the international safety guidelines and
standards.
Keywords: Human exposure, ELF magnetic fields, analytical solution, numerical
solution, safety guidelines.
1 Introduction
The electromagnetic fields generated by extremely low frequency (ELF) sources
are ever present in daily life. The increasing number of power systems makes the
question whether there are possible adverse effects to human health due to the
exposure to these fields more important. To determine the coupling mechanisms
between electromagnetic fields and the body one should first determine
directions and magnitudes of the electric and magnetic fields at different
distances from the electromagnetic field source. At low frequency (when the
displacement current can be neglected) the analysis of magnetic field H and the
electric field E can be decoupled. Electric field is easily shielded, e.g. using a
thin, grounded metal foil and its magnitude is reduced in the surrounding
environment by the presence of trees, houses etc. Its effect on the conductive
Keywords
Human exposure, ELF magnetic fields, analytical solution, numerical
solution, safety guidelines
Related Book
Other papers in this volume
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