Accurate magnetic field evaluation due to underground power cables

Exposure to low frequency magnetic fields has been a matter of health concern and controversy over the past years. These aspects motivated the development of methods and algorithms for the magnetic field evaluation due to power transmission lines and cables. In this paper special attention is given to buried power transmission cables. Results for different values of frequency and different values for the magnetic permeability of the soil are obtained, presented and compared with a standard approximation. Results confirm the importance of the method developed in this paper, not only as a reference method but also as a mandatory method for higher values of the soil magnetic permeability and higher values of the frequency. Copyright © 2008 John Wiley & Sons, Ltd.