Magnetic Field Mitigation Shielding of Underground Power Cables

This paper is a contribution to the analysis of magnetic field mitigation shielding of underground power cables. A hybrid finite-element method (FEM)/semi-analytical expansion is adopted for the numerical treatment of the open boundary magnetic field problem. Different constitutive materials for the magnetic shielding are studied, and comparison is established between conductive (aluminum) and ferromagnetic (steel) cases. A horizontal flat configuration for the underground cable is considered. It is concluded that the aluminum shielding is more efficient as far as magnetic field mitigation is concerned.