Exposure Analysis of a Human Body due to Underground Power Cables and Magnetic Field Mitigation
K. ATES H. Feza Carlak Sukru Ozen
AbstractIn this paper, the magnetic field exposure analysis of a human body due to underground power cables is carried out as the simulation study. Simulations are implemented through a finite element method (FEM). Human body is modeled as a two layered cylinder. Upper layer of the cylinder is selected as an average skin tissue and the inner layer is formed as an average muscle tissue with realistic values at an extremely low frequency (ELF) region. Shielding is applied as the mitigation technique and aluminum (Al) is used as a shielding material. The thickness of 1, 2, 3 and 4 mm shielding materials are applied, respectively. Evaluations are implemented with respect to the magnetic flux density and the induced current density. 4 mm shielding which is the thickest material used simulations shows the best shielding results to mitigate the magnetic flux density and induced current density. The worst shielding is obtained for the 1 mm thickness of the material, as expectedly. Furthermore, as the distance of the source increases, both magnetic flux density and induced current density decrease. In other words, these parameters depend on the distance between a source and observation points. Different induced current density values of skin and muscle are observed due to the different electrical properties of tissue. Assessments have been done according to exposure limits published by the wellknown organizations.