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Scientific project: Modeling and Environmental Aspects of ELF Electromagnetic Fields

Project code  023-0231582-2294

Project name Modeling and Environmental Aspects of ELF Electromagnetic Fields

Senior researcher Nikša Kovač

Institution of employment University of Split, Faculty of Electrical Engineering, Mechanical Engineering a...

Program name Environmental EMC and Impact of Radiation on Human Health

Scientific area technical science

Peer review group Computer Science

Summary An assessment of extremely low frequency (ELF) electric fields and magnetic flux densities to which human beings are exposed, as well as the induced current densities in the human body, has been of great interest for many years. Reason for this is the public concern regarding the possible health risk due to human exposure to such field sources. Moreover, there is an interference of ELF electromagnetic (EM) fields with sensitive electronic equipment located in the field source environment, e.g. malfunction of some medical devices could seriously affect the human health. Research aim of the project is related to an accurate assessment of the maximal ELF field quantities and subsequent calculation of resulting induced body currents. The project will deal with EM fields present in industrial, office and domestic environments. A particular attention will be focused to an efficient modeling of significant ELF field sources, such as power substations, transmission/distribution lines and power plants. Once, the field levels surrounding the sources are determined the induced current density in human body will be calculated. Assessment procedure will be based on the following assumptions: (1) Field quantities could be computed using the finite element and the boundary element method, respectively, since the proposed numerical methods generally provide more accurate modeling of the problem then the analytic ones. Hence, it is assumed that currents flowing through the feeder neutrals, grounding conductors, ground grids, casings and other metallic structures may be taken into account by the detailed modeling using the numerical approach. (2) Spatial functions related to electromagnetic quantities may have a number of local maximums arising from the complex source concentration prevailing in power substations and power plants. Hence, an application of a modern stochastic optimization method (evolution strategy, genetic algorithm) seeking for the global maximum could be useful tool. Computational results will be compared to the experimental ones. The research importance is related to an accurate treatment of both the maximal ELF field values and induced current densities in human body for comparison purposes with the reference levels and basic restrictions proposed by (inter)national guidelines. Consequently, the protective measures regarding the possible adverse health effects due to exposure to EM fields are expected to be improved.

Key words |ELF electromagnetic fields|human exposure,health protection,electric field assessment,magnetic flux density assessment

Contract from 2.1.2007

Croatian scientific bibliography http://bib.irb.hr/lista-radova?sif_proj=023-0231582-2294&print=true&lang=EN

Address for communication
 Name and surname Nikša Kovač
 Street and no. FESB, Ruđera boškovića bb, 21000, Split
   
   
 E-mail nkovac@fesb.hr
 Web address  
Project assistants 
  Name and Surname  Status
Mario Cvetković Researcher
Tonko Garma Scientific novice
Nedjeljka Grulović-Plavljanić Researcher
Tomislav Kilić Researcher
Nikša Kovač Project leader
Dragan Poljak Researcher
Jurica Smajo Scientific novice
Silvestar Šesnić Scientific novice