Computation Of Maximal Magnetic Field Value
Generated By A Power Substation
Author(s)
N. Kovač, D. Poljak, S. Kraljević, N. Božić & N. Grulović
Abstract
A procedure for the computation of the maximal value of extremely low
frequency (ELF) magnetic fields from a power substation is proposed. The
present technique is based on the multiquadric approximation of the magnetic
field. The approximation is obtained using discrete field values calculated by the
Biot-Savart law, where each energised substation conductor has been divided
into a corresponding number of straight segments. The approximation
sufficiently handles multidimensional multiextreme functions by interpolating
their discrete values accurately. Subsequently, the maximal magnetic field value
is evaluated by minimizing the negative multiquadric approximation via a
stochastic optimization method – differential evolution. Therefore, the procedure
provides the maximal field value assessment on the basis of the limited number
of computed discrete values, thus reducing the computational cost.
1 Introduction
An assessment of extremely low frequency (ELF) electromagnetic fields to
which human beings are exposed 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 a possibility of
electromagnetic interference (EMI) threat concerning possible malfunction of
sensitive electronic equipment. Namely, malfunction of some medical devices
could seriously affect human health. Consequently, an assessment of the
maximal ELF field quantities for comparison purposes with the (inter)national
guidelines should be considered as a rather important task. Therefore, a
particular attention should be focused to significant ELF field sources such as
power substations.
Keywords
Related Book
Other papers in this volume
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