Computation Of Maximal Electric Field Value
Generated By A Power Substation
Author(s)
N. Kovač, D. Poljak, S. Kraljević & B. Jajac
Abstract
A procedure for a computation of the maximal value of extremely low frequency
(ELF) electric field from a power substation is proposed. The present technique
is based on a multiquadric approximation of the electric field. The approximation
is obtained using discrete field values calculated by the Source Element Method
(SEM) representing a variant of Indirect Boundary Element Method (IBEM).
The approximation sufficiently handles multidimensional multiextreme functions
by interpolating their discrete values accurately. Subsequently, the maximal
electric field value is evaluated by minimizing the negative multiquadric
approximation via the stochastic optimization method – differential evolution.
Therefore, the procedure provides the maximal field value assessment on the
basis of a limited number of computed discrete values, thus reducing the
computational effort.
1 Introduction
A computation of the maximal value of extremely low frequency (ELF) electric
field from a power substation has been of great interest in last decades. The
reason for this is the increasing public concern regarding the possible health risk
for human exposure to ELF electric field and magnetic flux density. It is to be
noticed that the present piece of work has been focused only toward the technical
aspects of electric field assessment. The ELF electric field from substations has
been determined via the computations or/and measurements in [1–6], presenting
a number of three-dimensional as well as contour plots. Nevertheless, they
provided a useful description of the field characteristics, no technique
incorporating certain optimization method for assessing the maximal electric
field value has been applied in these papers. The spatial electric field function
Keywords
Related Book
Other papers in this volume
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