Author(s)

M. Suojanen, C. Lederle, R. Heim, T. Keikko, S. Kuusiluoma, L Korpinen

Abstract

The effect of trees on calculation of electric fields near 400 kV transmission lines M. Suojanen, C. Lederle, R. Heim, T. Keikko, S. Kuusiluoma, L. Korpinen Department of Electrical Engineering, Tampere University of Technology, Finland Abstract In a previous study on electric fields near 400 kV transmission lines it was noticed that the differences in calculations and measurements were caused by trees dampening the electric field. This caused the need for further investigation and dampening measurements. The aim of this study is to model single trees and forest, in the calculation of electric fields using the Finite Element Method (FEM). International Commission on Non-Ionizing Radiation Protection (ICNIRP) has published guidelines for public and occupational exposure to 50 Hz electric fields caused by power transmission lines. They are 5 kV/m and 10 kV/m, respectively. There are some spans, where guideline for public exposure may be exceeded. Thus it is importan

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