Lightning current distributions in a vertical earthing electrode

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Abstract

This paper presents a model for calculating current distribution in a vertical electrode and to the surrounding ground resulted by lightning. The model is based on electromagnetic field theory for calculating the response of the step wave-pair model. The physical parameters of the electrode such as the radius and length of the electrode is considered. Furthermore, characteristics of the ground such as the conductivity, permittivity and the propagation velocity of the currents in the ground are also being considered. The model is based on dividing the electrode into finite sections. Then, the "Compensating Currents", ground leakage currents and the electrode's currents are calculated for each section at all times. The model is applied by a MATLAB code for the calculation of the above-mentioned currents' distributions. The results show that for soils of high conductivities shorter electrodes are needed for dissipating lightning currents. Furthermore, the soil conductivity parameter is the more sensitive parameter in comparison to the other parameters.

Original language English IET Conference Publications Institution of Engineering and Technology CP711 9781785611384, 9781785611889, 9781785612022, 9781785612268, 9781785612275, 9781785612381, 9781785612688, 9781785612862, 9781785612923, 9781785612947, 9781785612992, 9781785613005, 9781785613074, 9781785613449, 9781785613616, 9781785613685, 9781785613937, 9781785614064, 9781785614064, 9781785614170, 9781785618260 9781785614064 https://doi.org/10.1049/cp.2016.1026 Published - 2016 Mediterranean Conference on Power Generation, Transmission, Distribution and Energy Conversion, MedPower 2016 - Belgrade, SerbiaDuration: 6 Nov 2016 → 9 Nov 2016

Publication series

Name IET Conference Publications CP711 2016

Conference

Conference Mediterranean Conference on Power Generation, Transmission, Distribution and Energy Conversion, MedPower 2016 Serbia Belgrade 6/11/16 → 9/11/16

Keywords

• Electromagnetic analysis
• Electromagnetic fields
• Grounding electrodes
• Lightning
• Transient response

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