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This paper presents a comprehensive evaluation of the effect of frequency-dependent soil parameters on lightning-induced voltages by means of Visacro-Alipio formulae implemented in the Hybrid Electromagnetic Model (HEM). The results indicated this effect differently affects induced voltages along the overhead line. For high resistivity soils, at line center, the frequency dependence effect of soil...
The impact of the frequency dependence of soil resistivity and permittivity on lightning overvoltages induced on overhead lines over lossy ground is investigated. The Visacro–Alipio expressions were implemented on the hybrid electromagnetic model to take this effect into account. Systematic simulations were performed considering representative current waveforms of first and subsequent strokes and...
A preliminary investigation on lightning-induced voltages over lossy ground including the effect of the frequency dependence of soil parameters by means of systematic simulations using the HEM model is presented, considering realistic representations of lightning currents of first and subsequent strokes. The results show that this effect promotes the decrease of lightning-induced voltage amplitudes,...
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