The Influence of the Soil Parameters Dependence with Frequency on Impulse Grounding Behavior
نویسندگان
چکیده
This paper investigates the influence of the soil electrical conductivity and permittivity dependence with frequency in grounding response to lightning currents. Simulated results for soil with frequency variation of its parameters show: i) a significant reduction of the amplitude values of the transient voltages and impulse impedance; ii) an increase of the expected effective length of electrode; iii) a significant reduction of the impulse coefficient with values, in some cases, below unity. These effects are more relevant for high-resistivity soils and are due to the pronounced capacitive effect observed when the soil parameters dependence with frequency is included in simulations.
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