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Soil discharge occurs when it is subjected to high impulse current, and it is closely associated with the impulse performance of grounding systems. In this paper, a new method is put forward to visualize the inner impulse discharge region of simulate soil (fine sand) directly, using X-ray imaging technology. According to the three views of the discharge region, the boundary surface of the discharge...
The aim of this paper is to calculate the response of grounding system under high-magnitude fault current accurately. In this work, A FEM model is presented to solve the problem in frequency domain. The ionized phenomenon in the soil around the grounding electrode is taken into account by setting the resistivity of every soil element varying with the electric field intensity. Open boundaries of earth...
A simulation model based on finite-element method is presented to analyze the soil ionization phenomenon around the grounding system under the impulse current. In this method, The non-linear characteristic of soil under an accidental short circuit or a stroke of lightning is taken into account by setting the resistivity of soil element varying with the electric field intensity of every element; open...
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