考虑电感效应的大尺寸接地体冲击散流过程建模分析OA

The impulse dispersion process is a key link that affects the performance of the tower grounding grid,and it requires accu-rate modeling.It is based on Maxwell's electromagnetic field theory to establish a coupled model that takes into account the inductive effect of the grounding body and the soil ionization process,accurately simulating the impulse dispersion process.Based on this mod-el,it expounds the influence of the inductive effect of the grounding body and the soil ionization process on the impulse grounding re-sistance.It analyzes the influence of wave head time on impulse grounding resistance.This model can simulate the impulse dissipation process in the ground quite well,and the calculation results are relatively accurate.The error of the impulse grounding resistance is less than 10 Ω.The inductance effect of the grounding body leads to the earlier peak moment of the transient GPR(ground potential rise),causes overshoot in the GPR waveform,and increases the impulse grounding impedance.The soil ionization process has a rel-atively small impact on the GPR waveform,but it will reduce the impulse grounding impedance.As the wave head time shortens,the impulse grounding resistance increases accordingly and shows a saturation trend.