The Research on the Impulse Characteristics of the Extended Grounding Electrode in the Layered Soil

摘要: The composition of the tower's grounding system is always with several layers, for single-layer structure tower in high soil resistivity area, it use partial replacement to reduce resistance, also analysis object equivalent hierarchical model, Therefore, study layered impulse characteristics more representative. To impact properties grounding, In this paper, through establishment a double-layer model structure, electrode studied simulation, resulting quantitative relationship between soils partially replacing low area size and resistance elongation grounding. results show that decreases as increases converges certain value, which indicates extended expand upper level zone approaching single layer soil. have reference value local method areas determination plan.