基于有限元方法的山地输电杆塔接地特性分析OA

In order to conduct in-depth research on the grounding characteristics of transmission line towers in mountainous regions,finite element method(FEM)is used to model the tower foundation,grounding system,and soil medium in detail.The grounding characteristics under different grounding models and operating conditions are analyzed.The results show that,the soil resistivity and the length of the grounding conductor have a significant impact on the grounding resistance;the soil environment where the grounding conductor is located has a certain impact on the grounding resistance,and it can be considered to implement resistance reduction measures around the grounding conductor;under high-frequency conditions,as the impedance of the conductor increases,the difficulty of high-frequency current propagation along the conductor increases,making it easier for the current to dissipate near the current injection point.In engineering,resistance reduction measures can be considered near the current injection point.This study can provide reference for the calculation of surface potential and the design of lightning protection and resistance reduction in practical engineering.