杆塔接地网降阻剂降阻效率及影响因素研究

Study on the Efficiency and Influence Factors of Resistance Reducing Agent in Tower Grounding Grid

现行输电线路防雷工程采用降阻剂进行降阻时往往面临盲目施工、降阻效率低,降阻长效性差等技术瓶颈.采用CDEGS仿真计算软件建立"一"字型与方框射线型接地网模型,分别针对降阻剂的使用量、材料参数、敷设位置等因素对其降阻效率的影响规律进行计算.通过仿真计算说明不同接地网面积与土壤条件对降阻剂降阻效率的影响,根据仿真计算结果对实际输电线路杆塔接地网采用降阻剂降阻提出相应的施工建议.

With the using of resistance reducing agent,the hodiernal transmission line lightning protection engineering is often faced with blind construction,poor long effectiveness and other technical bottlenecks.The simulation software CDEGS is adopted to establish the“Yi”type and square frame with ray type grounding grid models.The influence of the factors such as the usage amount,material parameters,laying position of reducing agent are calculated.The influence of different grounding grid area and soil conditions on the efficiency of reducing agent was calculated by simulation,the proposed construction suggestions are proposed for the actual transmission line grounding grid resistance reducing with the resistance reducing agent.The research contents can provide a theoretical reference for the transmission line lightning protection and power system grounding field.