10kV配电线路钢筋混凝土电杆接地特性试验研究

Experimental Study on Grounding Characteristics of Reinforced Concrete Poles for10kV Distribution Lines

钢筋混凝土电杆的接地电阻是配电线路防雷接地和保护接地设计的一个基础参数,在我国一直缺乏深入研究。使用移动式冲击大电流发生装置,结合运行工程实际情况,首次对电杆接地特性进行了大电流真型试验研究,得到多种电杆接地设置形式下的工频接地电阻值、考虑火花放电效应和电感效应的冲击接地电阻值,并分析实测结果提出了电杆接地设置建设。研究结果可用于指导配电线路工程接地设计,也为建模仿真提供检验依据。

The grounding resistance of reinforced concrete pole is a basic parameter of the design of lightning grounding and protective grounding for distribution lines,however the in-depth study on this topic has been not carried out in China.Using movable type of impulse high-current generator and combining with actual operation of distribution li0nes,for the first time the high-current true type tests of grounding characteristics of reinforced concrete pole are carried out.The values of power frequency grounding resistances under various pole grounding modes and the values of impulse grounding resistances considering the effects of spark discharge effect and inductance are attained,and based on the analysis on measured data the proposals on pole grounding are put forward.Results of this research are available for reference to the design of transmission line grounding and offer the foundation for the verification of modeling and simulation.