输电杆塔伸长接地体冲击接地电阻的计算

Calculation of impulse earthing resistance of extension grounding rod for transmission poles

主要讨论了输电杆塔伸长接地体在雷电流作用下冲击接地电阻的计算．在考虑火花放电对接地体半径影响的基础上，提出了一种非均匀分布参数的链形回路的数学模型，对计算结果进行分析，并与以前实验及计算结果进行了比较，得出了一些结论．

The calculation of impulse earthing resistance of extension grounding rod for transmission poles under action of lightning,is discussed mainly.On the basis of considering the effect of spark discharge on the radius of grounding rod,a mathematical model of chain circuit with non uniform distribution parameters,is proposed.The calculated results are also analyzed and compared with the experimental results.Thus,some conclusions are obtained.