垂直接地极对输电线路杆塔接地电阻的影响效果

本文利用相关规程规定的接地电阻计算方法,研究了垂直接地体的不同间隔距离、长度和等效直径对杆塔接地电阻的影响效果。通过计算发现,随着垂直接地极间隔距离的减小、长度和等效直径的增加,杆塔接地装置的整体接地电阻不断降低,但降低的幅度不断下降,整体接地电阻最后趋于饱和。最后本文提出了典型设计参数下,垂直接地极间隔距离、单根长度和等效直径对整体接地电阻的影响范围。通过设置不同的垂直接地极参数,可以取得不同的降阻效果,为杆塔接地装置的设计及改造提供参考。

Effect of Vertical Grounding Pole on Grounding Resistance of Transmission Line Tower

This paper studies the effect of different spacing distances,lengths and equivalent diameters of vertical grounding bodies on the grounding resistance of the tower by using the grounding resistance calculation method specified by the relevant regulations.The calculation results show that the overall grounding resistance of the tower grounding device decreases continuously as the distance between the vertical grounding poles decreases and the length and the equivalent diameter increase,but the decreasing amplitude decreases continuously and finally the overall grounding resistance becomes saturated.At last,the paper proposes the influence of vertical grounding distance,single length and equivalent diameter on the overall grounding resistance under typical design parameters.By setting different vertical grounding parameters,different resistance reduction effects can be obtained,which provides reference for the design and modification of the tower grounding device.