深层垂直接地法在输电线路杆塔中的应用

根据城区线路接地敷设中施工场地受到限制的特点，提出了在运行线路上使用深层垂直接地法来提高输电线路耐雷水平的新思路。它是利用深层潮湿土壤的土壤电阻率较低并具有不易受外力破坏、不易氧化锈蚀、钢材消耗量小等优点改善接地网络的。110kV槊窑钢线部分杆塔采用了深层垂直接地法，施工前后测量和运行状况表明，深层垂直接地法能有效降低杆塔工频、冲击接地电阻值和线路雷击跳闸率，同时能大量减少运行维护费用，是一种值得推广的方法。

Decreasing the Tower's Grounding Resistance Using Deep-Seated and Vertical Grounding

In this paper, a new method for decreasing the rower's grounding resistance is proposed. The experimental results show that the deep-seated and vertical grounding can effectively reduce the tower's grounding resistance by deep humid soil with lower resistivity. In addition, the method is steel saving, and effective in preventing both oxygenation and damage by outside force.