某新建线路大量接地电阻超标原因分析及对策

Analysis of a Large Number of Grounding Resistances Exceeded of a New Line and Countermeasure

对福建省某新建220 kV同塔双回线路杆塔接地电阻大量超标的现象进行了分析,得出造成该线路接地电阻大量超标的主要原因是设计不合理,设计人员没有充分考虑各基杆塔的具体情况,仅给出单一的接地形式。在对接地电阻大量超标原因分析的基础上,笔者以某一基杆塔为例,探讨了该杆塔的改造方案,分析表明:该改造方案可起到较好的降阻效果。

The phenomenon that a large number of grounding resistance exceeded was analyzed, and it was concluded that the main reason result in a lot of grounding resistance exceeded was improper design, designers did not fully take into account the specific circumstances of each tower and gave only a single grounding type. Based on the analysis of the reason that a lot of grounding resistance exceeded, this paper used a tower as an example to investigate the transform program of the tower, the analysis showed that it can play a good reduction in resistance.