SYJ型接地装置的开发与应用

Development and Application of SYJ Type Grounding Device

降低山区线路杆塔的接地电阻是一个难以解决的问题。根据大开挖式杆塔基础的特点,研发了一种利用杆塔基础降低杆塔接地电阻的SYJ型接地装置。运用电磁场理论推导出SYJ型接地装置的接地电阻,给出了工程设计方法。用模拟电荷法在Matlab中进行了仿真分析,并运用到实际工程中,模拟试验和工程应用结果验证了理论推导的正确性。该新型接地装置散流特性好,降阻效果优良,可以广泛应用于高土壤电阻率地区和占地面积较小的接地工程。

Decreasing the grounding resistance of transmission tower is a difficult problem in mountainous. According to the excavated tower foundation characteristics, a new SYJ type grounding device is developed to decrease the foundation grounding resistance. Using electromagnetic theory, the SYJ type grounding device grounding resistance is derived and engineering design method is given. Then, MATLAB is adopted for simulation analysis, which is applied in practical engineering. The applicable results prove validity of theory and formula. The presented grounding device is good in current diffusion and resistance reduction, so it can be widely applied to the grounding grid in high resistivity zones or the grounding grid with scanty area.