HM-JD-L28型新型石墨复合接地体与常规降阻方式降阻效果的对比分析

Comparative Analysis of HM-JD-L28 Composited Grounding Conductor and Routine Grounding Resistance Reducing Measure

输电线路杆塔接地对电力系统的安全稳定运行至关重要,降低杆塔接地电阻是提高线路耐雷水平,减少线路雷击跳闸率的主要措施。介绍了HM-JD-L28型新型石墨复合接地体的性能特点并将其与常规降阻方式如:接地模块、降阻剂、增加射线长度等在不同情况下的降阻效果进行了分析对比,对如何使用接地模块、降阻剂提出了意见:不推荐在土壤电阻率低于500Ωm的地区使用接地模块及降阻剂,降阻效果不明显。

The grounding system of transmission lines tower play an important role for the stability of the power grid, the main measure to improve lightning withstand level and reduce lightning trip-out rate is reducing grounding resistance. The characteristic of HM-JD-L28 composited grounding conductor is introduced, and several common grounding grounding module, resistance reducing agent and resistance reducing measures such as： increasing the length of grounding conductor are analyzed and compared, suggestions about the usage and effect of grounding module and resistance reducing agent are proposed： using grounding module and resistance reducing agent in the soil where resistivity is lower than 500 Ωm is not recommended, because the resistance reducing effect is not obvious.