柔性石墨接地极在桂林地区10kV线路杆塔接地改造中的应用

Application of Flexible Graphite Grounding Electrode for Grounding Transformation of 10 kV Line Tower in Guilin Area

桂林地区配电网设备接地因岩石地质原因,难以施打接地桩及敷设接地网,造成电阻超标的问题日益突出。柔性石墨接地极相较传统镀锌钢接地材料具有更加稳定、耐腐蚀等接地特性,因此开展线路杆塔接地改造关键技术的研究。对桂林地区进行土壤结构和杆塔接地电阻进行勘察,将柔性石墨接地极应用于10 kV线路杆塔接地改造,并评估接地电阻、接触电压、跨步电压等安全标准。

In view of the rock geology of distribution network equipment grounding in Guilin area,it is difficult to construct the grounding pile,and the grounding resistance of the grounding grid exceeds the standard.Compared with the traditional galvanized steel grounding material,the flexible graphite grounding electrode has more stable and corrosion-resistant grounding characteristics.Therefore,the key technology research of grounding transformation of line tower was carried out.The soil structure and tower grounding resistance were investigated in Guilin area,and the flexible graphite grounding electrode was applied to the transformation of 10 kV transmission tower grounding.The safety standards such as grounding resistance,contact voltage and step voltage were evaluated.