柔性石墨复合接地材料在山区配网中的应用

Application of Flexible Graphite Composite Grounding Material in Distribution Network of Mountain Area

电网线路雷击跳闸占整个电网的跳闸总数的70%~80%以上。减少雷击跳闸事故一方面需要安装相应的防雷保护装置,另一方面要降低接地电阻。传统的镀锌角钢接地网具有易腐蚀、施工工程量大、占地多、易产生施工纠纷、易受客观因素影响,寿命不满足要求等缺点。柔性石墨复合接地材料具有导电性好、无毒、无污染,抗酸碱、抗腐蚀性能强,性能稳定,使用寿命长等特点。在信宜供电局配网的接地系统中使用表明,新型的接地材料能适应各种极端地质条件,并能够满足实际工程应用需求,值得推广应用。

Lightning trip of the power line accounts for 70% - 80% of the total trips of the entire power grid. To reduce the risk of lightning strikes, on the one hand, it is necessary to install corresponding lightning protection devices, and on the other hand, ground resistance must be reduced. The traditional galvanized angle steel grounding grid has the defects of easy corrosion, large amount of construction work, large area occupation, easy to produce construction disputes, easy to be affected by objective factors, and unsatisfactory life expectancy. Flexible graphite composite grounding material has good electrical conductivity, non-toxic, non-polluting, anti-acid and alkali, strong corrosion resistance, stable performance, and long service life. The application of the new grounding material in the grounding system of Xinyi Power Supply Bureau shows that the new type of grounding material can adapt to various extreme geological conditions and can meet the needs of practical engineering application and should be popularized and applied.