石墨/玻璃纤维复合接地材料在东北冻土层的应用

Application of Graphite/Glass Fiber Composite Grounding Material in Northeast Frozen Soil Layer

基于辽宁省特有的冻土条件,从冻土应力值变化对接地材料的性能影响、冻土层土壤电阻率变化对接地电阻的影响、冻土季节交变对接地材料的影响等方面进行了分析。研究结果表明:石墨/玻璃纤维复合接地材料在冻土层中应用时电气及力学性能较为稳定,冻土层产生的应力对石墨/玻璃纤维复合接地材料的力学性能及电气性能影响较小,能很好地解决因冻土的流变性对接地材料造成损坏、冻土不稳定性影响接地电阻以及传统金属接地材料在使用时数量多、施工难度大等问题,具有很好的经济效益和环境效益,保障了输电线路的安全运行。因此,在东北特殊的冻土层地质条件下,石墨/玻璃纤维复合接地材料应优先被采用。

Based on the unique permafrost conditions in Liaoning Province, the effects of soil resistivity changes on grounding resistance and seasonal interlocking ground changes in permafrost were analyzed.The results show that the electrical and mechanical properties of graphite/glass fiber composite grounding materials are relatively stable when applied in frozen soil layer, and the stress generated by frozen soil layer has little effect on the mechanical properties and electrical properties of graphite/glass fiber composite grounding materials. It can well solve the problems of damage caused by the rheological docking ground of frozen soil, the instability of frozen soil affecting the grounding resistance, the number of traditional metal grounding bodies in use, and the difficulty of construction. It has good economic and environmental benefits. It guarantees the safe operation of the transmission lines. Therefore, the graphite/glass fiber composite grounding material should be adopted first under the geological conditions of the special permafrost in northeast China.