青藏线冻土地区接地问题探讨

【摘要】 在冻土地区,由于土壤电阻率的增大,电力设备的安全接地变得困难起来。介绍了在低温条件下对几种典型土壤以及各类降阻剂的电阻率特性进行实验研究的结果。给出了土壤电阻率随温度变化的规律。讨论了低温条件下降阻剂的使用方法和降阻效果。总结了国内外冻土地区接地设计的实验。对改善冻土地区接地安全性的方法提出了建议。更多还原

【Abstract】 Due to the high soil resisivity in permafrost,the safe grounding of electrical equipment becomes very difficult.The paper introduces the characteristics of resistivity of several typical soils and grounding resistance reducing agents at low temperature based on laboratory tests.The regularty of variation of soil resistivity versus temperature is given.The usage and effect of grounding resistance reducing agent at low temperature is discussed.The experiences of grounding design in permafrost at home and abroad are summed.Based on these works the measures to improve the safety of grounding in permafrost are suggested.更多还原