蒙西地区典型季节变化对接地网接地阻抗影响研究

Study on Effect of Typical Seasonal Variation on Grounding Impedance of Ground Network in Mengxi Region

季节变化改变土壤电阻率值,土壤电阻率的改变对接地装置阻抗值造成影响。在某场区土壤电阻率监测的基础上,研究该场区埋设的不同类型接地装置阻抗变化情况。结果表明:经相关性分析,该地区全年土壤电阻率与气温变化呈强负相关,表现出明显的季节变化特性;在设计受季节变化影响较大的区域接地网时,可以通过增大接地网面积、接地网埋深,以及采用磁导率小、柔韧性好的石墨接地装置,来减小季节变化对接地阻抗值的影响,为受季节变化影响较大地区接地网设计提供参考。

The seasonal change will change the soil resistivity value,and the change of soil resistivity will have an impact on the impedance value of the grounding device.On the basis of soil resistivity monitoring of a certain region,the impedance changes of different types of grounding earthing devices buried in this field area are studied.The results show that the correlation analysis,throughout the year soil resistivity and temperature changes in the region are strongly negatively correlated,showing obvious seasonal changes in characteristics.When designing regional grounding network greatly affected by seasonal change,the methods can be used increasing the area of the ground network,ground network depth and the use of small permeability,good flexibility of the graphite grounding device to reduce the seasonal changes in the value of the impact of the grounding impedance,to provide reference for the design of grounding grids in areas greatly affected by seasonal changes.