接地模块冲击特性的试验研究

介绍了非金属接地模块的组成及降阻原理,通过冲击电流试验平台,在不同土壤电阻率下分别对不同大小、不同形状、不同材料的接地体进行冲击电流试验。分析试验数据结果表明,施加不同冲击电流时,相同散流面积下圆柱形接地模块的散流效果比长方体形的散流效果好,冲击电流越大效果越明显;随着接地模块体积和散流面积的增加,降阻效果的增加呈饱和趋势;接地模块的降阻率不随土壤电阻率的改变而改变,土壤电阻率越高,接地模块的降阻效果越好;石墨型接地模块的降阻效果堪比传统金属接地体,石墨部分降阻效果非常明显,为工程应用提供参考。

Experimental Study on Impact Characteristics of Grounding Module

The components of non-metallic grounding module and mechanism of resistance reduction was described.Through impulse current test platform,impulse current test had been done on grounding modules of different size,different shape and different material under different earth resistivity.The test data showed that when they had same current scattering area the current scattering effect of cylindrical grounding module was better than rectangular grounding module under different impulse current,the greater impulse current with the more obvious of the current scattering effect;The increase of grounding module size or current scattering area would increase its resistance reduction effect,but this effect was saturated trend;The resistance reduction rate of grounding module had nothing to do with the soil resistivity,the greater of the soil resistivity,the more obvious of the resistance reduction effect;The resistance reduction effect of graphite type grounding module could be compared to traditional metal grounding body and the resistance reduction effect of graphite was very obvious,its would provide the reference for the engineering application.