探讨了在多年冻土地区影响土壤电阻率的因素和使用低电阻接地模块降低接地电阻的工程方法。
The factors affecting the resistivity of frozen soils were discussed, and some solutions to grounding for lightning using grounding modules were introduced.
基于等值土壤电阻率的概念，导出了三层土壤中垂直棒接地电阻解析计算公式。
The analytic computational formula for grounding resistance of grounding rods in three-layer soil is derived based on the concept of equivalent soil resistivity.
介绍接地电阻测试的基本原理，设计了符合IEC61010标准的由工业PC控制的接地电阻测试系统。
The paper introduces the principle of grounding resistor test, and designs an IPC-based grounding resistor testing system corresponding to the standard of IEC61010.
从接地电阻的测量原理出发，讨论了采用短电流极引线测量地网接地电阻的可行性。
With the principle of measuring resistance, the paper carries through the theory analysis about possibility of measurement method with short electrode wire.
并且根据接地电阻的大小选择不同的暂态能量算式，故可判断金属性接地故障和高接地电阻接地故障。
Zero-sequence transient energy is calculated for low earthing resistance and single-phase transient energy for high earthing resistance.
介绍了变频法测量接地电阻的原理、接地电阻变频测量仪的结构、数据处理方法和实测结果。
This paper introduces the principle of frequency changing method of grounding resistance measurement, the structure of frequency conversion measurement apparatus and data process method.
重点提出了如何在多石土壤、砂砾、岩石等高电阻率的场所实现低接地电阻的设计要求。
The realization of low earthing resistance design in high resistance rate places is emphasized, such as stony soil, gravel, rock and so on.
在第二章，文章详细分析了测量接地电阻的基本原理，并对国内外现有典型接地电阻测量方法进行了分类介绍。
In chapter 2, the fundamental principium of measuring grounding resistance is analyzed detailedly, further introduces typical measurement methods in the world.
实验测量了两层水平分层土壤结构下的接地电阻和土壤电阻率，证实了土壤分层模型的有效性和可靠性。
Finally grounding resistance and soil resistivity are measured under the condition of two-layer horizontal soil, and the model is proved to be reasonable.
该文从地网接地电阻的物理本质出发，考虑不均匀土壤情况，对地网接地电阻降低措施及效果进行了分析和讨论。
From the basic concept of grounding grid resistance, a full analysis of the measures and effect of decreasing the grounding grid resistance is performed in non uniform soils condition.
利用该统一模型，分析了外加直流电压法、外加交流电压法、乒乓切换法中电刷接触电阻对励磁绕组接地电阻测量值的影响和危害。
By using power of DC superimposed AC, oxidation rate rose with increase of voltage but had nothing to do with frequencies in this experiment.
利用该统一模型，分析了外加直流电压法、外加交流电压法、乒乓切换法中电刷接触电阻对励磁绕组接地电阻测量值的影响和危害。
By using power of DC superimposed AC, oxidation rate rose with increase of voltage but had nothing to do with frequencies in this experiment.
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