接地装置冲击接地电阻的测量与特性研究

冲击接地电阻一般用来评估雷击短路情况下的接地装置的安全性,目前国内针对接地装置冲击特性的研究相对较少,尚无法准确了解其规律及特点。为准确掌握接地装置的冲击特性,从仿真计算和场地试验两方面入手,建立了合理的接地装置暂态模型,结合土壤放电特性、频变特性及材质规格等因素进行全面综合考量,深入分析了冲击接地特性与工频特性、环境条件及工程实际应用价值等方面的影响规律。

Research on Measurement and Characteristic of Grounding Device Impulse Grounding Resistance

The impulse grounding resistance is commonly used to evaluate the safety of grounding device in lightning short circuit con?ditions, the current domestic study of grounding device are relatively few, it is unable to accuartely understand the rules and character?istics. To accurately grasp the impact characteristics, from two aspects of the simulation calculation and field test, a reasonable grounding device transient model is established. Comprehensively considering the factors such as oil discharge characteristic, frequency characteristic and material specification, the impact characteristics, power frequency characteristics, environmental condi?tions and the value of engineering application are analyzed in detail.