国内外水电站接地设计标准对比及应用

结合国内外主要水电站接地设计规范、导则等,介绍了国内外水电站接地设计的主要思路,列举了水电站接地网设计中土壤模型及土壤电阻率、接地电阻、接触电势和跨步电势的允许值及其计算值等方面不同的计算方法;同时,对计算方法之间的差异进行了研究分析。在此基础上,以海外实际工程为例,采用了国内外设计规范理论公式计算与接地计算软件CDEGS仿真相结合的方式,对数据进行了对比分析,根据分析结果,对各类计算方法的结论差异进行了总结,从而得出了不同计算方法之间的区别与联系。研究成果可为海外工程接地设计提供参考。

Comparison and application of grounding design standard for hydropower station at home and abroad

This paper introduces the main ideas of grounding design for hydropower projects at home and abroad according to the main design specifications and guidelines, and lists the different calculation methods of soil model and soil resistivity, grounding resistance, permissible value and calculated value of contact potential and step potential in the design of grounding grid of hydropower station. The difference of calculation methods is briefly analyzed. With the example of an overseas project, the grounding data analysis is carried out with the combination of these theoretical calculation formulas and the simulation software CDEGS. The differences of the conclusions were compared, thus the difference and connection between different calculation methods are obtained, and the reference for the grounding of overseas projects is provided. According to the result, the differences and relations between different calculation methods are obtained, which can provide reference for the grounding design of overseas projects.