电极位置对垂直三层土壤结构中接地系统接地电阻测量结果的影响

如何简便、准确地测量发、变电站接地系统的真实接地电阻是保证电力系统安全、可靠运行的一项重要措施。论文采用数值计算方法分析了垂直三层土壤结构中的接地系统接地电阻测量时测量电极的布置规律 ,分析了不同接地系统位置情况下 ,不同方向布置测量线路所要求的电压极的正确位置 ,也讨论了不同测量路线时采用 0 .6 18法进行接地电阻测量时的误差。分析表明 ,科学合理的接地电阻测量方法应当基于了解接地系统所处位置的土壤地质分层结构和选择合理的电流极引线方向及电压极的布置位置 ,确保比较准确地测量接地电阻 ,并且能够分析所采用测量方法的测量结果与真实值之间的误差 ,进行合理修正。分析结果可为电力运行部门提供参考

Effects of electrode placement on grounding resistance of grounding system measured in vertical three-layer soil

The arrangement measurement electrodes were analyzed numerically to measure the grounding resistance of grounding systems in vertical layer soil. The proper placement of potential electrodes for different measurement directions was obtained for grounding systems in different types of soil. The measurement errors of the 0.618 method to measure grounding resistance for different measurement directions are also discussed. The analysis results show that suitable measurement method must be based on the actual soil and grounding system structures when choosing the placement of potential electrodes. The error between the measured results and real grounding resistance can be predicted with the method. The analysis results provide a very useful reference for electrical engineers.