不同接地装置类型下接地电阻测量研究

Study on Measurement of Grounding Resistance Under Different Types of Grounding Devices

接地电阻的测量对电力系统供电质量起着至关重要的作用。传统的三极直线法受电磁感应、土壤电阻率不均匀的影响,测量误差较大。通过理论计算分析得出:对于中小型接地装置,采用等边三角形法测量接地电阻;对于大型接地装置,测试电气完整性来保证接地电阻满足设计要求。该测量方法可推广应用于所有的接地电阻测试。

The measurement of ground resistance plays a vital role in power supply quality.The traditional tri-pole linear method is affected by electromagnetic induction or uneven soil resistivity,so the measurement error is large.In this paper,theoretical calculation and analysis pointes out that the equilateral triangle method is used to measure the grounding resistance of the small and medium-sized grounding device.For large grounding devices,testing electrical integrity to ensure that the grounding resistance meets the design requirement.This measurement method can be extended to all ground resistance tests and has great application value.