不开挖接地网缺陷诊断研究和应用

Research and Application of Defect Diagnosis of Unexcavated Grounding Grid

一直以来,接地网缺陷诊断的手段都非常繁琐,现有诊断接地网缺陷的常见手段就是依据不同地域的发电站的电气设备运行状态以及土质中的电阻率,结合相关的工作经验对接地导体进行预估,最后再开挖检测。这样的方式不仅工作效率低,受环境的影响也比较大,并不能对地网的故障进行正确的判断。与此同时,由于发变电站承担着国民生活的用电任务,每一次停电开挖都会对国民经济带来很大的损失,这样也就限制了实际的操作性。现阶段的电力系统,对于能够在不开挖接地网、保持电力系统正常运行的情况下,就能够对接地网缺陷进行有效、准确诊断的技术是急切需求的。

The method of diagnosis of grounding network defects has been very cumbersome.The common means of diagnosing the defects of the grounding grid is based on the operating conditions of the electrical equipment of the power station in different regions and the resistivity in the soil,combined with relevant work experience.It is estimated that the excavation test will be carried out at the end.This method not only has low work efficiency,but also has a large impact on the environment,and cannot correctly judge the fault of the ground network.At the same time,since the power station and the substation bear the task of using electricity for the national life,every power outage excavation will bring great losses to the national economy,thus limiting the actual operationality.At present,the power system is an urgent need for an effective and accurate diagnosis of grounding grid defects without excavating the grounding grid and maintaining the normal operation of the power system.