高精度磁场测试技术在接地网腐蚀检测中的应用探讨

Discussion on Application of High Precision Magnetic Field Testing Technology in Grounding Grid Corrosion Detection

针对使用钢材制作接地网易产生腐蚀而导致寿命更短,变电站需定期检测接地网是否存在缺陷的问题,设计了一套用于接地网缺陷的高精度磁场测试装置。通过对某35kV变电站接地网的检测,验证了该装置的精度和灵敏度良好,可靠性高,可定位接地网缺陷的位置。

The corrosion life of stainless steel grounding grids which are easy to be corroded is shorter. Substations need to check regularly whether there are defects in grounding grids. In this paper, a set of high precision magnetic field testing device for grounding grid defects is designed, which had good accuracy and sensitivity and could locate the location of grounding grid defects. The reliability of the device is verified by testing the grounding grid of a 35kV substation.