Summary of diagnosis methods for the integrity of grounding grid

The grounding grid is an important measure to maintain the safe operation of power system and to ensure the safety of staff and electrical equipments. The size of the grounding resistance can indirectly reflect if the grounding grid is intact. First, the principle, the key technology and the present research situation of a variety of grounding resistance detection methods are introduced and analyzed. Second, the principle of a variety of grounding grid fault diagnosis methods is introduced and analyzed.