There are various ways of grounding, including working grounding, protective grounding, protective neutral grounding, and repeated grounding.
For example:
Working grounding: In low-voltage power systems using 380/220V, the neutral point of the system is usually directly grounded to reduce the risk of one phase grounding and stabilize the system's potential
Protective grounding: Connect the metal casing of electrical equipment, the structure of distribution equipment, etc. to the ground to prevent the metal casing of electrical equipment from being electrified and endangering personal and equipment safety
Protective grounding: Connect the metal parts of the equipment that are not charged under normal circumstances directly to the system to ensure personal safety and prevent electric shock accidents
By taking these measures, the stable operation of the power system and personnel safety can be effectively ensured.