With the vigorous development of the country's overall power grid today, the single-phase grounding current of copper braided wires also increases, which can also threaten the safety of equipment. For this reason, the 10kV single power supply is radiated or tree-shaped, and the copper woven wire must be transformed into the ring network dual power supply.
Nowadays, we rely on and consume more and more electricity, and the reliability of power supply to users is no longer guaranteed by single-phase grounding for 2 hours, but by grid layout and power dispatching control.
In addition, due to the demand for the appearance of the city in the construction of modern townships, the 10kV overhead line should be transformed into a cable-based power supply, and the overhead line is the only one, which has become an inevitable trend. Therefore, the neutral point of the 10kV power grid is not grounded or the grounding method of the arc suppression coil will change with the increase of the power load year by year and the change of the power grid layout.