文档介绍：中性点接地方式(Neutral grounding mode)
Neutral point operation mode of power system update time
Abstract: neutral grounding oground is also possible that the so-called gap arc, arc quenching fire and periodically renewed. Because the grid is an inductive and capacitive oscillation circuit, the intermittent arc overvoltage caused by relatively, the value of (2. 5~3) UX, this will be transmitted to the ground overvoltage has a direct electrical connection of the whole network, more likely to cause another relative to breakdown, and the formation of the two phase to ground fault.
In the voltage of 3-10KV power network in one phase ground when the capacitor current does not allow more than 30A, otherwise, the arc cannot extinguish, in power network 20-60KV voltage level, intermittent arc caused by excessive voltage, a greater value, for no insulation is more dangerous, but due to the higher voltage, arc more difficult to extinguish, therefore, in the power grid, a specified phase ground current shall not exceed 10A.
1. 2 Petersen coil grounding system
When the grounding capacitance current exceeds the allowable value, with neutral point via arc suppression coil grounding method to solve the system, namely the arc suppression coil grounding system for neutral point.
The neutral point of the arc suppression coil grounding mode, namely between the neutral point and the ground connected