中性点经小电阻接地和经消弧线圈接地的区别主要体现在结构、工作原理、优缺点以及适用场景等方面。‌‌
The difference between grounding the neutral point through a small resistor and grounding through an arc suppression coil mainly lies in the structure, working principle, advantages and disadvantages, and applicable scenarios. ‌‌
结构和工作原理
Structure and working principle
‌中性点消弧线圈接地‌：在这种方式下，消弧线圈被接入中性点和大地之间。当系统发生单相接地故障时，消弧线圈的电感电流会补偿接地电容电流，使流过接地点的电流减小到能够自行熄弧的范围。这种方式可以允许系统在单相接地故障下继续运行一段时间，从而提高供电的可靠性。
Neutral point arc suppression coil grounding: In this way, the arc suppression coil is connected between the neutral point and the ground. When a single-phase grounding fault occurs in the system, the inductance current of the arc suppression coil compensates for the grounding capacitance current, reducing the current flowing through the grounding point to a range that can extinguish the arc on its own. This method allows the system to continue operating for a period of time under single-phase grounding faults, thereby improving the reliability of power supply.
‌中性点小电阻接地‌柜：在这种方式下，中性点通过一个小电阻接地。当系统发生单相接地故障时，故障电流通过小电阻流入大地，导致断路器迅速跳闸，从而快速切除故障。这种方式能够抑制谐振过电压，并且设备绝缘水平要求较低，但可能会影响通信设备的电磁兼容性。
Neutral point small resistance grounding cabinet: In this way, the neutral point is grounded through a small resistance. When a single-phase grounding fault occurs in the system, the fault current flows into the ground through a small resistor, causing the circuit breaker to trip quickly and quickly cut off the fault. This method can suppress resonance overvoltage and requires low insulation level of the equipment, but it may affect the electromagnetic compatibility of communication equipment.