在了解电压互感器消中性点谐器的作用之前,我们不妨先探讨一下电力系统的中性点运行方式。
Before we know the function of neutral point harmonic eliminator of voltage transformer, we might as well discuss the neutral point operation mode of power system.
在三相交流电力系统中，作为供电电源的发电机和变压器的中性点，有三种运行方式:一种是电源中性点不接地;一种是电源中性点经消弧线圈接地;一种是电源中性点直接接地。前两种合称为中性点非有效接地，或小电流接地系统，后一种中性点直接接地称为中性点有效接地，或大电流接地。
In three-phase AC power system, as the neutral point of generator and transformer of power supply, there are three operation modes: one is that the neutral point of power supply is not grounded; the other is that the neutral point of power supply is grounded by arc suppression coil; the other is that the neutral point of power supply is directly grounded. The first two kinds of grounding are collectively called neutral point non-effective grounding, or small current grounding system. The second kind of neutral point direct grounding is called neutral point effective grounding, or high current grounding