1、 Why should reactive power compensation be carried out?        Reactive power is by no means useless power. In the AC power supply system, inductance and capacitance are essential loads, such as ferromagnetic loads such as motors and transformers. If there is no excitation of inductive reactive power, the equipment cannot work normally. For example, the line itself that transmits power at a fixed distance is a capacitive load. As long as it is transmitting power, it will be equivalent to the capacitor working. In other words, in the AC power supply system, the existence of reactive power is of great significance to the transmission and exchange of energy, which is indispensable, or the exchange system without reactive power can not work normally.