The main functions of reactive power compensation devices are as follows:

Improve power factor: reduce the flow of reactive power in the power grid, increase the power factor of the power system, reduce transmission line losses, and improve the transmission efficiency of the power grid.
Improving voltage quality: stabilizing grid voltage, reducing voltage fluctuations and flicker, improving power quality, and ensuring the normal operation of power equipment.
Increase the transmission capacity of the power grid: Improve the active power transmission capacity of the power grid, enabling it to deliver more active power and meet the demand for load growth.
Reduce electricity costs: Reduce the loss of reactive power, lower electricity bills, and improve the economy of the power system.
In short, reactive power compensation devices play an important role in the power system, which can improve the operational efficiency and economy of the power system, ensure the quality of electricity and the safe and stable operation of power equipment.