The function of the IGBT inverter is to support utility fundamental voltage and to compensate the reactive power. The MOSFET inverter fulfills the function of harmonic current compensation.

Then through a example, it verifies the effects of SVG on the reactive power compensation and voltage fluctuation suppression.

Research shows the SVG can effectively compensate reactive power and govern power factor of the grid the voltage fluctuation when the chargers work in the charging process.