The Static Var Generator (SVG) is a high-end reactive power compensation device based on power electronics technology. It first detects the grid voltage and load current in real time through a current sensor, separates the “active current component” and “reactive current component” from the load current, calculates the magnitude and direction of the reactive current to be compensated, and generates a “compensation current command”.

Then, the IGBT inverter unit generates a capacitive or inductive fundamental wave current with “equal amplitude and opposite phase” to cancel out the reactive current, thereby achieving the purpose of dynamic reactive power compensation.