An analysis of shunt active power filter based on instantaneous reactive power theory

Shunt Active Power Filter is an ideal device that could manage the harmonic compensation in an adjustable and dynamic manner. This article reviews the basic principle of shunt active power filter, along with the current tracking circuit based on the instantaneous reactive power theory and the main circuit performing as an inverter with PWM hysteresis control. A comprehensive control method is analyzed and a harmonic compensation simulation is conducted, the result of which verifies the harmonic detection algorithm is well-proposed and the power quality of the grid is overall-enhanced.