A robust PWM control for a three leg shunt active power filter

The parallel active power filters are more and more used these last years because of their importance to compensate the current harmonics and the reactive power. However, the classical control strategies use for PWM regulation of a shunt active power filter is a classical PI regulator. The problem with this controller is that its operation is affected if the parameters of the shunt active power filter change. To solve this problem, a robust PWM controller to improve its performance will be used in this paper. Simulation results will show its efficiency when the parameters change.