Feedforward-Feedback Current Tracking Control with Input Saturation for APF in 3-phase, 4-wire systems

In this paper, an integrated control architecture combining with both feedforward and feedback control is proposed. The feedforward part is used to realize the exact tracking of reference trajectories, and the feedback part drives the output of APF asymptotically converge to reference trajectories. The convergence rate is adjustable by changing the gain of feedback. Furthermore, the inverse Clarke transformation is utilized to map the polyhedral exact trackable region to a cube, which greatly simply the analysis of input limitation. Subsequently, the asymptotic tracking problem is analyzed to show the effects of input saturation on the tracking performance of APF. Simulation results illustrate the effectiveness of the proposed controller