An Adaptive Predictive Current-Controlled PWM Strategy for Single-Phase Grid-Connected Inverters

The three major approaches for current-regulated inverters are ramp comparison, hysteresis control, and predictive current control. From these three, predictive current control offers the potential for achieving more precise current control with minimum distortion and harmonic noise. The traditional predictive current controller has a poor performance under component parameter variations, and is less adaptive to filters inductance mismatch. An adaptive predictive current control strategy was proposed and studied. Both simulations and experimental results show that the proposed method is much more adaptive to parameter mismatch than the traditional one.