This work presents an advanced control scheme for a single-phase PWM rectifier. The controller consists of the PR (Proportional-Resonant) controller using the double sampling strategy, namely, dual update scheme, and the delayless feed-forward compensator. The PR controller is capable of regulating a sinusoidal line current without an additional prediction or an extremely high control gain under a medium switching frequency (0.5∼5kHz). The dual update scheme is the method performing the

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... and the control calculation twice in a switching period, which reduces the control time delay significantly and enables us to extend the maximum allowable control bandwidth without increasing the switching frequency. The proposed feed-forward compensator uses the estimated and one-step predicted value of the source voltage and the source current to avoid the adverse effects caused by the one-step delay, measurement noise, and harmonic component of the source voltage in the feed-forward compensation process. A very fast phase angle estimator is also presented, which is capable of estimating the phase angle and the frequency of the source voltage even under a highly distorted line voltage condition or a sudden amplitude, phase angle or frequency changing condition. The feasibility of the proposed control scheme is confirmed by simulation study.