Integrating the Behavior at Reactive Power Flow in the Model of the Single-Phase PWM Rectifier

In this paper, a novel method of modeling the behavior of a single-phase full-bridge PWM rectifier is proposed. The model offers a general perspective of the operation of the converter, regardless the active or reactive power level at the converter's input. The general steady-state models of the converter at unity power factor and at negative power flow are correlated using an averaging coefficient, derived from the interpretation of the average input power variation with respect to the phase shift between the voltage and current. The resulting expressions offer a more flexible approach in examining the converter's behavior when operating at non-unity power factor, concerning the implementation, and designing of a proper control strategy.