Evaluation of a D-Q-0 Frame Average Model for Multiple Single-Phase PFC Converters

This paper presents a d-q-0 frame average model for multiple single-phase power-factor-correction (PFC) converters. The model is based on a three-phase four-wire load of equivalent per-phase PFC converters, characterized using an extended PWM switch model in order to eliminate the passive diode rectifying stage, thus extending the validity region of the proposed model to half of the switching frequency. The paper presents the complete derivation of the model, as well as a thorough evaluation in the time and frequency domains using simulations and quasi-stationary small-signal analysis. The results obtained show the effectiveness of the proposed model to perform direct d-q-0 frame simulations of multiple single-phase PFC converters, as well its capability to predict dynamic interactions - under balanced and unbalanced conditions - between filtering stages and the PFC converters.

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