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Steady-State and dynamic study of one-cycle-controlled three-phase power-factor correction

One-cycle control power-factor correction (OCC-PFC) with vector operation is a promising rectification method that eliminates harmonics and improves the power factor. It features great simplicity, high performance, and excellent stability. This paper performs analysis and design of OCC-PFC in both the steady-state and dynamic transients. The sufficient stability condition for three-phase OCC-PFC is derived. Some typical large-signal perturbations in practice are then used to verify the theoretical predictions. The paper also provides some guidelines for the selection of the circuit parameters in practical application. All analysis results were verified by simulation or experiments based on a three-phase 1-kW pre-industrial OCC-PFC prototype.