Through PSPICE simulation, feasibility and validity of the novel system controller for a voltage-mode grid-tie inverter with active power factor correction was verified using a single stage of DC-to-AC power conversion. Active power factor correction between the grid voltage and current was achieved by a proper phase-shift control method which is very effective.
Furthermore, simulation results with and without the harmonic cancellation circuit demonstrated the control effectiveness and the ability to eliminate or significantly reduce the amount of harmonic content in the grid voltage and current, particularly at the third or higher harmonic frequencies. Finally, the 0- ADC regulation controller was also validated through the simulation which shows that the inverter output current possesses no DC component, which, in turn, prevents
magnetic saturation from occurring in the inverter isolation
transformer.