Fig. 1. Modular multilevel converter system.
Fig. 2. Single-phase equivalent circuit.
Fig. 3. Block diagram of the conventional PQ control based on PI controller.
Fig. 4. Block diagram of the proposed predictive based direct power control.
Fig. 5. Simulation waveforms of the conventional PQ control based on PI controller. (a) Bandwidth=200Hz, (b) Bandwidth=1kHz.
Fig. 6. Simulation waveforms of the proposed predictive based direct power control.
Fig. 7. Simulation waveforms of the proposed predictive based direct power control with parameters(Lo and Ro) error. (a) +50% error, (b) -50% error.
TABLE I SIMULATION CONDITION
참고문헌
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