Fig. 2. Rotating reference frame(RRF) current controller for single phase GCIs.
Fig. 4. Simplified block diagram of a current controller.
Fig. 6. Block diagram of the conventional harmonic compensation method in RRF.
Fig. 7. FFT analysis of 3rd harmonic in SRF and RRF.
Fig. 8. Block diagram of the selective harmonic compensation method in RRF.
Fig. 9. Block diagram of the proposed harmonic compensation method.
Fig. 10. Simplified block diagram of the proposed harmonic compensation method.
Fig. 12. Bode plot of the open loop gain T(s) with and without harmonic compensator.
Fig. 13. Bode plot of the closed loop gain with and without harmonic compensator.
Fig. 20. Comparison of the conventional and the proposed harmonic compensator. (a) 3rd harmonic reduction, (b) harmonic reduction rate, (c) Total Harmonic Distortion.
Fig. 1. Stationary reference frame(SRF) current controller for single phase GCIs.
Fig. 3. Control block diagram of a current controller in RRF.
Fig. 5. Simulation result of a current controller without a harmonic controller at 5kW.
Fig. 11. Bode plot of the harmonic compensator at different h values.
Fig. 14. Simulation results of a conventional harmonic compensation method at 5kW.
Fig. 15. Simulation results of the proposed harmonic compensation method at 5kW.
Fig. 16. Experimental setup of the SPGCI.
Fig. 17. Experimental results without a harmonic controller at 5kW.
Fig. 18. Experimental results with a conventional harmonic controller at 5kW.
Fig. 19. Experimental results with the proposed harmonic controller at 5kW.
TABLE I SYSTEM PARAMETER FOR SINGLE PHASE GRID CONNECTED INVETER
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