VOLTAGE ORIENTED CONTROL – SIMULATION
, voltage controller active conductance , voltage controller
0.0028 2.8216e 005 0.0355
Table 3.10 : Simulation4 – modified parameters
The Simulink diagram is given in APPENDIX F, Figure 0.41.
SIMULATION5 – ESTIMATED PARAMETERS
For simulation5, we now assume that
. One by one, we modify
(increase and decrease) the estimated value and verify the effect on the waveforms.
Â Resistance influence A couple of tests have been done and we didn’t see any problem due to a bad estimation of the line resistance.
No visible influence , instability No visible influence
Table 3.11 : Resistance influence
Â Inductance influence
See Figure 0.30 in APPENDIX F. Distorted reference voltage Vdc oscillations See Figure 0.31 in APPENDIX F. Distorted reference voltage Vdc oscillations Distorted line current
Table 3.12 : Inductance influence
Â Capacitor influence
See Figure 0.32 in APPENDIX F.
Line current oscillation Vdc oscillation No visible influence
Table 3.13 : Capacitor influence
Â Conclusion As we can see in the previous tables, inductance and capacitor estimation are more critical than resistance estimation. Nevertheless, we saw in simulation that a bad estimation with an error about 20 40% is not problematic. The waveforms are pretty similar.