X hits on this document

PDF document

Master of Science Thesis in Electric Power Engineering - page 70 / 114

381 views

0 shares

3 downloads

0 comments

70 / 114

VOLTAGE ORIENTED CONTROL – SIMULATION

PARAMETER MODIFICATION

VALUE

, 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.

 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.

Tests with

equal to…

Comments

No visible influence , instability No visible influence

Table 3.11 : Resistance influence

 Inductance influence

Tests with

equal to…

Comments

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

 Capacitor influence

Tests with

equal to…

Comments

See Figure 0.32 in APPENDIX F.

Line current oscillation Vdc oscillation No visible influence

Table 3.13 : Capacitor influence

 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.

61

Document info
Document views381
Page views389
Page last viewedSun Dec 11 10:19:48 UTC 2016
Pages114
Paragraphs2263
Words17018

Comments