VOLTAGE ORIENTED CONTROL – SIMULATION
Ua Ub Uc are line voltage ;
Ed Eq are the dq transformation of Ua Ub Uc.
Em (V), ph to gnd amplitude (=Ed)
Id*step (A) at 0.025s
Fsw (kHz), switching frequency
Figure 3.13 : Block diagram for current control tests
Remark : The tests can also be simulated in dq but we’ve decided to stay in ABC frame to model the rectifier and the grid impedance to be as close as possible to the real system.
Table 3.1 : Current controller simulation parameters
is selected equal to .
The Simulink block diagram is available in APPENDIX B B.1, Figure 0.7. We also advice to read
the simulation of coordinate transformation in APPENDIX A A.4 before.
The bandwidth of the current controller have been selected at :
take a decade smaller than the switching frequency).
(we chose to
The system have been simulated in continuous and discrete (only the continuous simulation is shown here). No saturation or anti windup are present in this simulation. They will be added later.
PI controller, Kpi PI controller, Kii