Abstract:
This thesis studies the use of a predictive current control technique for three-phase converters. The strategy of the predictive control is to force the d-q current component to reach the predicted referent current within a predetermined sampling time. Hence, this technique is also known as a deadbeat predictive control. This technique makes the design of the current control loops very simple because no tuning parameter is needed. However, a drawback is that the steady state error of the controlled currents cannot be achieved in the presence of the model error. Therefore, this thesis proposes an integral deadbeat predictive control to overcome this problem. Also, the current control loop using PI-controller is also studied for comparison. In all case studies, the DC bus voltage is controlled by a PI-controller designed using pole placement technique. The simulation and experimental results show that all the control techniques give almost the same control performances. However, the deadbeat predictive control is easy to design while the integra predictivel deadbeat control needs to be detuned in order to make the system robust.