This paper describes control techniques for PWM rectifiers. In particular, the so-called virtual-flux oriented control (VFOC) and virtual-flux based direct power control (VF-DPC) schemes are described and compared with their voltage based counterparts, that is, the voltage oriented control (VOC) and voltage-based direct power control (DPC) techniques. Theoretical background is provided, and results of computer simulations are given, documenting advantages and disadvantages of the individual control strategies. Moreover, paper proposes a novel and simple direct power control of three-phase PWM rectifiers with constant switching frequency using space vector modulation (DPC-SVM), which combines VFOC with VF-DPC. The steady state and dynamic results of DPC-SVM that illustrate the operation and performance of the proposed system are presented. It is shown that DPC-SVM exhibits several positive features as: simple algorithm, good dynamic response, constant switching frequency and particularly provide sinusoidal line current when supply voltage is no ideal. Results have proven excellent performances and verify the validity of the proposed system.
| Filename: | EPE Journal 13-2 - 3 - Paper Malinowski |
| Filesize: | 354.6 KB |
