Predictive Direct Power Control for Three-phase Voltage Source PWM Rectifiers

Predictive direct power control(P-DPC) applied to voltage source pulse-width-modulation(PWM) rectifier was introduced in this paper.Based on the model of power prediction,voltage vectors were selected according to minimizing power errors in a fixed time interval,which results in a constant switching frequency control for P-DPC.It simplifies the implementation of P-DPC procedure by selecting switching states based on the principle of space vector modulation(SVM).In order to eliminate power errors caused by control delay,a detailed control delay compensation scheme was designed.Experimental results based on a 2kW prototype were presented,which showing that P-DPC has a faster power response compared to standard voltage-oriented-control(VOC) techniques.Besides,the dynamic performance of the system is also improved significantly by control delay compensation.