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Dead beat control of three phase PWM rectifier using virtual flux based Direct Power Control (DPC) and with no line voltage measurements

This paper presents a new Predictive Direct Power Control (PDPC) of three phase PWM rectifier using dead beat control. The method is developed in both stationary and rotating reference frames. Furthermore an algorithm is presented to remove the sensors for measuring the line voltage values and therefore the reliability of the system becomes better. In return, Virtual Flux (VF) vector instead of the line voltage vector is used which improve the performance of the system under unbalanced and specially harmonic conditions of the supply network. But these benefits could be earn in the cost of the higher calculation burden and more complicated control procedures. The method is tested using MATLAB/SIMULINK on a typical three phase PWM rectifier in both reference frames and under different conditions of the supply network and dc load. It is presented that the stability of the rectifier preserved under extreme changes of the dc load and also the quality of waveforms remains high under harmonic conditions of the network.