《《Predictive Current Control of a Voltage Source Inverter》.pdf

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 54, NO. 1, FEBRUARY 2007 495 Predictive Current Control of a Voltage Source Inverter José Rodríguez, Senior Member, IEEE, Jorge Pontt, Senior Member, IEEE, César A. Silva, Member, IEEE, Pablo Correa, Pablo Lezana, Member, IEEE, Patricio Cortés, Student Member, IEEE, and Ulrich Ammann Abstract— This paper presents a predictive current control used in current control for inverters [6], [7], as well as for recti- method and its application to a voltage source inverter. The fiers and active filters [8]. A variation to this method calculates method uses a discrete-time model of the system to predict the the duty cycle of the PWM pulses necessary for the current con- future value of the load current for all possible voltage vectors trol [9], [10]. generated by the inverter. The voltage vector which minimizes a quality function is selected. The quality function used in this work One advantage of predictive control is the possibility to in- evaluates the current error at the next sampling time. The per- clude nonlinearities of the system in the predictive model, and formance of the proposed predictive control method is compared hence calculate the behavior of the variables for different con- with hysteresis and pulsewidth modulation control. The results duction states. This property was exploited in an earlier study show that the predictive method controls very effectively the load current and performs very well compared with the classical [12], where predictive control was used to minimize