Predictive current control of a current-source inverter with active damping method

This paper presents a predictive current control strategy with active damping method applied to a current source inverter. This control strategy uses a discrete-time model of the system to predict the future value of the grid current for all possible current vectors generated by the inverter. According to a cost function that minimizes the errors of the predicted grid current and the reference grid current, the current vector at the next sampling time is determined. To suppress the LC resonance in the current source inverter, active damping method using virtual harmonic resistor is adopted. The performance of the proposed control method is compared with the conventional trilogic pulse width modulation control. Simulation results show that the predictive current control with active damping method has an excellent steady-state response as well as an extremely fast dynamic response compared with the conventional method.