Model Predictive Control of Three-phase Grid-connected Voltage Source Inverter with LCL Filter

This paper presents a discrete model predictive control (DMPC) to realize the direct current control of three-phase grid -connected Voltage Source Inverter (VSI) with LCL filter. The DMPC is designed in rotational synchronous frame, thus a long horizon can be adopted to guarantee the stability of the system. Laguerre functions are used to model the control sequence in order to reduce computation burden. The proposed control method can obtain good performance in steady and dynamic states even with distorted grid voltage, as well as robustness to parameter mismatch and grid voltage sags.