Model Predictive Control For A PLL-Less SiC Grid-Tied Inverter With Zero-Voltage-Ride-Through Capability

A finite-control-set model-predictive-control (FCS-MPC) is proposed for a SiC three-phase grid-tied inverter. Compared to the state-of-the-art grid-tied control methods, the proposed MPC can achieve fast dynamics control and zero-voltage-ride-through (ZVRT) capability without phase-locked loop (PLL) and voltage sensors. The operation principles of the proposed voltage sensor-less and PLL-less MPC method are presented with the Lyapunov-based stability analysis. The proposed MPC is firstly simulated and compared with traditional control method using voltage sensors and PLL. It is then implemented on a 10kW SiC inverter prototype with 50kHz sampling frequency in the experiment. The simulation and the experimental results validate the effectiveness and advantages of the proposed MPC method.