Predictive-control based low-voltage-ride-through method for a grid-tied inverter

A Model Predictive Control (MPC) method for a Grid-Tied Inverter with Zero-Voltage-Ride-Through (ZVRT) Capability, comprising:

• calculating, by a controller, at a kth sampling instant, a current reference i*(k+1) using Pref (real-power reference) and Qref (reactive power reference)
• measuring, by the controller, at the kth sampling instant, a grid current, ig(k) predicting, by the controller, a future current value with a plurality of possible vectors, wherein the future current value is predicted using a predicted grid voltage rather than a measured grid voltage;
• evaluating, by the MPC controller, each of the plurality of possible vectors, in a cost function;
• selecting, by the controller, a voltage vector to minimize the cost function;
• and
• generating, by the controller, gate signals for the inverter using the selected voltage vector.