Single Loop Voltage Control Strategy Based on Model Predictive Control for NPC-UPS

Abstract UPS can provide stable electrical energy for sensitive loads when severe grid disturbance happens. A neutral point clamped (NPC) three-level voltage source converter is used as the circuit topology UPS. In this study, discrete mathematical model of derived and a single loop control strategy based on predictive presented. The proposed method has simple structure fast response speed omits current inner modulator. Furthermore, it achieve ac balance dc-side voltages. simulation set up in PSCAD, efficacy verified by means results under various types loads.