This project presents a new control scheme for three-level neutral point clamped (NPC) based PWM ac/dc/ac converter. The direct power control (DPC) for front-end three-level PWM rectifier and direct torque control (DTC) for back-end three-level PWM inverter-fed induction motor are adopted respectively. A power feed-forward control loop from inverter to rectifier side is introduced to obtain better dynamic performance for the dc-link. Simulation results show that with the proposed control scheme, the three-level NPC based PWM ac/dc/ac converter exhibits excellent dynamic performance, and can minimize dc-bus voltage fluctuations.
INDRANIL SAAKI (2020). Direct Power and Torque Control for 3-level NPC Converter (https://www.mathworks.com/matlabcentral/fileexchange/73457-direct-power-and-torque-control-for-3-level-npc-converter), MATLAB Central File Exchange. Retrieved .