Fault Tolerant Three Level ANPC Inverter Circuit with Finite Set Model Predictive Control

An improved active neutral point clamped (ANPC) inverter circuit topology is proposed. Through the fault-tolerant leg, the fault-tolerant performance of the inverter circuit has been greatly improved. The fault-tolerant leg works as an actuating device which control the neutral point to remain stable, when there is no fault with the inverter. When some power tubes are broken the leg works as the redundant device to replace the power tubes. The finite set model predictive control method is used for this inverter circuit. This control method is quite suitable for the electronic circuit. This method is employed to lower THD and to advance its dynamic, so that the error tolerance and high power output of the aviation inverter are satisfied. The feasibility and effectiveness are proved by simulations. (paper)