Predictive Control Strategy of Power Electronic Traction Transformer for Fault Tolerance Condition

In this paper, a predictive control strategy of power electronic traction transformer for fault tolerance condition is proposed to ensure the safe operation of the system after fault. The working principle and the fault-tolerant method for H-bridge and dual active bridge are introduced first as the basis. Then the predictive control strategy is illustrated. Based on the analysis, the predictive control combined strategy fault-tolerant method is proposed, which can effectively solve the problem of power distribution between the fault-tolerant module and the normal working module, maintain the voltage balancing and ensure the stable operation of the power electronic traction transformer. The experiment results are given to show the efficiency and correctness of the proposed strategy.