Performance evaluation of fault-tolerance operation of three-phase voltage source rectifier with predictive control

Abstract

Three phase voltage source rectifiers (VSRs) have been widely utilized to realize AC-DC power conversion over the past decades. Nevertheless, VSR switch devices such as Insulated Gate Bipolar Transistors (IGBTs) and Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFETs) are prone to fault, as a result of thermal dissipation problem. In order to solve this issue, a fault-tolerant three-phase VSR topology is proposed to deal with the open-circuit faults in this paper. The topology of the proposed VSR is a six-switch three-phase VSR (SSTP-VSR) under common operation and will be reconstructed into a four-switch three-phase VSR (FSTP-VSRs) for post-fault operation. In addition, a finite control set model predictive control (FCS-MPC) strategy is addressed to handle the unbalance of the dc-link capacitor voltages. Simulation results are conducted to verify the validity of the proposed control strategy.