Current based open-circuit fault diagnosis and fault-tolerant control for two-level power converters with direct model predictive control

Model predictive control (MPC) is a promising alternative for power electronics and electric drives. Research on fault diagnosis and fault-tolerant control for power converters with MPC is insufficient. Accurate fault diagnosis and fault-tolerant control solutions with easy implementation are very desirable. In this work we propose a novel current based fault diagnosis method of one-and two-phase open-circuit fault of machine-side converter in advanced back-to-back four-quadratic drive topologies, which is highly immunized from false alarm. The fault-tolerant control scheme can be easily embedded into normal MPC control algorithm. Simulation results validate the feasibility of proposed fault diagnosis and fault-tolerant control methods.