A Simplified Digital Predictive Current Control for T-Type Three-Phase Three-Level Inverters

Traditional predictive control for T-type three-phase three-level inverters is hindered by laborious weighting factor modification and a significant computational workload, which involve the evaluation of twenty-seven voltage vectors. To address these drawbacks, this article presents a simplified predictive control scheme that omits the need for coefficient weighting. Furthermore, based on the boundary conditions and effects of redundant small voltage vectors, only three candidates of voltage vectors are used to evaluate the cost function, which both relieves the computation burden and achieves neutral-point voltage balance. Finally, a simulation is conducted to authenticate the proposed methodology.