Abstract
The finite-control-set model predictive control (FCS-MPC) method is promising for cascaded H-bridge (CHB) rectifiers. However, three issues arise in the traditional FCS-MPC method: heavy computational burden, low steady-state performance, and time-consuming tuning work of weighting factor. Although some modified FCS-MPC methods have been proposed for CHB rectifiers, there is an open task to solve all aforementioned issues simultaneously. Here, a novel FCS-MPC method has been proposed for a single-phase CHB rectifier. In proposed method, the computational burden is reduced from exponential time to linear time. The steady-state performance is improved by selecting an optimal combination of two output voltages along with their duty cycles. The weighting factor is eliminated by using a hierarchical control structure. The proposed method has been tested and evaluated against three existing FCS-MPC methods on a single-phase three-cell CHB rectifier.
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