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Autor(es)
Prajapati, Dharmikkumar; Dekka, Apparao; Ronanki, Deepak; Rodriguez, Jose |
ISSN:
0885-8993 |
Idioma:
eng |
Fecha:
2023 |
Tipo:
Artículo |
Revista:
IEEE Transactions on Power Electronics |
Datos de la publicación:
vol. 39 Issue: no. 3 Pages: 3329-3338 |
DOI:
10.1109/TPEL.2023.3342756 |
Descripción:
Publisher Copyright: IEEE |
Resumen:
The conventional finite control-set model predictive control (FCS-MPC) methods need a cost function with weighting factors to minimize the common-mode voltage (CMV) in the multilevel inverter (MLI) fed electric drive systems. Moreover, these methods require a higher sampling time for real-time implementation, resulting in a rich harmonic content in the inverter ac currents. This article addresses these concerns by proposing a low-complexity FCS-MPC with CMV minimization for a five-level inverter (FLI). The per-phase philosophy is adopted in the design and implementation of the proposed FCS-MPC for an FLI, resulting in a maximum number of predictions of 6 per phase only (a total of 18 predictions in a three-phase FLI system). Moreover, the proposed FCS-MPC minimizes the CMV without using a cost function, leading to superior current harmonic performance. Additionally, Heun's integration method is introduced in the formulation of discrete-time models of the FLI, and they are used in real-time implementation of the proposed FCS-MPC. The superiority of the proposed method is demonstrated through a dSPACE-controlled FLI laboratory prototype. Furthermore, a comparative analysis of the proposed and the conventional FCS-MPC methods is presented in terms of total demand distortion (TDD) of the current, inverter CMV, and the computational burden. The conventional finite control-set model predictive control (FCS-MPC) methods need a cost function with weighting factors to minimize the common-mode voltage (CMV) in the multilevel inverter (MLI) fed electric drive systems. Moreover, these methods require a higher sampling time for real-time implementation, resulting in a rich harmonic content in the inverter ac currents. This article addresses these concerns by proposing a low-complexity FCS-MPC with CMV minimization for a five-level inverter (FLI). The per-phase philosophy is adopted in the design and implementation of the proposed FCS-MPC for an FLI, resulting in a maximum number of predictions of 6 per phase only (a total of 18 predictions in a three-phase FLI system). Moreover, the proposed FCS-MPC minimizes the CMV without using a cost function, leading to superior current harmonic performance. Additionally, Heun's integration method is introduced in the formulation of discrete-time models of the FLI, and they are used in real-time implementation of the proposed FCS-MPC. The superiority of the proposed method is demonstrated through a dSPACE-controlled FLI laboratory prototype. Furthermore, a comparative analysis of the proposed and the conventional FCS-MPC methods is presented in terms of total demand distortion (TDD) of the current, inverter CMV, and the computational burden. |
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