Low-complexity Repetitive Double-Vector Model Predictive Control Optimization Strategy for T-type Three-level Converter

Conventional multi-vector model predictive control (MV-MPC) for three-level converters suffers from high computational complexity and low optimal voltage-vector (VV) tracking accuracy, resulting in poor overall performance of converter. To address these issues, this paper proposes a low-complexity r...

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Bibliographic Details
Published in:IEEE transactions on power electronics pp. 1 - 13
Main Authors: Fang, Jian, Li, Ruihua, Wang, Hanqing, Sun, Chenwei, Hu, Bo
Format: Journal Article
Language:English
Published: IEEE 2025
Subjects:
Accuracy
Bandwidth
Computational complexity
Cost function
Harmonic analysis
low computational complexity
multi-vector model predictive control
optimal voltage-vector tracking
Optimization
Predictive control
Space vector pulse width modulation
Switches
three-level converter
virtual voltage-vector synthesis
Voltage control
ISSN:0885-8993, 1941-0107
Online Access:Get full text
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Summary:Conventional multi-vector model predictive control (MV-MPC) for three-level converters suffers from high computational complexity and low optimal voltage-vector (VV) tracking accuracy, resulting in poor overall performance of converter. To address these issues, this paper proposes a low-complexity repetitive double-vector model predictive control (LC-RDVMPC) optimization strategy for T-type three-level converters. To overcome the limited control bandwidth of conventional MV-MPC, this paper presents a SVPWM-sector identification method. Through constructing assistant lines to rapidly locating the sector of reference VV, this method reduces the times of cost function calculation and virtual VVs synthesis, decreasing the computational complexity of MV-MPC and improving the bandwidth of control system. Moreover, a repetitive double-vector synthesis method is proposed for synthesizing virtual VV in two steps. An auxiliary VV is generated firstly, and then virtual VV with capability of covering the whole output voltage range is synthesized, which improves the optimal VV tracking accuracy of MV-MPC. Finally, the effectiveness of the proposed method is verified through experiments.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2025.3626673