TY - JOUR
T1 - A Simplified Optimal Switching Sequence Model Predictive Control Without Weighting Coefficients for T-Type Single-Phase Three-Level Inverters
AU - Chen, Shengwei
AU - Yang, Yong
AU - Fan, Mingdi
AU - Chen, Rong
AU - Xiao, Yang
AU - Wen, Huiqing
AU - Wu, Weimin
AU - Hu, Jiefeng
AU - Zhang, Xinan
AU - Rodriguez, Jose
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2024
Y1 - 2024
N2 - This article proposes a simplified optimal switching sequence model predictive control (OSS-MPC) without weighting coefficients for off-grid T-type single-phase three-level inverters. To eliminate the tedious weight-tuning process when constructing the switching sequences, the different effects of redundant small voltage vectors on the upper and lower dc bus capacitors' voltages are considered. Each switching sequence consists of two symmetrical redundant small voltage vectors with opposite effects on dc bus capacitors' voltages so that the neutral point voltage balance of the inverter can be achieved by tuning the dwelling time of two redundant small voltage vectors with opposite effects. According to the different effects of the switching sequence, the candidate switching sequences can be obtained by a simple division of the switching sequences through the reference. Then, the OSS can be selected by minimizing a cost function, which considerably simplifies the optimization process. Finally, the effectiveness of the proposed simplified OSS-MPC algorithm is experimentally evaluated based on a laboratory prototype in terms of code execution time, steady-state performance, transient performance, and neutral point potential balance performance.
AB - This article proposes a simplified optimal switching sequence model predictive control (OSS-MPC) without weighting coefficients for off-grid T-type single-phase three-level inverters. To eliminate the tedious weight-tuning process when constructing the switching sequences, the different effects of redundant small voltage vectors on the upper and lower dc bus capacitors' voltages are considered. Each switching sequence consists of two symmetrical redundant small voltage vectors with opposite effects on dc bus capacitors' voltages so that the neutral point voltage balance of the inverter can be achieved by tuning the dwelling time of two redundant small voltage vectors with opposite effects. According to the different effects of the switching sequence, the candidate switching sequences can be obtained by a simple division of the switching sequences through the reference. Then, the OSS can be selected by minimizing a cost function, which considerably simplifies the optimization process. Finally, the effectiveness of the proposed simplified OSS-MPC algorithm is experimentally evaluated based on a laboratory prototype in terms of code execution time, steady-state performance, transient performance, and neutral point potential balance performance.
KW - Model predictive control
KW - T-Type single-phase three-level inverters
KW - no weighting coefficient
UR - http://www.scopus.com/inward/record.url?scp=85174858788&partnerID=8YFLogxK
U2 - 10.1109/TTE.2023.3323460
DO - 10.1109/TTE.2023.3323460
M3 - Article
AN - SCOPUS:85174858788
SN - 2332-7782
VL - 10
SP - 5936
EP - 5946
JO - IEEE Transactions on Transportation Electrification
JF - IEEE Transactions on Transportation Electrification
IS - 3
ER -