TY - GEN
T1 - An Improved Predictive Control for T-Type 3L Active-Front-Ends with LCL Filters: A Full State-Variable Feedback Solution
AU - Xing, Qianli
AU - Zhang, Zhenbin
AU - Li, Zhen
AU - Li, Yu
AU - Sun, Yuanxiang
AU - Zhang, Zhe
PY - 2021
Y1 - 2021
N2 - T-type three-level power converters have been widely used in distributed power generation systems (DPGSs), particularly for medium-voltage applications. In order to restrain grid-tied current harmonics, LCL filters are usually installed at the converter output side, due to their effectiveness to eliminate high-frequency harmonic. However, the LCL filter is a typical three-order system that includes a potential resonance frequency and may render the system into an unstable situation. To tackle this problem, we propose an improved Finite-Control-Set Model Predictive Control (FCS-MPC), using a full state-variable feedback mechanism and the exact discretization method. The proposed solution, different from its classical counterparts, takes the full state variables into account that realizes active damping control and harmonic elimination. Finally, simulation verifies that: (i) the exact discretization method improves control accuracy effectively; (ii) the full state-variables feedback FCS-MPC method shows good steady-state and dynamic performance than existed control methods.
AB - T-type three-level power converters have been widely used in distributed power generation systems (DPGSs), particularly for medium-voltage applications. In order to restrain grid-tied current harmonics, LCL filters are usually installed at the converter output side, due to their effectiveness to eliminate high-frequency harmonic. However, the LCL filter is a typical three-order system that includes a potential resonance frequency and may render the system into an unstable situation. To tackle this problem, we propose an improved Finite-Control-Set Model Predictive Control (FCS-MPC), using a full state-variable feedback mechanism and the exact discretization method. The proposed solution, different from its classical counterparts, takes the full state variables into account that realizes active damping control and harmonic elimination. Finally, simulation verifies that: (i) the exact discretization method improves control accuracy effectively; (ii) the full state-variables feedback FCS-MPC method shows good steady-state and dynamic performance than existed control methods.
KW - Exact discretization method
KW - Full state-variable feedback mechanism
KW - LCL-filters
KW - Predictive control
KW - T-type three-level converter
U2 - 10.1109/ECCE-Asia49820.2021.9479392
DO - 10.1109/ECCE-Asia49820.2021.9479392
M3 - Article in proceedings
SN - 9781728163444
T3 - Proceedings of the Energy Conversion Congress and Exposition - Asia, Ecce Asia 2021
SP - 1562
EP - 1566
BT - Proceedings of 12th IEEE Energy Conversion Congress and Exposition
PB - IEEE
T2 - 2021 IEEE 12<sup>th</sup> Energy Conversion Congress and Exposition – Asia
Y2 - 24 May 2021 through 27 May 2021
ER -