TY - JOUR
T1 - Modulated Model Predictive Control for Multilevel Cascaded H-Bridge Converter-Based Static Synchronous Compensator
AU - Xiao, Qian
AU - Jin, Yu
AU - Jia, Hongjie
AU - Mu, Yunfei
AU - Ji, Yanchao
AU - Teodorescu, Remus
AU - Blaabjerg, Frede
PY - 2022
Y1 - 2022
N2 - The model predictive control (MPC) methods show certain limits when applied to the multilevel converters, such as unfixed switching frequency, large computation burden, and complex weighting factors selection. This paper proposes a novel modulated model predictive control (M2PC) method for cascaded H-bridge (CHB) converter based static synchronous compensator (STATCOM). Instead of multi-targets integration and weighting factors design, the proposed method disintegrates the voltage balancing control process from the cost function. The evaluated control sets for output current control is decided by the search step and the search range in each period. By properly design and selection of the adaptive search step for the output voltage references under α-β coordinate, the search range can be reduced, which greatly reduces the number of evaluated control sets in each control period. Therefore, the dynamic of output characteristics and the low prediction computation burden of the MPC method are guaranteed simultaneously. In addition, with the simple and independent integration of the capacitor voltage balancing control, the proposed method can be easily applied in the CHB converter based STATCOM application. Furthermore, this paper provides a delay compensation for the prediction process. Simulation and experimental results verify the effectiveness of the proposed method.
AB - The model predictive control (MPC) methods show certain limits when applied to the multilevel converters, such as unfixed switching frequency, large computation burden, and complex weighting factors selection. This paper proposes a novel modulated model predictive control (M2PC) method for cascaded H-bridge (CHB) converter based static synchronous compensator (STATCOM). Instead of multi-targets integration and weighting factors design, the proposed method disintegrates the voltage balancing control process from the cost function. The evaluated control sets for output current control is decided by the search step and the search range in each period. By properly design and selection of the adaptive search step for the output voltage references under α-β coordinate, the search range can be reduced, which greatly reduces the number of evaluated control sets in each control period. Therefore, the dynamic of output characteristics and the low prediction computation burden of the MPC method are guaranteed simultaneously. In addition, with the simple and independent integration of the capacitor voltage balancing control, the proposed method can be easily applied in the CHB converter based STATCOM application. Furthermore, this paper provides a delay compensation for the prediction process. Simulation and experimental results verify the effectiveness of the proposed method.
KW - Cascaded H-bridge (CHB)
KW - model predictive control (MPC)
KW - multilevel converter
KW - static synchronous compensator (STATCOM)
KW - switching frequency
KW - Capacitors
KW - cascaded H-bridge (CHB)
KW - Switches
KW - Control systems
KW - Switching frequency
KW - Automatic voltage control
KW - Mathematical model
KW - Predictive control
UR - http://www.scopus.com/inward/record.url?scp=85101462232&partnerID=8YFLogxK
U2 - 10.1109/TIE.2021.3056953
DO - 10.1109/TIE.2021.3056953
M3 - Journal article
SN - 1557-9948
VL - 69
SP - 1091
EP - 1102
JO - IEEE Transactions on Industrial Electronics
JF - IEEE Transactions on Industrial Electronics
IS - 2
M1 - 9351757
ER -