TY - JOUR
T1 - A Dual-Layer Back-Stepping Control Method for Lyapunov Stability in Modular Multilevel Converter Based STATCOM
AU - Jin, Yu
AU - Xiao, Qian
AU - Jia, Hongjie
AU - Mu, Yunfei
AU - Ji, Yanchao
AU - Teodorescu, Remus
AU - Dragičević, Tomislav
PY - 2022/3
Y1 - 2022/3
N2 - With the high penetration of the power electronic loads in the grid, the stability of static synchronous compensator (STATCOM) devices is greatly challenged. However, the conventional control methods for the modular multilevel converter (MMC) based STATCOM only consider the stability with small signal disturbances. This article proposes a novel dual-layer back-stepping control (BSC) for the MMC-based STATCOM. In the first layer, the BSC aims to regulate the sum of the capacitor energy and the reactive output current. In the second layer, the BSC aims to control the circulating current. Therefore, the proposed method possesses a fast dynamic response and accurate tracking with the Lyapunov stability of the MMC-based STATCOM. Compared with the arm-control-based BSC for MMC-based inverters, the proposed method has a simplified structure and a reduced computation burden. Moreover, the proposed method realizes the independent control between the output current and the circulating current. The simulation and experimental results verify the effectiveness of the proposed method. In addition, its robustness toward different circuit parameters and the operation ability under unbalanced grid fault is also verified.
AB - With the high penetration of the power electronic loads in the grid, the stability of static synchronous compensator (STATCOM) devices is greatly challenged. However, the conventional control methods for the modular multilevel converter (MMC) based STATCOM only consider the stability with small signal disturbances. This article proposes a novel dual-layer back-stepping control (BSC) for the MMC-based STATCOM. In the first layer, the BSC aims to regulate the sum of the capacitor energy and the reactive output current. In the second layer, the BSC aims to control the circulating current. Therefore, the proposed method possesses a fast dynamic response and accurate tracking with the Lyapunov stability of the MMC-based STATCOM. Compared with the arm-control-based BSC for MMC-based inverters, the proposed method has a simplified structure and a reduced computation burden. Moreover, the proposed method realizes the independent control between the output current and the circulating current. The simulation and experimental results verify the effectiveness of the proposed method. In addition, its robustness toward different circuit parameters and the operation ability under unbalanced grid fault is also verified.
KW - Automatic voltage control
KW - Capacitors
KW - Legged locomotion
KW - Multilevel converters
KW - Nonlinear dynamical systems
KW - Power system stability
KW - Topology
KW - modular multilevel converter (MMC)
KW - Back-stepping control (BSC)
KW - Lyapunov stability
KW - static synchronous compensator (STATCOM)
UR - http://www.scopus.com/inward/record.url?scp=85102657132&partnerID=8YFLogxK
U2 - 10.1109/TIE.2021.3063973
DO - 10.1109/TIE.2021.3063973
M3 - Journal article
SN - 1557-9948
VL - 69
SP - 2166
EP - 2179
JO - IEEE Transactions on Industrial Electronics
JF - IEEE Transactions on Industrial Electronics
IS - 3
M1 - 9374770
ER -