TY - GEN
T1 - Design of Robust Feedback Control Together with Anti-Windup Compensator in Natural Frame for Three-Phase Grid-Tied Inverters with LCL Filter
AU - Debouza, Mahdi
AU - Errouissi, Rachid
AU - Shareef, Hussain
AU - Al Razehi, Mohammed
N1 - Funding Information:
The research is funded by United Arab Emirates University through fund codes 31N417-Start-U.P
Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - The design and experimental validation of a robust feedback controller for three-phase grid-tied inverters using LCL filter are presented in this paper. The proposed controller is developed in the natural reference frame to deal with normal and abnormal grid voltage conditions. The objective of the proposed controller is to achieve the goals of stabilization, accurate tracking of sinusoidal references, and asymptotic disturbance rejection. These goals are fulfilled by considering an existing dynamic/stabilizing compensator, which was proposed for a class of perturbed linear systems with sinusoidal disturbances. This compensator guarantees accurate sinusoidal reference tracking under fixed-frequency sinusoidal disturbances. However, during the saturation of control input, the transient response can be deteriorated due to the resonant build-up and can even destroy the closed-loop stability. To overcome this issue, the dynamic compensator is modified, in this paper, to incorporate an anti-windup scheme, where the gain is determined using absolute stability tools including the circle criterion. The proposed controller demonstrated a strong ability to ensure exact tracking of the sinusoidal current reference and reject sinusoidal disturbances with a good transient response even when the momentarily controller saturates.
AB - The design and experimental validation of a robust feedback controller for three-phase grid-tied inverters using LCL filter are presented in this paper. The proposed controller is developed in the natural reference frame to deal with normal and abnormal grid voltage conditions. The objective of the proposed controller is to achieve the goals of stabilization, accurate tracking of sinusoidal references, and asymptotic disturbance rejection. These goals are fulfilled by considering an existing dynamic/stabilizing compensator, which was proposed for a class of perturbed linear systems with sinusoidal disturbances. This compensator guarantees accurate sinusoidal reference tracking under fixed-frequency sinusoidal disturbances. However, during the saturation of control input, the transient response can be deteriorated due to the resonant build-up and can even destroy the closed-loop stability. To overcome this issue, the dynamic compensator is modified, in this paper, to incorporate an anti-windup scheme, where the gain is determined using absolute stability tools including the circle criterion. The proposed controller demonstrated a strong ability to ensure exact tracking of the sinusoidal current reference and reject sinusoidal disturbances with a good transient response even when the momentarily controller saturates.
KW - Anti-windup compensator
KW - circle criterion
KW - feedback control
KW - region of attraction
KW - sinusoidal disturbance rejection
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U2 - 10.1109/ICECTA57148.2022.9990370
DO - 10.1109/ICECTA57148.2022.9990370
M3 - Conference contribution
AN - SCOPUS:85146369340
T3 - 2022 International Conference on Electrical and Computing Technologies and Applications, ICECTA 2022
SP - 93
EP - 98
BT - 2022 International Conference on Electrical and Computing Technologies and Applications, ICECTA 2022
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2022 International Conference on Electrical and Computing Technologies and Applications, ICECTA 2022
Y2 - 23 November 2022 through 25 November 2022
ER -