TY - JOUR
T1 - A Novel RC-ESO-ADRC for Harmonics Suppression and Robustness Improvement of Grid-Tied Inverters in a Weak and Distorted Grid
AU - Zhao, Qiangsong
AU - Wang, Qifan
AU - Zhang, Hongwei
AU - Xia, Yuanqing
AU - Ye, Yongqiang
N1 - Publisher Copyright:
© 1986-2012 IEEE.
PY - 2025
Y1 - 2025
N2 - Repetitive control-based extended state observer (RC-ESO) enhances the estimation accuracy of periodic harmonic disturbances. However, it exhibits a slow convergence rate of disturbance estimation, limited steady-state estimation accuracy, and a lack of systematic design. An improved active disturbance rejection control (ADRC) current control scheme based on a novel RC-ESO (NRC-ESO) is proposed in this article. An ideal compensation filter is used to design the NRC-ESO, achieving a faster convergence rate for disturbance estimation. In addition, a zero-phase low-pass filter is embedded in the NRC-ESO to reduce the current steady-state error and mitigate the impact of sensors high-frequency noise. The antidisturbance ability, tracking performance, system stability, and detail parameter optimization design of the NRC-ESO-based ADRC (NRC-ESO-ADRC) are presented. The experimental results reflect the effectiveness of current harmonics suppression and robustness.
AB - Repetitive control-based extended state observer (RC-ESO) enhances the estimation accuracy of periodic harmonic disturbances. However, it exhibits a slow convergence rate of disturbance estimation, limited steady-state estimation accuracy, and a lack of systematic design. An improved active disturbance rejection control (ADRC) current control scheme based on a novel RC-ESO (NRC-ESO) is proposed in this article. An ideal compensation filter is used to design the NRC-ESO, achieving a faster convergence rate for disturbance estimation. In addition, a zero-phase low-pass filter is embedded in the NRC-ESO to reduce the current steady-state error and mitigate the impact of sensors high-frequency noise. The antidisturbance ability, tracking performance, system stability, and detail parameter optimization design of the NRC-ESO-based ADRC (NRC-ESO-ADRC) are presented. The experimental results reflect the effectiveness of current harmonics suppression and robustness.
KW - Active disturbance rejection control (ADRC)
KW - current harmonics
KW - extended state observer (ESO)
KW - grid-tied inverter
KW - repetitive control (RC)
UR - http://www.scopus.com/inward/record.url?scp=105003554828&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2025.3563178
DO - 10.1109/TPEL.2025.3563178
M3 - Article
AN - SCOPUS:105003554828
SN - 0885-8993
VL - 40
SP - 12581
EP - 12593
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
IS - 9
ER -