Version 1
: Received: 23 April 2024 / Approved: 23 April 2024 / Online: 24 April 2024 (02:59:16 CEST)
How to cite:
Huang, M.; Li, H. Disturbance Rejection Control of Grid-Forming Inverter for Line Impedance Parameter Perturbation in Weak Power Grid. Preprints2024, 2024041516. https://doi.org/10.20944/preprints202404.1516.v1
Huang, M.; Li, H. Disturbance Rejection Control of Grid-Forming Inverter for Line Impedance Parameter Perturbation in Weak Power Grid. Preprints 2024, 2024041516. https://doi.org/10.20944/preprints202404.1516.v1
Huang, M.; Li, H. Disturbance Rejection Control of Grid-Forming Inverter for Line Impedance Parameter Perturbation in Weak Power Grid. Preprints2024, 2024041516. https://doi.org/10.20944/preprints202404.1516.v1
APA Style
Huang, M., & Li, H. (2024). Disturbance Rejection Control of Grid-Forming Inverter for Line Impedance Parameter Perturbation in Weak Power Grid. Preprints. https://doi.org/10.20944/preprints202404.1516.v1
Chicago/Turabian Style
Huang, M. and Hui Li. 2024 "Disturbance Rejection Control of Grid-Forming Inverter for Line Impedance Parameter Perturbation in Weak Power Grid" Preprints. https://doi.org/10.20944/preprints202404.1516.v1
Abstract
When a grid-forming (GFM) inverter is connected to a low or medium voltage weak power grid, the line impedance with resistive-inductive characteristics will cause power coupling. Typical GFM decoupling control strategies are designed under nominal line impedance parameters. However, there are deviations between the nominal line impedance and actual parameters, resulting in poor decoupling effects. Aiming at this problem, this paper proposes a power decoupling strategy based on a reduced-order extended state observer (ESO). Firstly, the power dynamic model of GFM is established based on the dynamic phasor method. Then, the model deviation and power coupling due to line impedance parameter perturbation are estimated as internal disturbances of the system, and the disturbances are compensated on the basis of typical power control strategy and virtual impedance decoupling. Good decoupling performance is obtained under different impedance parameters, improving the control strategy's robustness. Finally, the effectiveness of the proposed method is verified by the results of RT Box hardware-in-the-loop experiments.
Keywords
grid-forming inverter; power decoupling; reduced-order extended state observer; dynamic phasor method; virtual impedance; line impedance parameter perturbation
Subject
Engineering, Electrical and Electronic Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
