Adaptive output impedance correction strategy for enhancing STATCOM grid-connected system's adaptability to the weak grid condition

Qian Zhang; Jianze Wang; Jiakun Xie; Xu Liu

doi:10.1109/CEEGE66246.2025.11182553

Adaptive output impedance correction strategy for enhancing STATCOM grid-connected system's adaptability to the weak grid condition

Qian Zhang
, Jianze Wang^*
, Jiakun Xie
, Xu Liu

^*Corresponding author for this work

School of Electrical Engineering and Automation, Harbin Institute of Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

The dynamic interaction between the Static Synchronous Compensator (STATCOM) and the grid impedance may lead to harmonic distortion of the grid-connected current and even instability of the system under weak network conditions. In this paper, the output impedance characteristics and stability of STATCOM are analyzed first. In order to improve the adaptability of STATCOM to weak grid and ensure the stable operation of grid-connected system, an improved adaptive series and parallel integrated output impedance correction strategy based on grid impedance identification is proposed. This strategy can realize the adaptive adjustment of the virtual series impedance according to the expression of the fitting curve, so that STATCOM can operate stably when the impedance of the power grid changes (SCR=3-10), and improve the suppression ability of the background harmonics of the power grid voltage. Finally, the validity and correctness of the proposed strategy are verified by simulation.

Original language	English
Title of host publication	2025 8th International Conference on Electrical Engineering and Green Energy, CEEGE 2025
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	233-239
Number of pages	7
ISBN (Electronic)	9798331549350
DOIs	https://doi.org/10.1109/CEEGE66246.2025.11182553
State	Published - 2025
Externally published	Yes
Event	8th International Conference on Electrical Engineering and Green Energy, CEEGE 2025 - Yangzhou, China Duration: 4 Jul 2025 → 6 Jul 2025

Publication series

Name	2025 8th International Conference on Electrical Engineering and Green Energy, CEEGE 2025

Conference

Conference	8th International Conference on Electrical Engineering and Green Energy, CEEGE 2025
Country/Territory	China
City	Yangzhou
Period	4/07/25 → 6/07/25

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

STATCOM
adaptive adjustment
impedance correction
weak power grid

Access to Document

10.1109/CEEGE66246.2025.11182553

Cite this

Zhang, Q., Wang, J., Xie, J., & Liu, X. (2025). Adaptive output impedance correction strategy for enhancing STATCOM grid-connected system's adaptability to the weak grid condition. In 2025 8th International Conference on Electrical Engineering and Green Energy, CEEGE 2025 (pp. 233-239). (2025 8th International Conference on Electrical Engineering and Green Energy, CEEGE 2025). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CEEGE66246.2025.11182553

Zhang, Qian ; Wang, Jianze ; Xie, Jiakun et al. / Adaptive output impedance correction strategy for enhancing STATCOM grid-connected system's adaptability to the weak grid condition. 2025 8th International Conference on Electrical Engineering and Green Energy, CEEGE 2025. Institute of Electrical and Electronics Engineers Inc., 2025. pp. 233-239 (2025 8th International Conference on Electrical Engineering and Green Energy, CEEGE 2025).

@inproceedings{fab9274222af4737bca1196489edcbfb,

title = "Adaptive output impedance correction strategy for enhancing STATCOM grid-connected system's adaptability to the weak grid condition",

abstract = "The dynamic interaction between the Static Synchronous Compensator (STATCOM) and the grid impedance may lead to harmonic distortion of the grid-connected current and even instability of the system under weak network conditions. In this paper, the output impedance characteristics and stability of STATCOM are analyzed first. In order to improve the adaptability of STATCOM to weak grid and ensure the stable operation of grid-connected system, an improved adaptive series and parallel integrated output impedance correction strategy based on grid impedance identification is proposed. This strategy can realize the adaptive adjustment of the virtual series impedance according to the expression of the fitting curve, so that STATCOM can operate stably when the impedance of the power grid changes (SCR=3-10), and improve the suppression ability of the background harmonics of the power grid voltage. Finally, the validity and correctness of the proposed strategy are verified by simulation.",

keywords = "STATCOM, adaptive adjustment, impedance correction, weak power grid",

author = "Qian Zhang and Jianze Wang and Jiakun Xie and Xu Liu",

note = "Publisher Copyright: {\textcopyright} 2025 IEEE.; 8th International Conference on Electrical Engineering and Green Energy, CEEGE 2025 ; Conference date: 04-07-2025 Through 06-07-2025",

year = "2025",

doi = "10.1109/CEEGE66246.2025.11182553",

language = "英语",

series = "2025 8th International Conference on Electrical Engineering and Green Energy, CEEGE 2025",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

pages = "233--239",

booktitle = "2025 8th International Conference on Electrical Engineering and Green Energy, CEEGE 2025",

address = "美国",

}

Zhang, Q, Wang, J, Xie, J & Liu, X 2025, Adaptive output impedance correction strategy for enhancing STATCOM grid-connected system's adaptability to the weak grid condition. in 2025 8th International Conference on Electrical Engineering and Green Energy, CEEGE 2025. 2025 8th International Conference on Electrical Engineering and Green Energy, CEEGE 2025, Institute of Electrical and Electronics Engineers Inc., pp. 233-239, 8th International Conference on Electrical Engineering and Green Energy, CEEGE 2025, Yangzhou, China, 4/07/25. https://doi.org/10.1109/CEEGE66246.2025.11182553

Adaptive output impedance correction strategy for enhancing STATCOM grid-connected system's adaptability to the weak grid condition. / Zhang, Qian; Wang, Jianze; Xie, Jiakun et al.
2025 8th International Conference on Electrical Engineering and Green Energy, CEEGE 2025. Institute of Electrical and Electronics Engineers Inc., 2025. p. 233-239 (2025 8th International Conference on Electrical Engineering and Green Energy, CEEGE 2025).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Adaptive output impedance correction strategy for enhancing STATCOM grid-connected system's adaptability to the weak grid condition

AU - Zhang, Qian

AU - Wang, Jianze

AU - Xie, Jiakun

AU - Liu, Xu

PY - 2025

Y1 - 2025

N2 - The dynamic interaction between the Static Synchronous Compensator (STATCOM) and the grid impedance may lead to harmonic distortion of the grid-connected current and even instability of the system under weak network conditions. In this paper, the output impedance characteristics and stability of STATCOM are analyzed first. In order to improve the adaptability of STATCOM to weak grid and ensure the stable operation of grid-connected system, an improved adaptive series and parallel integrated output impedance correction strategy based on grid impedance identification is proposed. This strategy can realize the adaptive adjustment of the virtual series impedance according to the expression of the fitting curve, so that STATCOM can operate stably when the impedance of the power grid changes (SCR=3-10), and improve the suppression ability of the background harmonics of the power grid voltage. Finally, the validity and correctness of the proposed strategy are verified by simulation.

AB - The dynamic interaction between the Static Synchronous Compensator (STATCOM) and the grid impedance may lead to harmonic distortion of the grid-connected current and even instability of the system under weak network conditions. In this paper, the output impedance characteristics and stability of STATCOM are analyzed first. In order to improve the adaptability of STATCOM to weak grid and ensure the stable operation of grid-connected system, an improved adaptive series and parallel integrated output impedance correction strategy based on grid impedance identification is proposed. This strategy can realize the adaptive adjustment of the virtual series impedance according to the expression of the fitting curve, so that STATCOM can operate stably when the impedance of the power grid changes (SCR=3-10), and improve the suppression ability of the background harmonics of the power grid voltage. Finally, the validity and correctness of the proposed strategy are verified by simulation.

KW - STATCOM

KW - adaptive adjustment

KW - impedance correction

KW - weak power grid

UR - https://www.scopus.com/pages/publications/105019785680

U2 - 10.1109/CEEGE66246.2025.11182553

DO - 10.1109/CEEGE66246.2025.11182553

M3 - 会议稿件

AN - SCOPUS:105019785680

T3 - 2025 8th International Conference on Electrical Engineering and Green Energy, CEEGE 2025

SP - 233

EP - 239

BT - 2025 8th International Conference on Electrical Engineering and Green Energy, CEEGE 2025

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 8th International Conference on Electrical Engineering and Green Energy, CEEGE 2025

Y2 - 4 July 2025 through 6 July 2025

ER -

Zhang Q, Wang J, Xie J, Liu X. Adaptive output impedance correction strategy for enhancing STATCOM grid-connected system's adaptability to the weak grid condition. In 2025 8th International Conference on Electrical Engineering and Green Energy, CEEGE 2025. Institute of Electrical and Electronics Engineers Inc. 2025. p. 233-239. (2025 8th International Conference on Electrical Engineering and Green Energy, CEEGE 2025). doi: 10.1109/CEEGE66246.2025.11182553

Adaptive output impedance correction strategy for enhancing STATCOM grid-connected system's adaptability to the weak grid condition

Abstract

Publication series

Conference

UN SDGs

Keywords

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