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Symmetry
Volume 17
Issue 12
10.3390/sym17122016
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

A Power Decoupling Strategy for Virtual Synchronous Generator Based on Active Disturbance Rejection Control Strategy

by
Yu Ji
1,
Hai Zhang
1,
Ming Wu
1,
Lijuan Hu
1,
Ran Chen
2,
Lijing Sun
1,* and
Yini Xu
1
1
Advanced Energy Technology Center, State Grid Shanghai Energy Interconnection Research Institute Co., Ltd., Shanghai 200031, China
2
Electric Power Research Institute, State Grid Shanghai Electric Power Co., Ltd., Shanghai 200437, China
*
Author to whom correspondence should be addressed.
Symmetry 2025, 17(12), 2016; https://doi.org/10.3390/sym17122016
Submission received: 4 August 2025 / Revised: 22 September 2025 / Accepted: 11 October 2025 / Published: 21 November 2025
(This article belongs to the Special Issue Symmetry in Digitalisation of Distribution Power System)
Versions Notes

Abstract

The renewable power grid is a complex system with multiple symmetries, in which active power and reactive power play different but symmetrical roles. In weak power grid condition, the virtual synchronous generators (VSGs) are prone to large power angles and high impedance ratios in the transmission lines, leading to severe coupling between active and reactive power. This coupling causes mutual interference between the active and reactive power outputs of the VSG, increasing the dynamic oscillations and prolonging the regulation time. To solve this problem, a power decoupling strategy for VSGs based on active disturbance rejection control (ADRC) is proposed in this paper. The ADRC control decouples the VSG, a dual-input, dual-output coupled system, into two single-input, single-output systems by observing and compensating for disturbances. This approach eliminates the coupling between the VSG’s power loops without considering virtual impedance. Compared with the conventional virtual impedance power decoupling method for VSGs, the proposed ADRC strategy can deal with multi-variable systems with different orders without complex and detailed high-order models, effectively decoupling the active power and reactive power of the VSG and improving the stability of the power grid.
Keywords: renewable power grid; virtual synchronous machine; power decoupling strategy; active disturbance rejection control renewable power grid; virtual synchronous machine; power decoupling strategy; active disturbance rejection control

Share and Cite

MDPI and ACS Style

Ji, Y.; Zhang, H.; Wu, M.; Hu, L.; Chen, R.; Sun, L.; Xu, Y. A Power Decoupling Strategy for Virtual Synchronous Generator Based on Active Disturbance Rejection Control Strategy. Symmetry 2025, 17, 2016. https://doi.org/10.3390/sym17122016

AMA Style

Ji Y, Zhang H, Wu M, Hu L, Chen R, Sun L, Xu Y. A Power Decoupling Strategy for Virtual Synchronous Generator Based on Active Disturbance Rejection Control Strategy. Symmetry. 2025; 17(12):2016. https://doi.org/10.3390/sym17122016

Chicago/Turabian Style

Ji, Yu, Hai Zhang, Ming Wu, Lijuan Hu, Ran Chen, Lijing Sun, and Yini Xu. 2025. "A Power Decoupling Strategy for Virtual Synchronous Generator Based on Active Disturbance Rejection Control Strategy" Symmetry 17, no. 12: 2016. https://doi.org/10.3390/sym17122016

APA Style

Ji, Y., Zhang, H., Wu, M., Hu, L., Chen, R., Sun, L., & Xu, Y. (2025). A Power Decoupling Strategy for Virtual Synchronous Generator Based on Active Disturbance Rejection Control Strategy. Symmetry, 17(12), 2016. https://doi.org/10.3390/sym17122016

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

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