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Weak Grid Stabilization Control of Grid-connected Inverter Based on Adaptive Voltage Feedforward
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Lin ZHANG1, Longxiang YOU2, Meiyi SONG1, Miao CAO1, Wei YAN1, Xin ZHANG  Member, CPSS2
Journal of Power Supply | 2025, 23(4) : 137 - 150
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Journal of Power Supply | 2025, 23(4): 137-150
• Renewable Energy System •
Weak Grid Stabilization Control of Grid-connected Inverter Based on Adaptive Voltage Feedforward
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Lin ZHANG1, Longxiang YOU2, Meiyi SONG1, Miao CAO1, Wei YAN1, Xin ZHANG  Member, CPSS2
Affiliations
  • 1.Economic and Technological Research Institute, State Grid Shaanxi Electric Power Co., Ltd., Xi’an 710075, China
  • 2.College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Published: 2025-07-30 doi: 10.13234/j.issn.2095-2805.2025.4.137
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With the continuous increase in new energy penetration, the impedance interaction between a grid-connected inverter (GCI) and a weak grid is easy to induce small-signal oscillation instability. To solve this problem, the limitations of the existing voltage feedforward impedance reshaping strategy are analyzed in this paper at first. Then, an adaptive voltage feedforward impedance reshaping strategy is proposed. This strategy utilizes simulated anneal-particle swarm optimization algorithm to optimize the feedforward path parameters off-line under sample conditions of different values of output power and grid impedance, and polynomial fitting is used to cover the continuous full operating range. By deploying the fitting relationship in the inverter, the feedforward path parameters can be adjusted adaptively according to real-time power and grid impedance. The proposed adaptive strategy can ensure a better stability margin of GCI under conditions of different values of output power and grid impedance, and the dynamic performance of the system is considered to some degree. Finally, experiments were carried out on an OPAL-RT semi-physical experimental platform to verify the effectiveness of the proposed strategy.

Grid-connected inverter (GCI)  /  weak grid  /  stability  /  impedance reshaping  /  adaptive control strategy
张琳, 游龙翔, 宋美艺, 曹苗, 严薇, 张欣中国电源学会会员. 基于自适应电压前馈的并网逆变器弱网致稳控制. 电源学报, 2025 , 23 (4) : 137 -150 . DOI: 10.13234/j.issn.2095-2805.2025.4.137
Lin ZHANG, Longxiang YOU, Meiyi SONG, Miao CAO, Wei YAN, Xin ZHANG. Weak Grid Stabilization Control of Grid-connected Inverter Based on Adaptive Voltage Feedforward[J]. Journal of Power Supply, 2025 , 23 (4) : 137 -150 . DOI: 10.13234/j.issn.2095-2805.2025.4.137
Appendix
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Year 2025 volume 23 Issue 4
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Article Info
doi: 10.13234/j.issn.2095-2805.2025.4.137
  • Receive Date：2024-07-10
  • Online Date：2026-10-26
  • Published：2025-07-30
Article Data
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History
  • Received：2024-07-10
  • Revised：2024-08-21
  • Accepted：2024-08-23
Affiliations
    1.Economic and Technological Research Institute, State Grid Shaanxi Electric Power Co., Ltd., Xi’an 710075, China
    2.College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
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