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Robust Backstepping Control Strategy for Grid-connected Inverter Based on Weighted Average Current
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Zichun ZHOU1, 2, Guofeng HE  Member, CPSS1, 2, Shuang LUO1, 2, Guojiao LI1, 2
Journal of Power Supply | 2025, 23(6) : 142 - 151
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Journal of Power Supply | 2025, 23(6): 142-151
• DC-AC Inverters •
Robust Backstepping Control Strategy for Grid-connected Inverter Based on Weighted Average Current
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Zichun ZHOU1, 2, Guofeng HE  Member, CPSS1, 2, Shuang LUO1, 2, Guojiao LI1, 2
Affiliations
  • 1.School of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, China
  • 2.School of Electrical and Control Engineering, Henan University of Urban Construction, Pingdingshan 467036, China
Published: 2025-10-30 doi: 10.13234/j.issn.2095-2805.2025.6.142
Outline
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To solve the problems of computational complexity and exponential amplification of measurement noise under the traditional backstepping control strategy applied to an LCL grid-connected inverter, an improved backstepping control strategy based on weighted average current control (WACC) is proposed in this paper. First, the order of the LCL filtering system is reduced from third-order to first-order by means of the WACC strategy, which effectively alleviates the overall computation load and decreases the number of derivations required for virtual control quantities. Then, a sliding-mode observer is utilized to observe the weighted average current, so as to lessen the influence of LCL filter parameter perturbation on the accuracy of weighted average current. Finally, a backstepping controller is designed to regulate the grid-connected current based on the established equivalent system model. Simulation and experimental results prove that the proposed control strategy has a good steady-state performance and high robustness.

Grid-connected inverter  /  weighted average current  /  backstepping control  /  sliding-mode observer
周子淳, 何国锋中国电源学会会员, 罗霜, 李国娇. 基于加权平均电流的并网逆变器鲁棒反步控制策略. 电源学报, 2025 , 23 (6) : 142 -151 . DOI: 10.13234/j.issn.2095-2805.2025.6.142
Zichun ZHOU, Guofeng HE, Shuang LUO, Guojiao LI. Robust Backstepping Control Strategy for Grid-connected Inverter Based on Weighted Average Current[J]. Journal of Power Supply, 2025 , 23 (6) : 142 -151 . DOI: 10.13234/j.issn.2095-2805.2025.6.142
Funding
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  • Natural Science Fund Project of Henan Province(222300420400)
Appendix
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Year 2025 volume 23 Issue 6
64
6
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Article Info
doi: 10.13234/j.issn.2095-2805.2025.6.142
  • Receive Date：2023-03-03
  • Online Date：2026-10-26
  • Published：2025-10-30
Article Data
Affiliations
History
  • Received：2023-03-03
  • Revised：2023-05-10
  • Accepted：2023-07-17
Funding
Natural Science Fund Project of Henan Province(222300420400)
Affiliations
    1.School of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, China
    2.School of Electrical and Control Engineering, Henan University of Urban Construction, Pingdingshan 467036, China
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