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Variable-gain Approach Backstepping Sliding-mode Control of DC Microgrid Bidirectional Converter Based on NDO
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Jingwen CHEN1, Yuan WANG  Student Member, CPSS1, Fuqiang WANG2, Tongxin WANG2
Journal of Power Supply | 2026, 24(4) : 59 - 68
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Journal of Power Supply | 2026, 24(4): 59-68
• Power Converter Modeling and Control •
Variable-gain Approach Backstepping Sliding-mode Control of DC Microgrid Bidirectional Converter Based on NDO
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Jingwen CHEN1, Yuan WANG  Student Member, CPSS1, Fuqiang WANG2, Tongxin WANG2
Affiliations
  • 1.School of Electrical and Control Engineering, Shaanxi University of Science & Technology, Xi’an 710021, China
  • 2.Luxshare Precision Technology (Xi’an) Co., Ltd., Xi’an 710021, China
Published: 2026-04-30 doi: 10.13234/j.issn.2095-2805.2026.4.59
Outline
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Aimed at the issue of bus voltage instability caused by constant-power load in a DC microgrid, a variable-gain approach backstepping sliding-mode control strategy based on a nonlinear disturbance observer (NDO) is proposed. First, the exact feedback linearization method is used to obtain the standard Brunovsky linear model of a bidirectional DC-DC converter. Second, a backstepping sliding-mode controller is designed to enhance the robustness of the system while reducing its adjustment time. The error variables are linearly combined to form a sliding-mode surface, and the sliding-mode approach law of power-exponential variable-gain is constructed to achieve fast and accurate tracking of the reference voltage. On this basis, the NDO is introduced to estimate the system perturbation in realtime, and the estimation results are compensated to the backstepping sliding-mode controller to further reduce the steady-state voltage deviation of the system. Finally, MATLAB simulations and an RT-LAB HIL platform demonstrate that the proposed control strategy can enhance the steady-state performance of the system and is highly robust with respect to system and parameter perturbations.

DC microgrid  /  constant-power load  /  backstepping sliding-mode control  /  variable-gain approach  /  nonlinear disturbance observer (NDO)
陈景文, 王媛中国电源学会学生会员, 王福强, 王同新. 基于NDO的直流微网双向变换器变增益趋近反步滑模控制. 电源学报, 2026 , 24 (4) : 59 -68 . DOI: 10.13234/j.issn.2095-2805.2026.4.59
Jingwen CHEN, Yuan WANG, Fuqiang WANG, Tongxin WANG. Variable-gain Approach Backstepping Sliding-mode Control of DC Microgrid Bidirectional Converter Based on NDO[J]. Journal of Power Supply, 2026 , 24 (4) : 59 -68 . DOI: 10.13234/j.issn.2095-2805.2026.4.59
Funding
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  • Shaanxi Key Research and Development Program(2023-YBGY-304)
Appendix
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Year 2026 volume 24 Issue 4
38
5
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Article Info
doi: 10.13234/j.issn.2095-2805.2026.4.59
  • Receive Date：2024-01-28
  • Online Date：2026-10-29
  • Published：2026-04-30
Article Data
Affiliations
History
  • Received：2024-01-28
  • Revised：2024-03-04
  • Accepted：2024-03-27
Funding
Shaanxi Key Research and Development Program(2023-YBGY-304)
Affiliations
    1.School of Electrical and Control Engineering, Shaanxi University of Science & Technology, Xi’an 710021, China
    2.Luxshare Precision Technology (Xi’an) Co., Ltd., Xi’an 710021, China
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