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Voltage Stability Control Strategy for Photovoltaic-storage Converters Based on NDO Power Feedforward
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Lianbing LI  Member, CPSS1, Xinda LI1, Liangliang DAI1, Zeyu CHEN1, Qingxiang SONG2
Journal of Power Supply | 2026, 24(5) : 109 - 119
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Journal of Power Supply | 2026, 24(5): 109-119
• Renewable Energy Generation and Energy Storage •
Voltage Stability Control Strategy for Photovoltaic-storage Converters Based on NDO Power Feedforward
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Lianbing LI  Member, CPSS1, Xinda LI1, Liangliang DAI1, Zeyu CHEN1, Qingxiang SONG2
Affiliations
  • 1.School of Electrical Engineering, Hebei University of Technology, Tianjin 300130, China
  • 2.Huichuan Technology Dongguan Co., Ltd., Dongguan 523800, China
Published: 2026-05-30 doi: 10.13234/j.issn.2095-2805.2026.5.109
Outline
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In off-grid photovoltaic storage microgrids, the DC-side bus voltage amplitude is easily affected by the fluctuation of photovoltaic (PV) output power and load power, the system may experience DC bus voltage oscillation and long voltage recovery time under the traditional control strategies. In order to improve the dynamic stability of bus voltage, a fuzzy-proportional integral (PI) control method based on nonlinear disturbance observer (NDO) power feedforward is proposed. Firstly, the system state equation in storage discharge mode is established, and the disturbance observation link is designed to observe the disturbance power of the PV and load in real time and add it to the current inner loop as a feedforward quantity after correction. Then, a fuzzy-PI controller based on bus voltage deviation is designed to improve the structure of voltage outer loop, and the design process of disturbance observer and controller is given. Finally, the simulation and experimental results verify that the strategy can have good dynamic stability of DC bus voltage under load impact.

Photovoltaic-storage microgrid  /  DC bus voltage  /  nonlinear disturbance observer (NDO)  /  voltage dynamic stability  /  fuzzy-proportional integral (PI) control
李练兵中国电源学会会员, 李新达, 代亮亮, 陈泽宇, 宋清翔. 基于NDO功率前馈的光储变换器电压稳定控制策略. 电源学报, 2026 , 24 (5) : 109 -119 . DOI: 10.13234/j.issn.2095-2805.2026.5.109
Lianbing LI, Xinda LI, Liangliang DAI, Zeyu CHEN, Qingxiang SONG. Voltage Stability Control Strategy for Photovoltaic-storage Converters Based on NDO Power Feedforward[J]. Journal of Power Supply, 2026 , 24 (5) : 109 -119 . DOI: 10.13234/j.issn.2095-2805.2026.5.109
Funding
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  • S&T Program of Hebei(20312102D)
Appendix
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Year 2026 volume 24 Issue 5
58
13
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Article Info
doi: 10.13234/j.issn.2095-2805.2026.5.109
  • Receive Date：2024-04-12
  • Online Date：2026-10-29
  • Published：2026-05-30
Article Data
Affiliations
History
  • Received：2024-04-12
  • Revised：2024-05-22
  • Accepted：2024-05-29
Funding
S&T Program of Hebei(20312102D)
Affiliations
    1.School of Electrical Engineering, Hebei University of Technology, Tianjin 300130, China
    2.Huichuan Technology Dongguan Co., Ltd., Dongguan 523800, China
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