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Stability Analysis and Active Damping Scheme for APF System Under Weak Grid Condition
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Xinglong LIU1, Yihan XIE2, Ziyang YANG1, Zhilong ZHANG2, Hao YI2, Fang ZHUO2
Electric Drive | 2024, 54(8) : 10 - 18
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Electric Drive | 2024, 54(8): 10-18
Stability Analysis and Active Damping Scheme for APF System Under Weak Grid Condition
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Xinglong LIU1, Yihan XIE2, Ziyang YANG1, Zhilong ZHANG2, Hao YI2, Fang ZHUO2
Affiliations
  • 1 Measurement Center，Yunnan Power Grid Co.，Ltd.，Kunming 650051，Yunnan，China
  • 2 School of Electrical Engineering，Xi’an Jiaotong University，Xi’an 710049，Shaanxi，China
Published: 2024-08-20 doi: 10.19457/j.1001-2095.dqcd25531
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Active power filters（APF）are widely used for dynamic compensation of power system harmonic. However，under weak grid conditions，the interaction between APF，nonlinear loads and grid impedance can easily lead to the stability issue of harmonic oscillation around the compensation frequency，resulting in the fault of harmonic compensation and further deterioration of the system's power quality. Through small-signal modelling of the loop，the harmonic oscillation mechanism in APF system under weak grid conditions was revealed，and an active damping scheme based on inductor current feedback was proposed to suppress harmonic oscillation according to the conclusion of stability analysis，which ensures the stable harmonic compensation capability of APF under weak grid conditions. The effectiveness of the proposed scheme was verified by PLECS time-domain simulations and hardware platform experiments.

active power filter （APF）  /  weak grid  /  small-signal modeling  /  stability analysis  /  active damping
Xinglong LIU, Yihan XIE, Ziyang YANG, Zhilong ZHANG, Hao YI, Fang ZHUO. Stability Analysis and Active Damping Scheme for APF System Under Weak Grid Condition[J]. Electric Drive, 2024 , 54 (8) : 10 -18 . DOI: 10.19457/j.1001-2095.dqcd25531
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Year 2024 volume 54 Issue 8
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Article Info
doi: 10.19457/j.1001-2095.dqcd25531
  • Receive Date：2023-11-30
  • Online Date：2025-12-09
  • Published：2024-08-20
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  • Received：2023-11-30
  • Revised：2024-02-19
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Affiliations
    1 Measurement Center，Yunnan Power Grid Co.，Ltd.，Kunming 650051，Yunnan，China
    2 School of Electrical Engineering，Xi’an Jiaotong University，Xi’an 710049，Shaanxi，China
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