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Performance Assessment of Current Feedback-Based Active Damping Techniques for Three-Phase Grid-Connected VSCs with LCL Filters

Author

Listed:
  • Mustafa Ali

    (Department of Electrical and Computer Engineering, King Abdulaziz University, Jeddah 21589, Saudi Arabia)

  • Abdullah Ali Alhussainy

    (Center of Research Excellence in Renewable Energy and Power Systems, King Abdulaziz University, Jeddah 21589, Saudi Arabia
    Continuing Education Section, Energy and Water Academy (EWA), Rabigh 25754, Saudi Arabia)

  • Fahd Hariri

    (Department of Electrical and Computer Engineering, King Abdulaziz University, Jeddah 21589, Saudi Arabia
    Center of Research Excellence in Renewable Energy and Power Systems, King Abdulaziz University, Jeddah 21589, Saudi Arabia)

  • Sultan Alghamdi

    (Department of Electrical and Computer Engineering, King Abdulaziz University, Jeddah 21589, Saudi Arabia
    Center of Research Excellence in Renewable Energy and Power Systems, King Abdulaziz University, Jeddah 21589, Saudi Arabia)

  • Yusuf A. Alturki

    (Department of Electrical and Computer Engineering, King Abdulaziz University, Jeddah 21589, Saudi Arabia
    Center of Research Excellence in Renewable Energy and Power Systems, King Abdulaziz University, Jeddah 21589, Saudi Arabia)

Abstract

The voltage source converters convert the DC to AC in order to interface distributed generation units with the utility grid, typically using an LCL filter to smooth the modulated wave. However, the LCL filter can introduce resonance, potentially cause instability, and necessitate the use of damping techniques, such as active damping, which utilizes feedback from the current control loop to suppress resonance. This paper presents a comprehensive performance assessment of four current-feedback-based active damping (AD) techniques—converter current feedback (CCF), CCF with capacitor current feedback (CCFAD), grid current feedback (GCF), and GCF with capacitor current feedback (GCFAD)—under a broad range of realistic grid disturbances and low switching frequency conditions. Unlike prior works that often analyze individual feedback strategies in isolation, this study highlights and compares their dynamic behavior, robustness, and total harmonic distortion (THD) in eight operational scenarios. The results reveal the severe instability of GCF in the absence of damping and the superior inherent damping property of CCF while demonstrating the comparable effectiveness of GCFAD. Moreover, a simplified yet robust design methodology for the LCL filter is proposed, enabling the filter to maintain stability and performance even under significant variations in grid impedance. Additionally, a sensitivity analysis of switching frequency variation is included. The findings offer valuable insights into selecting and implementing robust active damping methods for grid-connected converters operating at constrained switching frequencies. The effectiveness of the proposed methods has been validated through both MATLAB/Simulink simulations and hardware-in-the-loop (HIL) testing.

Suggested Citation

  • Mustafa Ali & Abdullah Ali Alhussainy & Fahd Hariri & Sultan Alghamdi & Yusuf A. Alturki, 2025. "Performance Assessment of Current Feedback-Based Active Damping Techniques for Three-Phase Grid-Connected VSCs with LCL Filters," Mathematics, MDPI, vol. 13(16), pages 1-46, August.
    • Handle: RePEc:gam:jmathe:v:13:y:2025:i:16:p:2592-:d:1723673
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    References listed on IDEAS

    as
    1. Mahlooji, Mohammad Hossein & Mohammadi, Hamid Reza & Rahimi, Mohsen, 2018. "A review on modeling and control of grid-connected photovoltaic inverters with LCL filter," Renewable and Sustainable Energy Reviews, Elsevier, vol. 81(P1), pages 563-578.
    2. Marwa Ben Said-Romdhane & Mohamed Wissem Naouar & Ilhem Slama Belkhodja & Eric Monmasson, 2017. "An Improved LCL Filter Design in Order to Ensure Stability without Damping and Despite Large Grid Impedance Variations," Energies, MDPI, vol. 10(3), pages 1-19, March.
    3. Saïd-Romdhane, M. Ben & Naouar, M.W. & Belkhodja, I. Slama. & Monmasson, E., 2016. "Simple and systematic LCL filter design for three-phase grid-connected power converters," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 130(C), pages 181-193.
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