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This paper presents a practical comparison of damping strategies for LCL filters in grid-connected bidirectional onboard chargers (OBCs) used in electric vehicles (EVs). The study targets both Grid-to-Vehicle (G2V) and Vehicle-to-Grid (V2G) operation modes, where LCL filter resonance can compromise system stability. Three damping approaches are evaluated: series and parallel passive resistive methods, and active damping via capacitor-current feedback. A high-level comparison is conducted using MATLAB/Simulink simulations to assess resonance suppression and grid current quality. Results indicate that active damping offers the most consistent performance across bidirectional modes, while passive methods show mode-dependent limitations. The findings provide early-stage guidance for selecting damping strategies in LCL-based charger architectures.

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Comparative Evaluation of LCL Filter Damping Strategies in Bidirectional EV Onboard Chargers

  • 会议论文

  • 发表日期：

    2026年

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  • Anas Diouri,
  • Mohamed Khafallah,
  • Abdelilah Hassoune,
  • Mohammed Amine Meskini

摘要

This paper presents a practical comparison of damping strategies for LCL filters in grid-connected bidirectional onboard chargers (OBCs) used in electric vehicles (EVs). The study targets both Grid-to-Vehicle (G2V) and Vehicle-to-Grid (V2G) operation modes, where LCL filter resonance can compromise system stability. Three damping approaches are evaluated: series and parallel passive resistive methods, and active damping via capacitor-current feedback. A high-level comparison is conducted using MATLAB/Simulink simulations to assess resonance suppression and grid current quality. Results indicate that active damping offers the most consistent performance across bidirectional modes, while passive methods show mode-dependent limitations. The findings provide early-stage guidance for selecting damping strategies in LCL-based charger architectures.