Scholarlink

This paper investigates the single-line-to-ground (SLG) faults that can occur on the valve side of modular multilevel converter (MMC) stations used for integrating offshore wind farms. The grounding faults at the onshore converter installations result in significant threats that could compromise the stable performance of the power system. Furthermore, the paper also explores how SLG faults influence the DC link voltage and impact the wind farm operation. To address this issue, a control strategy using zero-sequence voltage modulation is used to reduce overvoltage in the DC voltage from such faults. Finally, MATLAB/Simulink simulations are carried out to verify the mathematical model of valve-side SLG faults and validate the effectiveness of the proposed control strategy.

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Fault Ride-Through Strategy for MMC-HVDC System Under Single Line-to-Ground Fault

  • 会议论文

  • 发表日期：

    2025年

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  • Hicham Korzane,
  • Abdeldjabar Benrabah,
  • Farid Khoucha,
  • Khelifa Benmansour

摘要

This paper investigates the single-line-to-ground (SLG) faults that can occur on the valve side of modular multilevel converter (MMC) stations used for integrating offshore wind farms. The grounding faults at the onshore converter installations result in significant threats that could compromise the stable performance of the power system. Furthermore, the paper also explores how SLG faults influence the DC link voltage and impact the wind farm operation. To address this issue, a control strategy using zero-sequence voltage modulation is used to reduce overvoltage in the DC voltage from such faults. Finally, MATLAB/Simulink simulations are carried out to verify the mathematical model of valve-side SLG faults and validate the effectiveness of the proposed control strategy.