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This paper presents a fault tolerant control (FTC) strategy for a three-phase four-leg shunt active power filter (4-LSAPF) based on isolated bipolar transistors (IGBTs). The strategy deals with open-circuit faults in one of the IGBT switches by adding a fifth leg to the system and using an advanced fault detection and localisation algorithm. The algorithm automatically replaces the faulty leg with the spare leg, ensuring the continued performance and reliability of the converter. Simulation results using MATLAB software showed that the system remains highly efficient and continues to operate efficiently even during faults, enhancing reliability and ensuring uninterrupted performance.

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Improving Power Quality with a Diagnosis and Fault Tolerant Four-Leg Shunt Active Power Filter

  • 会议论文

  • 发表日期：

    2026年

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  • Djerboub Ahmed,
  • Tamer Amina,
  • Allaoui Tayeb

摘要

This paper presents a fault tolerant control (FTC) strategy for a three-phase four-leg shunt active power filter (4-LSAPF) based on isolated bipolar transistors (IGBTs). The strategy deals with open-circuit faults in one of the IGBT switches by adding a fifth leg to the system and using an advanced fault detection and localisation algorithm. The algorithm automatically replaces the faulty leg with the spare leg, ensuring the continued performance and reliability of the converter. Simulation results using MATLAB software showed that the system remains highly efficient and continues to operate efficiently even during faults, enhancing reliability and ensuring uninterrupted performance.