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A Real-Time Fault-Tolerant Control Approach to Ensure the Resiliency of a Self-Healing Multilevel Converter

Author

Listed:
  • Sajjad Ahmadi

    (Faculté des Sciences et Technologies, Campus Aiguillettes, Université de Lorraine, GREEN, F-54500 Nancy, France)

  • Philippe Poure

    (Institut Jean Lamour (UMR7198), Université de Lorraine, CNRS, IJL, F-54500 Nancy, France)

  • Davood Arab Khaburi

    (The Center of Excellence for Power Systems Automation and Operation, Department of Electrical Engineering, Iran University of Science and Technology, Tehran 1311416846, Iran)

  • Shahrokh Saadate

    (Faculté des Sciences et Technologies, Campus Aiguillettes, Université de Lorraine, GREEN, F-54500 Nancy, France)

Abstract

Ensuring service continuity in safety critical applications is crucial. In some of these applications, multilevel converters play a vital role. In this regard, this research work presents a self-healing fault-tolerant control approach to ensure the resiliency of a neutral-point clamped converter when a semiconductor component encounters an open circuit fault. The defective semiconductor can be a power switch or a clamping diode. By applying the proposed real-time fault-tolerance control, the rated output voltage and output current are restored during post-fault operation. Furthermore, the total harmonic distortion value of the output voltage during application of the real time self-healing control does not increase when compared with that during healthy operation. Since the realization of the proposed control strategy does not require any bidirectional switch, a fast transition between the healthy and fault-tolerant operation is accomplished. Moreover, the proposed structure can ensure service continuity in case of a fault event in the anti-parallel diodes, something which has been overlooked in previously conducted research works.

Suggested Citation

  • Sajjad Ahmadi & Philippe Poure & Davood Arab Khaburi & Shahrokh Saadate, 2022. "A Real-Time Fault-Tolerant Control Approach to Ensure the Resiliency of a Self-Healing Multilevel Converter," Energies, MDPI, vol. 15(13), pages 1-16, June.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:13:p:4721-:d:849523
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    References listed on IDEAS

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    1. Mohammad Fahad & Mohd Tariq & Adil Sarwar & Mohammad Modabbir & Mohd Aman Zaid & Kuntal Satpathi & MD Reyaz Hussan & Mohammad Tayyab & Basem Alamri & Ahmad Alahmadi, 2021. "Asymmetric Multilevel Inverter Topology and Its Fault Management Strategy for High-Reliability Applications," Energies, MDPI, vol. 14(14), pages 1-21, July.
    2. Kuei-Hsiang Chao & Chen-Hou Ke, 2020. "Fault Diagnosis and Tolerant Control of Three-Level Neutral-Point Clamped Inverters in Motor Drives," Energies, MDPI, vol. 13(23), pages 1-25, November.
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