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A new fault detection method for modular multilevel converter semiconductor power switches

Haghnazari, S ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1109/IECON.2015.7392075
  3. Publisher: Institute of Electrical and Electronics Engineers Inc
  4. Abstract:
  5. This paper proposes a new fault detection method for the modular multilevel converter (MMC) semiconductor power switches. While in common MMCs, the modules capacitor voltages are measured directly for control purposes, in this paper voltage measurement point changes to module output terminal improving fault diagnosis ability. Based on this measurement reconfiguration, a novel fault detection algorithm is designed for MMCs semiconductor power switches. The open circuit and short circuit faultsare detected based on unconformity between modules output voltage and switching signals. Simulations results confirm accurate and fast operation of the proposed algorithm in faulty module diagnosis. Implementation simplicity, no need to extra voltage measurements and multi faults detection ability are some other advantages of the proposed method
  6. Keywords:
  7. Fault Diagnosis ; Fault Tolerant Operation ; Modular Multilevel Converter ; Semiconductor Power Switches
  8. Source: 41st Annual Conference of the IEEE Industrial Electronics Society, 9 November 2015 through 12 November 2015 ; 2015 , Pages 50-55 ; 9781479917624 (ISBN)
  9. URL: http://ieeexplore.ieee.org/document/7392075