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Quantitative Analysis of Balancing Range for Single-Phase 3L-NPC Converters

Author

Listed:
  • Ziying Wang

    (College of Electrical Engineering, Sichuan University, Chengdu 610065, China)

  • Ning Jiao

    (College of Electrical Engineering, Sichuan University, Chengdu 610065, China)

  • Shunliang Wang

    (College of Electrical Engineering, Sichuan University, Chengdu 610065, China)

  • Junpeng Ma

    (College of Electrical Engineering, Sichuan University, Chengdu 610065, China)

  • Rui Zhang

    (College of Electrical Engineering, Sichuan University, Chengdu 610065, China)

  • Tianqi Liu

    (College of Electrical Engineering, Sichuan University, Chengdu 610065, China)

Abstract

Multiple techniques have been suggested to achieve control balance in single-phase three-level neutral-point clamped (3L-NPC) converters. Nevertheless, there is a deficiency of quantitative calculations related to the extent of balancing. Operating beyond the balancing range may result in a sequence of safety incidents. This paper presents a conceptualization of the 3L-NPC converter as two cascaded H-bridges. By employing power conservation principles, the balancing range for the NPC converter is derived, and two novel methods are investigated to broaden the balance range in accordance with the calculated balance range. A comparison is made among the balancing ranges under different balancing control methods. This study establishes a theoretical foundation to ensure the secure and stable operation of the NPC converter.

Suggested Citation

  • Ziying Wang & Ning Jiao & Shunliang Wang & Junpeng Ma & Rui Zhang & Tianqi Liu, 2024. "Quantitative Analysis of Balancing Range for Single-Phase 3L-NPC Converters," Energies, MDPI, vol. 17(6), pages 1-17, March.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:6:p:1464-:d:1359327
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