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Voltage-Balancing Strategy for Three-Level Neutral-Point-Clamped Cascade Converter under Sequence Smooth Modulation

Author

Listed:
  • Le Yu

    (School of Electrical Engineering, Jiaotong University Chengdu, Chengdu 611756, China)

  • Xu Peng

    (Aviation Engineering Institute Civil, Aviation Flight University, Guanghan 618307, China)

  • Chao Zhou

    (Aviation Engineering Institute Civil, Aviation Flight University, Guanghan 618307, China)

  • Shibin Gao

    (School of Electrical Engineering, Jiaotong University Chengdu, Chengdu 611756, China)

Abstract

Three-level neutral-point clamped cascaded converters (3LNPC-CC) are widely used in high power nigh-voltage applications. This paper mainly discusses the open-circuit fault in DC-side of the 3LNPC-CC. Optimized by the sequence pulse modulation, a sequence smooth modulation (SSM) is proposed to keep the DC-side voltage balance while the 3LNPC-CC suffers open-circuit fault from DC-side. The SSM found efficient switch-state path through a 3-D cube model and simplified the path from thousands of switch state. The SSM avoids the complex calculation in the voltage-balancing modulation, while the dynamic character of it was less influenced. At the same time, the modulation changes the voltage level smoothly and balances the fault DC-side voltage effectively. The characters of the proposed modulation are verified by the simulation and the experiment.

Suggested Citation

  • Le Yu & Xu Peng & Chao Zhou & Shibin Gao, 2020. "Voltage-Balancing Strategy for Three-Level Neutral-Point-Clamped Cascade Converter under Sequence Smooth Modulation," Energies, MDPI, vol. 13(18), pages 1-18, September.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:18:p:4969-:d:417389
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    References listed on IDEAS

    as
    1. Xiaoqiong He & Xiaolan Lin & Xu Peng & Pengcheng Han & Zeliang Shu & Shibin Gao, 2017. "Control Strategy of Single-Phase Three Level Neutral Point Clamped Cascaded Rectifier," Energies, MDPI, vol. 10(5), pages 1-16, April.
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    Cited by:

    1. Lucian Mihet-Popa & Sergio Saponara, 2021. "Power Converters, Electric Drives and Energy Storage Systems for Electrified Transportation and Smart Grid Applications," Energies, MDPI, vol. 14(14), pages 1-5, July.

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