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A Generalized Multilevel Inverter Based on T-Type Switched Capacitor Module with Reduced Devices

Author

Listed:
  • Yaoqiang Wang

    (School of Electrical Engineering, Zhengzhou University, Zhengzhou 450001, China)

  • Yisen Yuan

    (School of Electrical Engineering, Zhengzhou University, Zhengzhou 450001, China)

  • Gen Li

    (School of Engineering, Cardiff University, Cardiff CF24 3AA, UK)

  • Tianjin Chen

    (XJ Power Co., Ltd., Xuchang 461000, China)

  • Kewen Wang

    (School of Electrical Engineering, Zhengzhou University, Zhengzhou 450001, China)

  • Jun Liang

    (School of Electrical Engineering, Zhengzhou University, Zhengzhou 450001, China
    School of Engineering, Cardiff University, Cardiff CF24 3AA, UK)

Abstract

Conventional multilevel inverters have problems in terms of their complicated expansion and large number of devices. This paper proposes a modular expanded multilevel inverter, which can effectively simplify the expansion and reduce the number of devices. The proposed inverter can ensure the voltage balancing of the voltage-dividing capacitors. The cascading of the T-type switched capacitor module and the step-by-step charging method of the switched capacitors enable the inverter to achieve high output voltage levels and voltage gain. In addition, the inversion can be achieved without the H-bridge, which greatly reduces the total standing voltage of the switches. The nine-level inverter of the proposed topology can be realized with only ten switches, obtaining a voltage gain that is two times larger. The above merits were validated through theoretical analysis and experiments. The proposed inverter has good application prospects in medium- and low-voltage photovoltaic power generation.

Suggested Citation

  • Yaoqiang Wang & Yisen Yuan & Gen Li & Tianjin Chen & Kewen Wang & Jun Liang, 2020. "A Generalized Multilevel Inverter Based on T-Type Switched Capacitor Module with Reduced Devices," Energies, MDPI, vol. 13(17), pages 1-20, August.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:17:p:4406-:d:404473
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    Citations

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    Cited by:

    1. Mustafa F. Mohammed & Mohammed A. Qasim, 2022. "Single Phase T-Type Multilevel Inverters for Renewable Energy Systems, Topology, Modulation, and Control Techniques: A Review," Energies, MDPI, vol. 15(22), pages 1-24, November.
    2. Ali Abedaljabar Al-Samawi & Hafedh Trabelsi, 2022. "New Nine-Level Cascade Multilevel Inverter with a Minimum Number of Switches for PV Systems," Energies, MDPI, vol. 15(16), pages 1-25, August.

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