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A Hybrid Nine-Arm High-Voltage Inverter with DC-Fault Blocking Capability

Author

Listed:
  • Luyun Jiao

    (School of Electric Power, South China University of Technology, Guangzhou 510640, China)

  • Dongyuan Qiu

    (School of Electric Power, South China University of Technology, Guangzhou 510640, China)

  • Bo Zhang

    (School of Electric Power, South China University of Technology, Guangzhou 510640, China)

  • Yanfeng Chen

    (School of Electric Power, South China University of Technology, Guangzhou 510640, China)

Abstract

The nine-arm inverter integrates two modular multilevel converters (MMCs) into one compact inverter to diminish the number of power semiconductor devices. It can be used for dual-motor driving or connecting two AC power sources in a multi-terminal high voltage direct current (HVDC) system, etc. Although the half-bridge based modular multilevel converter has the fewest components, it is generally not resistant to the DC-side faults. In order to achieve a DC fault blocking capability with high efficiency and low cost, this paper proposes a hybrid nine-arm high-voltage inverter, which is consists of a full-bridge sub-module (FBSM) and a half-bridge sub-module (HBSM). Firstly, the topology, operation modes, and modulation strategy of the proposed hybrid inverter are presented. Then, by analyzing the potential short-circuit current paths between different ports, the ability of the proposed hybrid inverter to block the DC faults is described and the appropriate ratio of HBSM and FBSM is determined to further reduce the number of devices and the losses of the proposed hybrid inverter. Finally, simulation results based on MATLAB/Simulink are provided to demonstrate the effectiveness and feasibility of the proposed hybrid nine-arm high-voltage inverter under normal operation and DC fault condition.

Suggested Citation

  • Luyun Jiao & Dongyuan Qiu & Bo Zhang & Yanfeng Chen, 2019. "A Hybrid Nine-Arm High-Voltage Inverter with DC-Fault Blocking Capability," Energies, MDPI, vol. 12(20), pages 1-15, October.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:20:p:3850-:d:275465
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    References listed on IDEAS

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    1. Xin-Jian Cai & Zhen-Xing Wu & Quan-Feng Li & Shu-Xiu Wang, 2015. "Phase-Shifted Carrier Pulse Width Modulation Based on Particle Swarm Optimization for Cascaded H-bridge Multilevel Inverters with Unequal DC Voltages," Energies, MDPI, vol. 8(9), pages 1-18, September.
    2. Zhe Wang & Hua Lin & Yajun Ma, 2019. "A Control Strategy of Modular Multilevel Converter with Integrated Battery Energy Storage System Based on Battery Side Capacitor Voltage Control," Energies, MDPI, vol. 12(11), pages 1-21, June.
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    Cited by:

    1. Adyr A. Estévez-Bén & Alfredo Alvarez-Diazcomas & Juvenal Rodríguez-Reséndiz, 2020. "Transformerless Multilevel Voltage-Source Inverter Topology Comparative Study for PV Systems," Energies, MDPI, vol. 13(12), pages 1-26, June.

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