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A Method for the Simultaneous Suppression of DC Capacitor Fluctuations and Common-Mode Voltage in a Five-Level NPC/H Bridge Inverter

Author

Listed:
  • Ming Wu

    (China Electric Power Research Institute, Haidian District, Beijing 100192, China)

  • Zhenhao Song

    (China Electric Power Research Institute, Haidian District, Beijing 100192, China)

  • Zhipeng Lv

    (China Electric Power Research Institute, Haidian District, Beijing 100192, China)

  • Kai Zhou

    (Jiangsu Province Laboratory of Mining Electric and Automation, China University of Mining and Technology, Xuzhou 221008, China)

  • Qi Cui

    (Jiangsu Province Laboratory of Mining Electric and Automation, China University of Mining and Technology, Xuzhou 221008, China)

Abstract

To suppress the direct current (DC) capacitor voltage fluctuations and the common-mode voltage (CMV) in a three-phase, five-level, neutral-point-clamped (NPC)/H-bridge inverter, this paper analyzes the influence of all voltage vectors on the neutral point potential of each phase under different pulse mappings in detail with an explanation of the CMV distribution. Then, based on the traditional space vector pulse width modulation (SVPWM) algorithm, a dual-pulse-mapping algorithm is proposed to suppress the DC capacitor fluctuations and the CMV simultaneously. In the algorithm, the reference voltage synthesis selects the voltage vector that has the smallest CMV value as the priority. In addition, the two kinds of pulse mappings that have opposite effects on the neutral point potential are switched to output. At the same time, regulating factors are introduced to adjust the working time of each voltage vector under the two pulse mappings; then, the capacitor voltages can be balanced. Both the simulation and experiment demonstrate the algorithm’s effectiveness.

Suggested Citation

  • Ming Wu & Zhenhao Song & Zhipeng Lv & Kai Zhou & Qi Cui, 2019. "A Method for the Simultaneous Suppression of DC Capacitor Fluctuations and Common-Mode Voltage in a Five-Level NPC/H Bridge Inverter," Energies, MDPI, vol. 12(5), pages 1-14, February.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:5:p:779-:d:209181
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    Cited by:

    1. Serhii Stepenko & Oleksandr Husev & Dmitri Vinnikov & Carlos Roncero-Clemente & Sergio Pires Pimentel & Elena Santasheva, 2019. "Experimental Comparison of Two-Level Full-SiC and Three-Level Si–SiC Quasi-Z-Source Inverters for PV Applications," Energies, MDPI, vol. 12(13), pages 1-17, June.
    2. Marek Michalczuk & Marcin Nikoniuk & Paweł Radziszewski, 2021. "Multi-Inverter Linear Motor Based Vehicle Propulsion System for a Small Cargo Transportation," Energies, MDPI, vol. 14(15), pages 1-16, July.
    3. Fengjie Sun & Chenkai Zhao, 2019. "Research and Modeling of Photovoltaic Array Channel Noise Characteristics," Energies, MDPI, vol. 12(7), pages 1-20, April.
    4. Maosong Zhang & Ying Cui & Qunjing Wang & Jun Tao & Xiuqin Wang & Hongsheng Zhao & Guoli Li, 2019. "A Study on Neutral-Point Potential in Three-Level NPC Converters," Energies, MDPI, vol. 12(17), pages 1-22, September.

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