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Harmonic Analysis and Attenuation Strategy for a Two-Stage Matrix Converter Fed by Dual-Inverter Based on Pulse Barycenter Method

Author

Listed:
  • Qiang Geng

    (School of Electrical Engineering, Tiangong University, Tianjin 300387, China)

  • Jiahe Feng

    (School of Electrical Engineering, Tiangong University, Tianjin 300387, China)

  • Haojie Sha

    (School of Electrical Engineering, Tiangong University, Tianjin 300387, China)

  • Weixi Zhou

    (School of Electrical Engineering, Tiangong University, Tianjin 300387, China)

  • Zhanqing Zhou

    (School of Electrical Engineering, Tiangong University, Tianjin 300387, China)

Abstract

Since the DC-link of the dual-inverter two-stage matrix converter (TSMC) has no energy storage element, its grid-side current waveform is closely related to the load-side condition. The conventional modulation strategy of the dual-inverter TSMC is only the stack of the double inverters, without considering the cooperation between both modulation strategies. Thus, the fluctuations in the grid-side currents synthesized by both load-side currents will be obvious. To solve this problem, this paper analyzes the effect of the current pulse position on the grid-side current waveform quality, and relevant relationship between the pulse position and current harmonics is obtained according to Fourier transform. On this basis, the harmonic attenuation strategy for the dual-inverter TSMC is proposed. In the proposed strategy, the grid-side current harmonic is reduced based on the optimal duty-cycle combination, obtained from the harmonic optimization problem. The simulation and experimental results are provided to verify that the theoretical analysis of grid-side current harmonic content is consistent with the actual condition, and the proposed modulation strategy can effectively reduce the grid-side current harmonic.

Suggested Citation

  • Qiang Geng & Jiahe Feng & Haojie Sha & Weixi Zhou & Zhanqing Zhou, 2022. "Harmonic Analysis and Attenuation Strategy for a Two-Stage Matrix Converter Fed by Dual-Inverter Based on Pulse Barycenter Method," Energies, MDPI, vol. 15(12), pages 1-20, June.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:12:p:4447-:d:842073
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    References listed on IDEAS

    as
    1. Tingna Shi & Lingling Wu & Yan Yan & Changliang Xia, 2018. "Harmonic Spectrum of Output Voltage for Space Vector Pulse Width Modulated Ultra Sparse Matrix Converter," Energies, MDPI, vol. 11(2), pages 1-13, February.
    2. Jiaxing Lei & Chaofan Wei & Shuang Feng, 2019. "Input Disturbance Suppression for Unidirectional Matrix Converter with a Stability-Enhancing Modulation Scheme," Energies, MDPI, vol. 12(13), pages 1-13, July.
    3. Yeongsu Bak & Eunsil Lee & Kyo-Beum Lee, 2015. "Indirect Matrix Converter for Hybrid Electric Vehicle Application with Three-Phase and Single-Phase Outputs," Energies, MDPI, vol. 8(5), pages 1-18, April.
    4. Hoang-Long Dang & Eun-Su Jun & Sangshin Kwak, 2019. "Reduction of DC Current Ripples by Virtual Space Vector Modulation for Three-Phase AC–DC Matrix Converters," Energies, MDPI, vol. 12(22), pages 1-15, November.
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