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Balanced Current Control Strategy for Current Source Rectifier Stage of Indirect Matrix Converter under Unbalanced Grid Voltage Conditions

Author

Listed:
  • Yeongsu Bak

    (Department of Electrical and Computer Engineering, Ajou University, 206, World cup-ro, Yeongtong-gu, Suwon 16499, Korea)

  • June-Seok Lee

    (Railroad Safety Research Division, Korea Railroad Research Institute, 176, Cheoldo Bangmulgwan-ro, Uiwang-si, Gyeonggi-do 16105, Korea)

  • Kyo-Beum Lee

    (Department of Electrical and Computer Engineering, Ajou University, 206, World cup-ro, Yeongtong-gu, Suwon 16499, Korea)

Abstract

This paper proposes a balanced current control strategy for the current source rectifier (CSR) stage of an indirect matrix converter (IMC) under unbalanced grid voltage conditions. If the three-phase grid connected to the voltage source inverter (VSI) of the IMC has unbalanced voltage conditions, it affects the currents of the CSR stage and VSI stage, and the currents are distorted. Above all, the distorted currents of the CSR stage cause instability in the overall system, which can affect the life span of the system. Therefore, in this paper, a control strategy for balanced currents in the CSR stage is proposed. To achieve balanced currents in the CSR stage, the VSI stage should receive DC power without ripple components from the CSR stage. This is implemented by controlling the currents in the VSI stage. Therefore, the proposed control strategy decouples the positive and negative phase-sequence components existing in the unbalanced voltages and currents of the VSI stage. Using the proposed control strategy under unbalanced grid voltage conditions, the stability and life span of the overall system can be improved. The effectiveness of the proposed control strategy is verified by simulation and experimental results.

Suggested Citation

  • Yeongsu Bak & June-Seok Lee & Kyo-Beum Lee, 2016. "Balanced Current Control Strategy for Current Source Rectifier Stage of Indirect Matrix Converter under Unbalanced Grid Voltage Conditions," Energies, MDPI, vol. 10(1), pages 1-18, December.
    • Handle: RePEc:gam:jeners:v:10:y:2016:i:1:p:27-:d:86252
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    References listed on IDEAS

    as
    1. Sho Shibata & Hiroaki Yamada & Toshihiko Tanaka & Masayuki Okamoto, 2016. "Reduced-Capacity Inrush Current Suppressor Using a Matrix Converter in a Wind Power Generation System with Squirrel-Cage Induction Machines," Energies, MDPI, vol. 9(3), pages 1-17, March.
    2. Shin Young Heo & Mun Kyeom Kim & Jin Woo Choi, 2015. "Hybrid Intelligent Control Method to Improve the Frequency Support Capability of Wind Energy Conversion Systems," Energies, MDPI, vol. 8(10), pages 1-22, October.
    3. Yingning Qiu & Wenxiu Zhang & Mengnan Cao & Yanhui Feng & David Infield, 2015. "An Electro-Thermal Analysis of a Variable-Speed Doubly-Fed Induction Generator in a Wind Turbine," Energies, MDPI, vol. 8(5), pages 1-17, April.
    4. Hae Gwang Jeong & Ro Hak Seung & Kyo Beum Lee, 2012. "An Improved Maximum Power Point Tracking Method for Wind Power Systems," Energies, MDPI, vol. 5(5), pages 1-16, May.
    5. 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.
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