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DC-link Ripple Reduction in a DPWM-Based Two-Level VSI

Author

Listed:
  • Anatolii Tcai

    (Chair of Power Electronics, Christian-Albrechts-Universität zu Kiel, 2, Kaiserstr, 24143 Kiel, Germany)

  • Ibrahim Mohd Alsofyani

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

  • In-Yong Seo

    (KEPCO Research Institute (KEPRI), 55, Jeollyeok-ro, Naju-si, Jeollanam-do 58322, 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 new method to reduce the ripple current of the DC-link capacitor in a two-level voltage source inverter (VSI), with a discontinuous pulse-width modulation (DPWM). In real applications, a capacitor block is very bulky, due to the parallel connection of several capacitors that share the value of the ripple current. Hence, it contributes significantly to the volume and weight of the whole system. Conventional DPWM is used to minimize the amount of switching for the power transistors, therefore, reducing stress and power loss. This leads to increased efficiency and reliability of the system. Nevertheless, the reduction of the DC link ripple current is still not optimal. Therefore, the proposed method introduces a PWM phase-shift technique to provide further reduction of the DC-link ripple current in a DPWM-based VSI. The efficacy of the proposed method is confirmed by simulation and experimental results.

Suggested Citation

  • Anatolii Tcai & Ibrahim Mohd Alsofyani & In-Yong Seo & Kyo-Beum Lee, 2018. "DC-link Ripple Reduction in a DPWM-Based Two-Level VSI," Energies, MDPI, vol. 11(11), pages 1-16, November.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:11:p:3008-:d:179981
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    Citations

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    Cited by:

    1. Xuefeng Jin & Jiahao Liu & Wei Chen & Tingna Shi, 2023. "Optimized Synchronous Pulse Width Modulation Strategy Based on Discontinuous Carriers," Energies, MDPI, vol. 16(5), pages 1-16, March.
    2. Ibrahim Mohd Alsofyani & Kyo-Beum Lee, 2019. "Improved Deadbeat FC-MPC Based on the Discrete Space Vector Modulation Method with Efficient Computation for a Grid-Connected Three-Level Inverter System," Energies, MDPI, vol. 12(16), pages 1-18, August.
    3. Silpa Baburajan & Haoran Wang & Dinesh Kumar & Qian Wang & Frede Blaabjerg, 2021. "DC-Link Current Harmonic Mitigation via Phase-Shifting of Carrier Waves in Paralleled Inverter Systems," Energies, MDPI, vol. 14(14), pages 1-17, July.

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