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Design and Control of Small DC-Link Capacitor-Based Three-Level Inverter with Neutral-Point Voltage Balancing

Author

Listed:
  • Hyo-Chul In

    (Green Energy Research and Development Center, EGTRONICS Company, Innoplex B/D 502, 304 Sinwon-ro, Yeongtong-gu, Suwon 16675, Korea)

  • Seok-Min Kim

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

  • Kyo-Beum Lee

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

Abstract

This paper presents a method to improve the quality of input-output currents in a three-level neutral-point clamped (NPC) inverter with small direct current-link (DC-link) capacitor systems. The inverter systems with the small DC-link capacitors have several advantages in terms of cost, volume, life-time, and reliability when compared to inverters that use large DC-link capacitors. However, there are problems with respect to the deterioration of the input current quality and a severe ripple of neutral-point voltage (NPV), which can cause an aggravated output current. To mitigate these issues, an additional circuit is applied for the input current shaping and a compensation algorithm is applied to reduce the ripple voltage of NPV. The effectiveness of the proposed design and control method is verified with various simulation and experimental results.

Suggested Citation

  • Hyo-Chul In & Seok-Min Kim & Kyo-Beum Lee, 2018. "Design and Control of Small DC-Link Capacitor-Based Three-Level Inverter with Neutral-Point Voltage Balancing," Energies, MDPI, vol. 11(6), pages 1-18, June.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:6:p:1435-:d:150447
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    Citations

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    Cited by:

    1. Van-Quang-Binh Ngo & Minh-Khai Nguyen & Tan-Tai Tran & Young-Cheol Lim & Joon-Ho Choi, 2018. "A Simplified Model Predictive Control for T-Type Inverter with Output LC Filter," Energies, MDPI, vol. 12(1), pages 1-18, December.
    2. Guozheng Zhang & Bingxu Wei & Xin Gu & Xinmin Li & Zhanqing Zhou & Wei Chen, 2019. "Sector Subdivision Based SVPWM Strategy of Neutral-Point-Clamped Three-Level Inverter for Current Ripple Reduction," Energies, MDPI, vol. 12(14), pages 1-16, July.
    3. 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.
    4. Antonio Ventosa-Cutillas & Pablo Montero-Robina & Francisco Umbría & Federico Cuesta & Francisco Gordillo, 2019. "Integrated Control and Modulation for Three-Level NPC Rectifiers," Energies, MDPI, vol. 12(9), pages 1-15, April.

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