IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v11y2018i6p1331-d148608.html
   My bibliography  Save this article

Research on the Neutral-Point Voltage Balance for NPC Three-Level Inverters under Non-Ideal Grid Conditions

Author

Listed:
  • Jian Guo Lyu

    (Nanjing University of Science and Technology, Nanjing 210094, China
    Jiangsu Collaborative Innovation Center for Smart Distribution Network, Nanjing 211167, China)

  • Ji Dong Wang

    (Nanjing University of Science and Technology, Nanjing 210094, China)

  • Wen Bin Hu

    (Nanjing University of Science and Technology, Nanjing 210094, China)

  • Zhao Feng Wu

    (Nanjing University of Science and Technology, Nanjing 210094, China)

Abstract

In order to solve the neutral-point voltage unbalancing problem for neutral-point clamped (NPC) three-level inverters under non-ideal grid conditions, a novel zero-sequence component injection method for modulation signals was proposed in this paper. Based on the mathematical expressions of neutral-point voltage unbalancing, the fluctuation of the neutral-point voltage under different grid conditions was studied. The proposed method dynamically calculates the zero-sequence component for modulation signals by region selections based on sinusoidal pulse width modulation (DCR-SPWM). Under non-ideal grid conditions, this DCR-SPWM method can control the neutral-point voltage balance for NPC three-level inverters with different grid and output power conditions, and improves the grid current quality. The simulation results verified the correctness of the theoretical analysis in this paper, and the feasibility and effectiveness of this method were verified by the experiments in the experimental platform of the NPC three-level grid-connected inverter based on DSP-CPLD controllers.

Suggested Citation

  • Jian Guo Lyu & Ji Dong Wang & Wen Bin Hu & Zhao Feng Wu, 2018. "Research on the Neutral-Point Voltage Balance for NPC Three-Level Inverters under Non-Ideal Grid Conditions," Energies, MDPI, vol. 11(6), pages 1-21, May.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:6:p:1331-:d:148608
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/11/6/1331/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/11/6/1331/
    Download Restriction: no
    ---><---

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Ventosa-Cutillas, Antonio & Montero-Robina, Pablo & Cuesta, Federico & Gordillo, Francisco, 2020. "A simple modulation approach for interfacing three-level Neutral-Point-Clamped converters to the grid," Energy, Elsevier, vol. 205(C).
    2. Jan Iwaszkiewicz & Piotr Mysiak, 2019. "Supply System for Three-Level Inverters Using Multi-Pulse Rectifiers with Coupled Reactors," Energies, MDPI, vol. 12(17), pages 1-23, September.
    3. P. Madasamy & V. Suresh Kumar & P. Sanjeevikumar & Jens Bo Holm-Nielsen & Eklas Hosain & C. Bharatiraja, 2019. "A Three-Phase Transformerless T-Type- NPC-MLI for Grid Connected PV Systems with Common-Mode Leakage Current Mitigation," Energies, MDPI, vol. 12(12), pages 1-25, June.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jeners:v:11:y:2018:i:6:p:1331-:d:148608. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.