IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v13y2020i15p3888-d391856.html
   My bibliography  Save this article

A Sliding-Mode-Based Duty Ratio Controller for Multiple Parallelly-Connected DC–DC Converters with Constant Power Loads on MVDC Shipboard Power Systems

Author

Listed:
  • Wenzeng Du

    (Department of Automation, Shanghai Jiao Tong University, Shanghai 200240, China
    Ningbo Artificial Intelligence Institute, Shanghai Jiao Tong University, Ningbo 315000, China)

  • Genke Yang

    (Department of Automation, Shanghai Jiao Tong University, Shanghai 200240, China
    Ningbo Artificial Intelligence Institute, Shanghai Jiao Tong University, Ningbo 315000, China)

  • Changchun Pan

    (Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)

  • Peifeng Xi

    (Shanghai Key Laboratory of Smart Grid Demand Response, Shanghai 200063, China)

  • Yue Chen

    (Department of Automation, Shanghai Jiao Tong University, Shanghai 200240, China)

Abstract

The development of powered electronic technology has made many aware of the design and control of ship power systems (SPSs), and has made medium voltage DC (MVDC) architecture the main research direction in the future. The negative impedance characteristic of constant power load (CPL) generated by the coupling of powered electronic converters will seriously affect the stability of the systems if these converters are not properly controlled. The conventional linear control method can only guarantee the small-signal stability of the system near its equilibrium point. When the operating point changes in a large range, linear control methods will be ineffective. More importantly, research for the large-signal stability of the multi-converter system with CPLs is still rarely involved. In this paper, a sliding-mode-based duty ratio controller (SMDC) is proposed for voltage regulation and current sharing of the multiple parallelly-connected DC–DC converters system loaded by CPLs. By controlling the output voltage of each converter with SMDC, large-signal stability of the coupled bus voltage is ensured. Meanwhile, proportional current sharing between the parallel converters is achieved by droop control integrated in the reference value of converter voltage. Simulation studies were conducted in MATLAB/Simulink, where two typical operating conditions, including the variation of load power and bus voltage, were designed to verify the effectiveness of the proposed method. Moreover, a traditional PID controller was used as a comparison to reflect the superiority of the former. Simulation results showed that the proposed method is able to guarantee large-signal stability of the system in the presence of large-scale variations in load power and bus voltage. The output current of the parallel converters can also be distributed in desired proportions according to the droop coefficient.

Suggested Citation

  • Wenzeng Du & Genke Yang & Changchun Pan & Peifeng Xi & Yue Chen, 2020. "A Sliding-Mode-Based Duty Ratio Controller for Multiple Parallelly-Connected DC–DC Converters with Constant Power Loads on MVDC Shipboard Power Systems," Energies, MDPI, vol. 13(15), pages 1-18, July.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:15:p:3888-:d:391856
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/13/15/3888/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/13/15/3888/
    Download Restriction: no
    ---><---

    Citations

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


    Cited by:

    1. Chengshun Yang & Shuangfei Ni & Yuchen Dai & Xiaoning Huang & Dongdong Zhang, 2020. "Anti-Disturbance Finite-Time Adaptive Sliding Mode Backstepping Control for PV Inverter in Master–Slave-Organized Islanded Microgrid," Energies, MDPI, vol. 13(17), pages 1-19, August.

    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:13:y:2020:i:15:p:3888-:d:391856. 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.