IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v13y2020i10p2606-d360885.html
   My bibliography  Save this article

Ground Fault Detection Using Hybrid Method in IT System LVDC Microgrid

Author

Listed:
  • Kyung-Min Lee

    (Department of Electrical Engineering, Gangneung-Wonju National University, 150 Namwon Ro, Gangwon, Wonju 26403, Korea)

  • Chul-Won Park

    (Department of Electrical Engineering, Gangneung-Wonju National University, 150 Namwon Ro, Gangwon, Wonju 26403, Korea)

Abstract

Low voltage direct current (LVDC) microgrid systems have many advantages over low voltage alternating current (LVAC) systems. Furthermore, LVDC microgrids are growing in use because they are easy to link to distributed energy resources (DER) and energy storage systems (ESS), etc. Currently, IT system LVDC microgrids are widely used in direct current (DC) railways, hospitals, photovoltaic (PV) systems, and so on. When a ground fault occurs in an IT system LVDC microgrid, the ground fault may not be detected because the fault current is very small and there is no current path. In this paper, ground fault detection is proposed using a hybrid method that comprises pulsation signal generator injection and detailed coefficients of discrete wavelet transform (DWT). The LVDC microgrid was modeled and simulated using power systems computer-aided design (PSCAD). In addition, the proposed hybrid method was implemented using MATLAB’s wave menu, a script m-file, and the PSCAD library. The proper threshold was selected and tested by fault resistance change and load variation. In order to verify the superiority of the proposed hybrid method, a comparative study with the conventional method was performed. The results of various simulations show that the proposed hybrid detection method has normal operation and accurately and rapidly detects ground faults.

Suggested Citation

  • Kyung-Min Lee & Chul-Won Park, 2020. "Ground Fault Detection Using Hybrid Method in IT System LVDC Microgrid," Energies, MDPI, vol. 13(10), pages 1-12, May.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:10:p:2606-:d:360885
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/13/10/2606/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/13/10/2606/
    Download Restriction: no
    ---><---

    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:10:p:2606-:d:360885. 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.