IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v324y2025ics0360544225015245.html
   My bibliography  Save this article

Harmonic mitigation in grid-integrated renewable energy systems with nonlinear loads

Author

Listed:
  • Reguieg, Zakaria
  • Bouyakoub, Ismail
  • Mehedi, Fayçal

Abstract

This study addresses the power quality (PQ) challenges associated with integrating renewable energy sources (RES), particularly photovoltaic and wind systems, into the electrical grid with nonlinear loads (NLs). The study focuses on the implementation and performance of the Unified Power Quality Conditioner (UPQC), which comprises series and shunt Active Power Filters connected by a DC link, to mitigate these harmonic distortions. MATLAB Simulink were used to evaluate the UPQC's effectiveness under various scenarios, including normal operation, NL variations, unbalanced NL, and unbalanced NL variations. Fault analysis was performed under 20 % unbalanced voltage sag and swell. The final test involved highly NLs with a total harmonic distortion (THD) exceeding 55 %. The results demonstrate that THD current values range from 1.66 % to 2.23 %, decreasing from more than 55 % to under 5 % in all cases. Additionally, the UPQC mitigates harmonic voltages, reducing them from 9.80 % to 1.7 %, and achieves a reduction of 77.56 % in voltage harmonics and 72.22 % in current harmonics, compared to existing methods. The system also stabilizes the load voltage during fault scenarios. This study provides a comprehensive approach to harmonic mitigation, enhancing PQ and ensuring grid stability in systems integrating RES with NL.

Suggested Citation

  • Reguieg, Zakaria & Bouyakoub, Ismail & Mehedi, Fayçal, 2025. "Harmonic mitigation in grid-integrated renewable energy systems with nonlinear loads," Energy, Elsevier, vol. 324(C).
    • Handle: RePEc:eee:energy:v:324:y:2025:i:c:s0360544225015245
    DOI: 10.1016/j.energy.2025.135882
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0360544225015245
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.energy.2025.135882?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    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:eee:energy:v:324:y:2025:i:c:s0360544225015245. 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: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/energy .

    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.