Optimized Placement of PV and VAR-Capable Capacitors for Voltage Unbalance Mitigation in Low-Voltage Distribution Systems

  • Unique Paper ID: 188946
  • Volume: 12
  • Issue: 7
  • PageNo: 4770-4775
  • Abstract:
  • This paper presents an optimized approach for voltage unbalance mitigation in a low-voltage distribution system using the coordinated placement of Photovoltaic (PV) units and VAR-capable capacitors. A 30-bus distribution network is modeled and analyzed using MI Power software. Load flow studies are performed under 150% loading conditions using the Newton-Raphson and Fast Decoupled Load Flow (FDLF) methods to identify voltage deviations and weak buses. Voltage stability analysis is carried out using the Fast Voltage Stability Index (FVSI), and buses 26, 29, and 30 are identified as critical nodes. Optimization of reactive power injection through PV inverters and capacitors is performed to improve voltage profiles and balance the system. The results demonstrate significant improvement in voltage stability and reduction in unbalance, proving the effectiveness of the proposed approach.

Copyright & License

Copyright © 2026 Authors retain the copyright of this article. This article is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

BibTeX

@article{188946,
        author = {Mr.Kubera U and Disha S Gowda and Keerthana M and Byregowda H R and Tharun G},
        title = {Optimized Placement of PV and VAR-Capable Capacitors for Voltage Unbalance Mitigation in Low-Voltage Distribution Systems},
        journal = {International Journal of Innovative Research in Technology},
        year = {2025},
        volume = {12},
        number = {7},
        pages = {4770-4775},
        issn = {2349-6002},
        url = {https://ijirt.org/article?manuscript=188946},
        abstract = {This paper presents an optimized approach for voltage unbalance mitigation in a low-voltage distribution system using the coordinated placement of Photovoltaic (PV) units and VAR-capable capacitors. A 30-bus distribution network is modeled and analyzed using MI Power software. Load flow studies are performed under 150% loading conditions using the Newton-Raphson and Fast Decoupled Load Flow (FDLF) methods to identify voltage deviations and weak buses. Voltage stability analysis is carried out using the Fast Voltage Stability Index (FVSI), and buses 26, 29, and 30 are identified as critical nodes. Optimization of reactive power injection through PV inverters and capacitors is performed to improve voltage profiles and balance the system. The results demonstrate significant improvement in voltage stability and reduction in unbalance, proving the effectiveness of the proposed approach.},
        keywords = {Voltage unbalance, PV systems, VAR compensation, Load flow analysis, FVSI, Newton-Raphson, Fast decoupled method, Low-voltage distribution.},
        month = {December},
        }

Cite This Article

U, M., & Gowda, D. S., & M, K., & R, B. H., & G, T. (2025). Optimized Placement of PV and VAR-Capable Capacitors for Voltage Unbalance Mitigation in Low-Voltage Distribution Systems. International Journal of Innovative Research in Technology (IJIRT), 12(7), 4770–4775.

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