Authors : B Phani Ranga Raja; K Jaya Prakash; B Durga Prasad; T Dundi

Volume/Issue : Volume 10 - 2025, Issue 4 - April

Google Scholar : https://tinyurl.com/mvjdh6j7

Scribd : https://tinyurl.com/5bajdjj8

DOI : https://doi.org/10.38124/ijisrt/25apr618

Google Scholar

Note : A published paper may take 4-5 working days from the publication date to appear in PlumX Metrics, Semantic Scholar, and ResearchGate.

Note : Google Scholar may take 15 to 20 days to display the article.

Abstract : This project presents the design and implementation of a Buck-Boost Transformer-less Inverter (BBTI) for grid-connected solar photovoltaic systems. Building upon existing research, this study introduces a novel control strategy utilizing a Proportional-Integral (PI) controller to enhance the inverter's performance. The PI controller effectively regulates output voltage and current, improving system stability and minimizing steady-state errors. Implemented in Python, this project leverages extensive libraries for numerical computation and visualization, enabling real-time monitoring and adjustments. The simulation results demonstrate significant improvements in the dynamic response of the inverter, allowing it to adapt quickly to varying load conditions and optimize power delivery to the grid. The enhanced control mechanism leads to a reduction in Total Harmonic Distortion (THD) and improved efficiency, validating the effectiveness of the proposed modifications. Overall, this project contributes to advancing the reliability and performance of transformer-less inverter technology in renewable energy applications.

Keywords : Buck-Boost Converter; Python Simulation; Leakage Currents, PI Controller.

References :

1. R. Praveena, D. Venkataramana, and T. R. Mahesh, “A New Buck–Boost Topology for Grid-Connected PV System with Power Decoupling,” IEEE Transactions on Industrial Electronics, vol. 69, no. 3, pp. 2808–2818, March 2022. DOI: 10.1109/TIE.2021.3072704
2. IEEE Standard 519-2014, "IEEE Recommended Practice and Requirements for Harmonic Control in Electric Power Systems," Institute of Electrical and Electronics Engineers, 2014.
3. S. B. Kjaer, J. K. Pedersen, and F. Blaabjerg, “A review of single-phase grid-connected inverters for photovoltaic modules,” IEEE Transactions on Industry Applications, vol. 41, no. 5, pp. 1292–1306, Sept.–Oct. 2005
4. NPTEL Online Certification, “Power Electronics,” Prof. B.G. Fernandes, IIT Bombay. https://nptel.ac.in/courses/108/101/108101038/
5. R. W. Erickson and D. Maksimović, Fundamentals of Power Electronics, 2nd Edition, Springer Science & Business Media, 2001.
6. Python Control Systems Library Documentation – https://python-control.readthedocs.io
7. NumPy Documentation - https://numpy.org/doc/
8. SciPy Documentation https://docs.scipy.org/doc/scipy/
9. Matplotlib Documentation https://matplotlib.org/stable/contents.html
10. S. Kouro, M. Malinowski, K. Gopakumar, J. Pou, L. G. Franquelo, et al., “Recent Advances and Industrial Applications of Multilevel Converters,” IEEE Transactions on Industrial Electronics, vol. 57, no. 8, pp. 2553–2580, Aug. 2010.