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A High Step-Up Partial Power Processing DC/DC T-Source Converter for UPS Application

Author

Listed:
  • Amirhossein Rajaei

    (Electrical and Electronics Engineering Department, Shiraz University of Technology, Shiraz 71557-13876, Iran)

  • Mahdi Shahparasti

    (Department of Mechanical and Electrical Engineering, Electrical Engineering Section, University of Southern Denmark, 5230 Odense, Denmark)

  • Ali Nabinejad

    (Electrical and Electronics Engineering Department, Shiraz University of Technology, Shiraz 71557-13876, Iran)

  • Mehdi Savaghebi

    (Department of Mechanical and Electrical Engineering, Electrical Engineering Section, University of Southern Denmark, 5230 Odense, Denmark)

Abstract

In this paper, a new modified structure of a DC/DC T-source converter is proposed. Since the proposed converter provides high voltage gain, it is suitable for photovoltaic integration into uninterruptible power supply (UPS) systems. The proposed structure employs partial power processing technique to increase the output voltage as well as efficiency without requiring new hardware. Partial power converters (PPCs) process only a fraction of flowing power while the remaining power directly flows through output. This generally causes an improvement in efficiency and output voltage. A total of two structures are presented: conventional partial power T-source converters and improved partial power T-source converters. The key advantage of the improved partial power converter is a higher voltage gain. Furthermore, it reduces the voltage and the current stresses on switches and diodes. The steady-state operation principles are described for both converters and the governed rules and equations are derived. The PPCs and full power converter are compared in terms of efficiency, voltage gain, voltage stress, and current stress of converter elements. The converter performance is evaluated through experimental and simulation studies. The presented results show good consistency with the theoretical analysis.

Suggested Citation

  • Amirhossein Rajaei & Mahdi Shahparasti & Ali Nabinejad & Mehdi Savaghebi, 2020. "A High Step-Up Partial Power Processing DC/DC T-Source Converter for UPS Application," Sustainability, MDPI, vol. 12(24), pages 1-19, December.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:24:p:10464-:d:462099
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    Citations

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    Cited by:

    1. Feilong Yi & Faqiang Wang, 2023. "Review of Voltage-Bucking/Boosting Techniques, Topologies, and Applications," Energies, MDPI, vol. 16(2), pages 1-24, January.
    2. Maysam Abbasi & Ehsan Abbasi & Li Li & Behrouz Tousi, 2021. "Design and Analysis of a High-Gain Step-Up/Down Modular DC–DC Converter with Continuous Input Current and Decreased Voltage Stress on Power Switches and Switched-Capacitors," Sustainability, MDPI, vol. 13(9), pages 1-19, May.
    3. Tohid Rahimi & Md Rabiul Islam & Hossein Gholizadeh & Saeed Mahdizadeh & Ebrahim Afjei, 2021. "Design and Implementation of a High Step-Up DC-DC Converter Based on the Conventional Boost and Buck-Boost Converters with High Value of the Efficiency Suitable for Renewable Application," Sustainability, MDPI, vol. 13(19), pages 1-23, September.

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