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

Amirhossein Rajaei, Mahdi Shahparasti, Ali Nabinejad and Mehdi Savaghebi
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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

Sustainability, 2020, vol. 12, issue 24, 1-19

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.

Keywords: DC/DC converter; partial power processing converter; T-source converter; high voltage gain; uninterruptible power supply (UPS) (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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