Published February 24, 2025 | Version 1
Journal article Open

Interleaved Quadratic Boost DC-DC Converter with Extended Voltage Gain and Reduced Switch Voltage Stress for Photovoltaic Applications

Authors/Creators

  • 1. Department of Electrical and Computer Engineering (DEEC), Nova University of Lisbon, Faculdade de Ciência e Tecnologia (FCT), 2829-516 Caparica, Portugal, CTS-UNINOVA and LASI, Portugal, LASI, Portugal
  • 2. Polytechnic Institute of Setubal, Department of Electrical Engineering (DEE), Escola Superior de Tenologia de Setúbal, Campus do IPS, Estefanilha, Setúbal, 2914-508, Portugal
  • 3. PolyTechnic University of Lisbon, Department of Electrical Engineering Energy and Automation, Instituto Superior de Engenharia de Lisboa (ISEL), Rua Conselheiro Emídio Navarro, Lisboa, 1, 1959-007, Portugal
  • 4. INESC-ID Lisboa, Rua Alves Redol, Lisboa, 9, 1000-029, Portugal
  • 5. Department of Electrical and Computer Engineering (DEEC), University of Lisbon, Instituto Superior Técnico, Av. Rovisco Pais, Lisboa, 1, 1049-001, Portugal

Description

This paper shows the study, development, and results of a new Direct-Current to Direct-Current (DC-DC) electric power converter topology, designated as interleaved quadratic Boost DC-DC converter topology. The converter topology is capable of achieving significantly higher voltage gains (higher voltage in the output when compared with the input voltage) than most conventional existing topologies. A theoretical approach was introduced in this paper and then validated through some computer simulations (using MATLAB/SIMULINK software). Finally, the performance of the topology was also confirmed in an experimental setup using a practical prototype of the proposed converter. From the experimental results, it was possible to achieve a maximum output voltage gain of over eight times the input voltage. An efficiency analysis (allowing us to identify the energy losses during the operation of the converter) was also performed, showing that the proposed topology converter maintains a very high efficiency, around 95% to 96%. The optimal operating point was also identified, based on the duty cycle (turn-on and turn-off of the power devices at a certain frequency), where the converter operates at maximum efficiency. The results show that the proposed converter has a very high potential for applications that require high-voltage gain, such as photovoltaic solar systems or even electrical vehicles or energy storage systems.

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Cites
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