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A Low Q Three-Phase Series Resonant Converter for PV Applications

Author

Listed:
  • Abirami Kalathy

    (Department of Electrical and Computer Engineering, Queen’s University, Kingston, ON K7L 3N6, Canada)

  • Arpan Laha

    (Department of Electrical and Computer Engineering, Queen’s University, Kingston, ON K7L 3N6, Canada)

  • Majid Pahlevani

    (Department of Electrical and Computer Engineering, Queen’s University, Kingston, ON K7L 3N6, Canada)

  • Praveen Jain

    (Department of Electrical and Computer Engineering, Queen’s University, Kingston, ON K7L 3N6, Canada)

Abstract

In this paper, a soft-switched three-phase resonant converter with a low quality factor (Q) design is proposed for Photovoltaic (PV) energy harvesting systems with a very wide range of operating conditions. Due to the low quality factor (Q ≤ 1), the voltage stress across the capacitors is drastically reduced. However, a major challenge of using a low Q design is the wide switching frequency range required for operation over a wide range of load and input conditions. In order to reduce the switching frequency range, this paper introduces a hybrid modulation technique employing asymmetric pulse width modulation (APWM) along with variable frequency modulation. The proposed modulation scheme also substantially extends the soft-switching range of the converter from full-load upto 10–35% load condition over a wide range of line voltages. To sustain soft-switching in the entire operating region of the converter, the converter is operated in a hybrid structure with single-phase and burst modes at light load conditions. A comprehensive time-domain analysis of the proposed converter is presented, which greatly improves accuracy over conventional frequency-domain modeling. Experimental results from a 1 kW prototype are presented to verify the performance of the converter and validate the theoretical analysis.

Suggested Citation

  • Abirami Kalathy & Arpan Laha & Majid Pahlevani & Praveen Jain, 2023. "A Low Q Three-Phase Series Resonant Converter for PV Applications," Energies, MDPI, vol. 16(4), pages 1-23, February.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:4:p:1707-:d:1062222
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    References listed on IDEAS

    as
    1. Jing-Yuan Lin & Hsuan-Yu Yueh & Yi-Feng Lin & Pin-Hsien Liu, 2022. "Analysis and Design of Three-Phase LLC Resonant Converter with Matrix Transformers," Energies, MDPI, vol. 15(4), pages 1-18, February.
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