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A Review on Transformerless Step-Up Single-Phase Inverters with Different DC-Link Voltage for Photovoltaic Applications

Author

Listed:
  • Wenjie Liu

    (Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark)

  • Kamran Ali Khan Niazi

    (Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark)

  • Tamas Kerekes

    (Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark)

  • Yongheng Yang

    (Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark)

Abstract

Photovoltaic (PV) energy has been competitive in power generation as an alternative to fossil energy resources over the past decades. The installation of grid-connected solar energy systems is expected to increase rapidly with the fast development of the power electronics technology. As the key to the interface of the PV energy and the grid, power converters should be reliable, efficient and comply with the grid requirements. Considering the nature of PV energy, the power conversion should be flexible (e.g., high step-up DC-DC conversion and harmonic-free DC-AC conversion). Accordingly, many power electronic converters have been reported in literature. Compared with isolated inverters, transformerless inverters show great advantages. This paper thus presents an overview of the transformerless step-up single-phase inverters for PV applications based on the dc-link configurations. Grid-connected PV inverters are classified as constant dc-link voltage structures, pseudo-dc-link voltage structures, pulsating dc-link voltage structures and integrated dc-link voltage structures. The discussion on the composition of different dc-link structures is presented, which provides guidance to select appropriate transformerless inverter topologies for PV applications.

Suggested Citation

  • Wenjie Liu & Kamran Ali Khan Niazi & Tamas Kerekes & Yongheng Yang, 2019. "A Review on Transformerless Step-Up Single-Phase Inverters with Different DC-Link Voltage for Photovoltaic Applications," Energies, MDPI, vol. 12(19), pages 1-17, September.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:19:p:3626-:d:269919
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    References listed on IDEAS

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    1. João Martins & Sergiu Spataru & Dezso Sera & Daniel-Ioan Stroe & Abderezak Lashab, 2019. "Comparative Study of Ramp-Rate Control Algorithms for PV with Energy Storage Systems," Energies, MDPI, vol. 12(7), pages 1-15, April.
    2. Kamran Ali Khan Niazi & Yongheng Yang & Mashood Nasir & Dezso Sera, 2019. "Evaluation of Interconnection Configuration Schemes for PV Modules with Switched-Inductor Converters under Partial Shading Conditions," Energies, MDPI, vol. 12(14), pages 1-12, July.
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    Cited by:

    1. Robert Stala & Zbigniew Waradzyn & Szymon Folmer, 2020. "DC-DC High-Voltage-Gain Converters with Low Count of Switches and Common Ground," Energies, MDPI, vol. 13(21), pages 1-22, October.
    2. Xiumei Yue & Hongliang Wang & Xiaonan Zhu & Xinwei Wei & Yan-Fei Liu, 2020. "A Topology Synthetization Method for Single-Phase, Full-Bridge, Transformerless Inverter with Leakage Current Suppression Part I," Energies, MDPI, vol. 13(2), pages 1-19, January.
    3. Denis Pelin & Matej Žnidarec & Damir Šljivac & Andrej Brandis, 2020. "Fast Power Emulation Approach to the Operation of Photovoltaic Power Plants Made of Different Module Technologies," Energies, MDPI, vol. 13(22), pages 1-17, November.

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