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New multi-stage DC–DC converters for grid-connected photovoltaic systems

Author

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  • Hu, Yihua
  • Cao, Wenping
  • Ji, Bing
  • Si, Jikai
  • Chen, Xiangping

Abstract

Renewable energy is high on international and national agendas. Currently, grid-connected photovoltaic (PV) systems are a popular technology to convert solar energy into electricity. Existing PV panels have a relatively low and varying output voltage so that the converter installed between the PVs and the grid should be equipped with high step-up and versatile control capabilities. In addition, the output current of PV systems is rich in harmonics which affect the power quality of the grid. In this paper, a new multi-stage hysteresis control of a step-up DC–DC converter is proposed for integrating PVs into a single-phase power grid. The proposed circuitry and control method is experimentally validated by testing on a 600 W prototype converter. The developed technology has significant economic implications and could be applied to many distributed generation (DG) systems, especially for the developing countries which have a large number of small PVs connected to their single-phase distribution network.

Suggested Citation

  • Hu, Yihua & Cao, Wenping & Ji, Bing & Si, Jikai & Chen, Xiangping, 2015. "New multi-stage DC–DC converters for grid-connected photovoltaic systems," Renewable Energy, Elsevier, vol. 74(C), pages 247-254.
    • Handle: RePEc:eee:renene:v:74:y:2015:i:c:p:247-254
    DOI: 10.1016/j.renene.2014.08.009
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    Cited by:

    1. Fathabadi, Hassan, 2015. "Utilization of electric vehicles and renewable energy sources used as distributed generators for improving characteristics of electric power distribution systems," Energy, Elsevier, vol. 90(P1), pages 1100-1110.
    2. Mahela, Om Prakash & Shaik, Abdul Gafoor, 2017. "Comprehensive overview of grid interfaced solar photovoltaic systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 68(P1), pages 316-332.
    3. Hossain, M.Z. & Rahim, N.A. & Selvaraj, Jeyraj a/l, 2018. "Recent progress and development on power DC-DC converter topology, control, design and applications: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 81(P1), pages 205-230.

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