Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Non-isolated buck based three port DC-DC converter for medium power standalone photovoltaic applications

  • Satabdi Bhattacharya (Department of Electrical Engineering, National Institute of Technology Rourkela) ;
  • Susovon Samanta (Department of Electrical Engineering, National Institute of Technology Rourkela)
  • Received : 2022.07.18
  • Accepted : 2023.04.12
  • Published : 2023.10.20
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Abstract

The design and development of a non-isolated buck-based three-port dc-dc converter for medium-power standalone PV systems are presented in this paper. The topology is obtained from a parallel connection of conventional buck and boost converters. An attractive feature of this converter is the implementation of a buck topology at the PV side, which ensures cost-effective PV panel wiring, reduced converter development cost, and better efficiency of the PV system during low irradiation periods when compared to its boost counterpart. The proposed converter includes three operating modes based on load power requirements and PV power generation. An autonomous mode transition algorithm is proposed for seamless transitions between various operating modes. The design methodology, losses, and operation of the converter are discussed in this paper. A low-cost and efficient 2 kW laboratory prototype model of the proposed converter has been developed. Experimental validations are provided to showcase the effectiveness and viability of the proposed converter under various operating conditions.

Keywords

References

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