Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Analysis of dual-input three-port isolated DC-DC converter with bidirectional capability

  • Subramanian, Arulmozhi (Department of Electrical and Electronics Engineering, Sri Venkateswara College of Engineering, Anna University) ;
  • Karuppiah, Santha (Department of Electrical and Electronics Engineering, Sri Venkateswara College of Engineering, Anna University)
  • Received : 2021.08.14
  • Accepted : 2022.02.11
  • Published : 2022.04.20
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Abstract

Multiport converters gain prominent importance in electric vehicle (EV) and DC micro-grid applications for their capability to integrate multiple renewable power sources and energy storage systems. The stored energy in the battery balances the load demand during intermittent power generation from the photovoltaic (PV) source. However, charging the drained battery in the complete absence of PV power interrupts the overall operation of the system. Hence, a modified dual-input three-port isolated bidirectional converter is proposed to handle bidirectional power transfer in the output port and to utilize available power for battery charging. Implementation of a mode selection logic controller with optimal maximum power point tracking and pulse width modulated controllers improves the reliability of the converter. The equivalent circuit of the proposed topology and its mathematical model help evaluate the loss of components at different conduction intervals. The computed device losses, inductor and capacitor equivalent series resistance losses, and other losses clearly depict the effect on the performance of the proposed converter. Thus, the predicted efficiency is validated by the experimental data of the laboratory prototype, substantiating the performance of the converter.

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References

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