A novel topology for photovoltaic DC/DC full-bridge converter with flat efficiency under wide PV module voltage and load range

Jong Pil Lee, Byung Duk Min, Tae Jin Kim, Dong Wook Yoo, Ji Yoon Yoo

    Research output: Contribution to journalArticlepeer-review

    101 Citations (Scopus)

    Abstract

    In this paper, a novel topology for a photovoltaic (PV) dc/dc converter that can dramatically reduce the power rating and increase the efficiency of a PV system by analyzing PV module characteristics is proposed. Based on the analysis, in the proposed topology, only 30.7% power of the total PV system is needed for a dc/dc converter. Furthermore, the dc/dc converter efficiency curve is flat under wide PV module voltage and all load ranges. In particular, the converter efficiency at the lower duty range is dramatically improved. The total PV system is implemented for a 250-kW PV power conditioning system (PCS). This system has only three dc/dc converters with a 25-kW power rating. It is only one-third of the total PV PCS power. The 25-kW prototype PV dc/dc converter is introduced to experimentally verify the proposed topology. In addition, an experimental result shows that the proposed topology exhibits a good performance.

    Original languageEnglish
    Pages (from-to)2655-2663
    Number of pages9
    JournalIEEE Transactions on Industrial Electronics
    Volume55
    Issue number7
    DOIs
    Publication statusPublished - 2008 Jul

    Bibliographical note

    Funding Information:
    Manuscript received October 24, 2007; revised April 7, 2008. This work was supported by a Korea University Grant. J.-P. Lee, B.-D. Min, T.-J. Kim, and D.-W. Yoo are with the Korea Electrotechnology Research Institute, Changwon 641-600, Korea (e-mail: [email protected]; [email protected]; [email protected]; [email protected]). J.-Y. Yoo is with the Department of Electrical Engineering, Korea University, Seoul 136-701, Korea (e-mail: [email protected]). Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/TIE.2008.924165

    Keywords

    • DC/DC full-bridge converter
    • Photovoltaic (PV) power conditioning system (PCS)
    • Voltage balance control
    • Zerovoltage switching (ZVS)

    ASJC Scopus subject areas

    • Control and Systems Engineering
    • Electrical and Electronic Engineering

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