Design and control of novel topology for photovoltaic DC/DC converter with high efficiency under wide load ranges

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

Research output: Contribution to journalArticle

35 Citations (Scopus)


In this paper, design and control is proposed for a four input-series-output-series-connected ZVS full bridge converter for the photovoltaic power conditioning system (PCS). The 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. The control scheme, including an input voltage controller is proposed to achieve equal sharing of the input voltage as well output voltages by a four series connected module. Design methods for ZVS power stage are also introduced. 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 and uses only one-third of the total PV PCS power. The 25-kW prototype PV DC/DC converter is introduced to verify experimentally the proposed topology. In addition, an experimental result shows that the proposed topology exhibits good performance.

Original languageEnglish
Pages (from-to)300-307
Number of pages8
JournalJournal of Power Electronics
Issue number2
Publication statusPublished - 2009 Mar 20



  • DC/DC converter
  • ISOS(input-series-output-series-connected)
  • PV PCS
  • ZVS(Zero Voltage Switching)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Control and Systems Engineering

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