A novel high step-up DC-DC converter for a microgrid system

Yi Ping Hsieh, Jiann Fuh Chen, Tsorng Juu Liang, Lung Sheng Yang

Research output: Contribution to journalArticlepeer-review

225 Citations (Scopus)


A novel high step-up dcdc converter for a distributed generation system is proposed in this paper. The concept is composed of two capacitors, two diodes, and one coupled inductor. Two capacitors are charged in parallel, and are discharged in series by the coupled inductor. Thus, high step-up voltage gain can be achieved with an appropriate duty ratio. The voltage stresses on the main switch and output diode are reduced by a passive clamp circuit. Therefore, low resistance RDS(ON) for the main switch can be adopted to reduce conduction loss. In addition, the reverse-recovery problem of the diode is alleviated, and thus, the efficiency can be further improved. The operating principle and steady-state analyses of the voltage gain are also discussed in detail. Finally, a 24-V input voltage, 400-V output voltage, and 400-W output power prototype circuit of the proposed converter are implemented in the laboratory to verify the performance.

Original languageEnglish
Article number5658160
Pages (from-to)1127-1136
Number of pages10
JournalIEEE Transactions on Power Electronics
Issue number4
Publication statusPublished - 2011

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering


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