A safety enhanced, high step-up DC-DC converter for AC photovoltaic module application

Shih Ming Chen, Tsorng Juu Liang, Lung Sheng Yang, Jiann Fuh Chen

Research output: Contribution to journalArticle

124 Citations (Scopus)

Abstract

Within the photovoltaic (PV) power-generation market, the ac PV module has shown obvious growth. However, a high voltage gain converter is essential for the modules grid connection through a dc-ac inverter. This paper proposes a converter that employs a floating active switch to isolate energy from the PV panel when the ac module is off; this particular design protects installers and users from electrical hazards. Without extreme duty ratios and the numerous turns-ratios of a coupled inductor, this converter achieves a high step-up voltage-conversion ratio; the leakage inductor energy of the coupled inductor is efficiently recycled to the load. These features explain the modules high-efficiency performance. The detailed operating principles and steady-state analyses of continuous, discontinuous, and boundary conduction modes are described. A 15V input voltage, 200V output voltage, and 100W output power prototype circuit of the proposed converter has been implemented; its maximum efficiency is up to 95.3 and full-load efficiency is 92.3.

Original languageEnglish
Article number6031927
Pages (from-to)1809-1817
Number of pages9
JournalIEEE Transactions on Power Electronics
Volume27
Issue number4
DOIs
Publication statusPublished - 2012 Feb 29

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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