Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Bidirectional Flyback Converter Design Methodology for Differential Power Processing Modules in PV Applications
Authors Seungbin Park ; Mina Kim ; Hoejeong Jeong ; Taewon Kim ; Katherine A. Kim ; Jee-Hoon Jung
DOI 10.6113/TKPE/2019.24.5.379
Page pp.379-387
ISSN 1229-2214
Keywords DPP(Differential Power Processing); Bidirectional converter; Photovoltaic; Flyback converter
Abstract A bidirectional flyback converter is a suitable topology for use in a PV-to-bus differential power processing (DPP) module for PV applications due to its electrical isolation capability, bidirectional power transfer, high step-up ratio, and simple circuit structure. However, the bidirectional flyback converter design should consider the effect of the output-side power switch utilized for bidirectional operation compared with that of the conventional flyback converter. This study presents the structure and design methodology of the bidirectional flyback converter for a PV DPP module. Magnetizing inductance is designed by calculating the power loss of converter components within the rated load range under the discontinuous conduction mode, which is unaffected by the reverse recovery characteristics of the anti-parallel diode of the output-side power switch. The validity of the proposed design methodology is verified using a 25 W bidirectional flyback converter prototype. The operational principles and the performance of the DPP operation are verified using practical DPP modules consisting of bidirectional flyback converters implemented according to the proposed design methodology.