High gain high efficiency front end resonant dc-dc boost converter for PV microinverter

Author

Chakraborty, Shiladri ; Sensarma, Parthasarathi

Author_Institution

Dept. of Electr. Eng., Indian Inst. of Technol., Kanpur, India

fYear

2012

fDate

15-20 Sept. 2012

Firstpage

180

Lastpage

187

Abstract

Interfacing a single PV module to the grid as in a PV microinverter requires a high step-up gain. This paper presents a voltage-stiff-output LLC tank based resonant boost dc/dc converter with inherent isolationas the input dc-dc stage of a PV microinverter. Characteristics of the tank network are derived and a novel control strategy is suggested which ensures MPPT. An additional loop is incorporated for excitation frequency control to ensure peak-gain operation under variation in tank parameters. Detailed design procedure for the tank are provided, starting from the analytical derivation of the basic design equations. Finally numerical simulation and experimental results are presented.

Keywords

DC-DC power convertors; frequency control; maximum power point trackers; numerical analysis; photovoltaic power systems; power generation control; resonant power convertors; MPPT; PV microinverter; excitation frequency control; high gain high efficiency front end resonant DC-DC boost converter; numerical simulation; peak-gain operation; power grid; single PV module; step-up gain; voltage-stiff-output LLC tank network; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion Congress and Exposition (ECCE), 2012 IEEE

Conference_Location

Raleigh, NC

Print_ISBN

978-1-4673-0802-1

Electronic_ISBN

978-1-4673-0801-4

Type

conf

DOI

10.1109/ECCE.2012.6342825

Filename

6342825