Title :
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
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;
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
DOI :
10.1109/ECCE.2012.6342825
