Modeling and digital control of a high-power full-bridge isolated DC-DC buck converter designed for a two-stage grid-tie PV inverter

Author

Nascimento Filho, Paulo Sergio ; Ruffeil de Oliveira, Leonardo ; dos Santos Barros, Tarcio Andre ; Gradella Villalva, Marcelo ; Ruppert Filho, Ernesto

Author_Institution

LEPO-FEEC, Univ. of Campinas-UNICAMP, Campinas, Brazil

fYear

2014

fDate

14-18 Sept. 2014

Firstpage

1874

Lastpage

1879

Abstract

This paper describes a grid-tie photovoltaic (PV) inverter composed of an isolated full-bridge buck DC-DC converter with high-frequency transformer and a cascaded DC-AC full-bridge inverter connected to the grid. Emphasis is given on the modeling and digital control design of the DC-DC converter with the polynomial pole placement method. Simulation results are presented and a inverter prototype is currently being built.

Keywords

DC-DC power convertors; bridge circuits; digital control; high-frequency transformers; invertors; photovoltaic power systems; polynomials; cascaded DC-AC full-bridge inverter; digital control; full-bridge isolated DC-DC buck converter; grid-tie photovoltaic inverter; high-frequency transformer; polynomial pole placement method; Arrays; Control systems; DC-DC power converters; Inverters; Mathematical model; Polynomials; Voltage control; Photovoltaic grid tie inverter; digital control; isolated full-bridge buck; polynomial pole placement;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion Congress and Exposition (ECCE), 2014 IEEE

Conference_Location

Pittsburgh, PA

Type

conf

DOI

10.1109/ECCE.2014.6953647

Filename

6953647