Modular photovoltaic inverter with high-frequency DC/DC stage based on low-voltage FETs

Author

Giuliani, F. ; Barater, Davide ; Concari, Carlo ; Cova, P. ; Delmonte, N. ; Menozzi, R. ; Buticchi, Giampaolo ; Tarisciotti, Luca

Author_Institution

Dept. of Inf. Eng., Univ. of Parma, Parma, Italy

fYear

2014

fDate

14-18 Sept. 2014

Firstpage

39

Lastpage

46

Abstract

This paper proposes a multi-string DC/AC architecture for photovoltaic grid-connected converters intended using GaN FETs as switching devices. Three isolated DC/DC converters fed by separate strings supply the DC Link of a 7-level cascaded H-Bridge DC/AC multilevel inverter. Due to the great interest in power plants oriented to self-consumption, a DC/DC converter configuration with a battery system for energy storage is also considered. Extensive simulations of the control confirmed the capability of the architecture to handle the power flows required by the proposed application.

Keywords

DC-AC power convertors; DC-DC power convertors; bridge circuits; field effect transistors; gallium compounds; invertors; load flow; photovoltaic power systems; wide band gap semiconductors; 7-level cascaded H-bridge DC-AC multilevel inverter; GaN; battery system; isolated DC-DC converters; low-voltage FET; modular photovoltaic inverter; photovoltaic grid-connected converters; power flow; Batteries; Inverters; Photovoltaic systems; Switches; Topology;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion Congress and Exposition (ECCE), 2014 IEEE

Conference_Location

Pittsburgh, PA

Type

conf

DOI

10.1109/ECCE.2014.6953373

Filename

6953373