Conversion structure based on a dual T-type three-level inverter for grid connected photovoltaic applications

Author

Fernao Pires, V. ; Foito, Daniel ; Sousa, Duarte M.

Author_Institution

Dept. of Electr. Eng., EST-Inst. Pol. Setubal / INESC-ID, Setubal, Portugal

fYear

2014

fDate

24-27 June 2014

Firstpage

1

Lastpage

7

Abstract

A conversion structure based on a multilevel inverter for grid connected photovoltaic applications is presented. The structure includes two T-type three-level inverter, which are connected to grid by a three-phase transformer with the open winding configuration on inverters side. It also includes two insolated strings of PV panels that are feeding each one of the T-type inverters. The obtained multilevel inverter allows obtaining fifty seven different voltage vectors. To control the dual T-type three-level inverter is used a sliding mode controller and a vectorial modulator. The proposed structure is analyzed and verified by numerical simulations. From the obtained results it is possible to confirm the effectiveness of the proposed structure.

Keywords

invertors; numerical analysis; photovoltaic power systems; power conversion; power generation control; power grids; power transformers; transformer windings; variable structure systems; conversion structure; dual T-type three-level inverter; grid connected photovoltaic application; multilevel inverter; numerical simulation; open winding configuration; sliding mode controller; string insolation; three-phase transformer; voltage vectorial modulator; Arrays; Equations; Inverters; Photovoltaic systems; Temperature; Vectors; Multilevel Inverter; Photovoltaic; T-type three-level inverter; open winding configuration;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics for Distributed Generation Systems (PEDG), 2014 IEEE 5th International Symposium on

Conference_Location

Galway

Type

conf

DOI

10.1109/PEDG.2014.6878685

Filename

6878685