A Novel MPPT algorithm for dual-inverter grid-connected PV applications

Author

Grandi, Gabriele ; Ostojic, Darko ; Rossi, Claudio

Author_Institution

Dept. of Electr. Eng., Univ. of Bologna, Bologna, Italy

fYear

2009

Firstpage

1

Lastpage

10

Abstract

A novel MPPT algorithm for three-phase grid-connected photovoltaic generation systems is presented in this paper. Reference is made to a conversion scheme consisting in two balanced arrays of PV modules, each one feeding a standard 2-level three-phase voltage source inverter (VSI). The dc-link voltages of each VSI are regulated according with the requirement of the proposed MPPT algorithm, based on the comparison of the operating points of the two PV arrays. Inverters are connected to grid by a three-phase transformer with open-end windings configuration on inverters side. The resulting conversion structure performs as a power active filter, doubling the power capability of a single VSI, with the additional benefit of multilevel voltage waveforms. The proposed MPPT algorithm has been successfully verified by experimental tests.

Keywords

active filters; invertors; photovoltaic power systems; power filters; power grids; power transformers; dual-inverter grid-connected PV applications; maximum power point trackers; multilevel voltage waveforms; power active filter; standard 2-level three-phase voltage source inverter; three-phase grid-connected photovoltaic generation systems; three-phase transformer; Choppers; Costs; Inverters; Mesh generation; Phase transformers; Photovoltaic systems; Power transformer insulation; Solar power generation; Topology; Voltage; Multilevel converters; Photovoltaic; Power conditioning; Voltage Source Inverters;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Applications, 2009. EPE '09. 13th European Conference on

Conference_Location

Barcelona

Print_ISBN

978-1-4244-4432-8

Electronic_ISBN

978-90-75815-13-9

Type

conf

Filename

5278670