Modelling, control, and performance study of cascaded inverter based grid connected PV system

Author

Kumar, Nayan ; Saha, Tapas Kumar ; Dey, Jayati ; Barman, Jitesh Chandra

Author_Institution

Dept. of Electr. Eng., NIT Durgapur, Durgapur, India

fYear

2015

fDate

24-26 March 2015

Firstpage

1

Lastpage

6

Abstract

This paper describes a three-phase grid-connected photovoltaic (PV) generation system, using a vector controlled cascaded two-level inverter (CTLI). The system is operated to supply different active power, with variable solar irradiance. Two different schemes have been considered here to operate the inverters with either equal or unequal dc-link voltages. The unequal voltage is chosen to reduce certain harmonics in the output. In both the cases, the solar radiation has been changed in the input of solar modules, and the proposed control scheme is shown to achieve satisfactory voltage regulation for the inverters. The effects of connecting LCL filters, to the vector controlled systems, are also studied here in the simulation environment.

Keywords

harmonics suppression; invertors; photovoltaic power systems; power generation control; power grids; solar cells; solar radiation; voltage control; CTLI; LCL filter; cascaded inverter based grid connected PV system; harmonic reduction; solar module; solar radiation; three-phase grid-connected photovoltaic generation system; vector controlled cascaded two-level inverter; voltage regulation; Active filters; Capacitors; Harmonic analysis; Inverters; Mathematical model; Power harmonic filters; Voltage control; LCL filter; cascaded two-level inverter; photovoltaic system; total harmonic distortion; vector control;

fLanguage

English

Publisher

ieee

Conference_Titel

Renewable Energy Congress (IREC), 2015 6th International

Conference_Location

Sousse

Type

conf

DOI

10.1109/IREC.2015.7110884

Filename

7110884