A new approach for the connection of a three-level inverter to the power grid for applications in solar energy conversion

Author

Alepuz, Salvador ; Gilabert, Alex ; Argüelles, Elena ; Bordonau, Josep ; Peracaula, Juan

Author_Institution

Mataro Sch. of Eng., Barcelona, Spain

Volume

4

fYear

2002

fDate

5-8 Nov. 2002

Firstpage

3285

Abstract

This paper studies the connection of a photovoltaic energy system to the AC mains by means of a 3-level voltage source inverter (VSI). A proposal for modeling and controlling the inverter is presented, in order to have full controllability of the power transfer and the DC-link voltage balance. The steady-state, the transient analysis and the large-signal operation are studied and the control is implemented combining a linear quadratic regulator (LQR) and gain-scheduling technique. The method is verified using large signal, nonlinear discrete and averaged simulation models.

Keywords

controllability; invertors; linear quadratic control; multivariable control systems; photovoltaic power systems; power control; power system control; transient analysis; 3-level voltage source inverter; AC mains; DC-link voltage balance; VSI; averaged simulation models; controllability; gain-scheduling technique; inverter control; inverter modeling; large-signal operation; linear quadratic regulator; multivariable control; nonlinear discrete models; photovoltaic energy system; power grid; power transfer; solar energy conversion; steady-state; three-level inverter; transient analysis; Controllability; Inverters; Photovoltaic systems; Power grids; Power system modeling; Proposals; Solar energy; Solar power generation; Steady-state; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

IECON 02 [Industrial Electronics Society, IEEE 2002 28th Annual Conference of the]

Print_ISBN

0-7803-7474-6

Type

conf

DOI

10.1109/IECON.2002.1182925

Filename

1182925