Control of grid-connected voltage source converters with LCL filter using a Linear Quadratic servocontroller with state estimator

Author

Huerta, F. ; Bueno, E. ; Cobreces, S. ; Rodriguez, F.J. ; Giron, C.

Author_Institution

Dept. of Electron., Alcala Univ., Alcala de Henares

fYear

2008

fDate

15-19 June 2008

Firstpage

3794

Lastpage

3800

Abstract

The aim of this paper is to propose a multivariable current controller of voltage source converters (VSC) connected to the grid through an LCL filter. The proposal is a linear quadratic (LQ) servocontroller, which uses a fullorder estimator to obtain the full state vector. Two kinds of estimators are proposed and compared: prediction estimator and Luenberger estimator. The behavior and robustness of the controller is tested in presence of grid disturbances and mismatches in the model parameters.

Keywords

electric current control; machine control; matrix algebra; power convertors; power filters; power grids; robust control; LCL filter; Luenberger estimator; full state vector; grid-connected voltage source converters; linear quadratic servocontroller; multivariable current controller; prediction estimator; robustness control; state estimator; voltage source converters; Converters; Nonlinear filters; Power conversion; Proposals; Reactive power; Robust control; Sensor phenomena and characterization; State estimation; Testing; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 2008. PESC 2008. IEEE

Conference_Location

Rhodes

ISSN

0275-9306

Print_ISBN

978-1-4244-1667-7

Electronic_ISBN

0275-9306

Type

conf

DOI

10.1109/PESC.2008.4592546

Filename

4592546