Title :
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
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;
Conference_Titel :
Power Electronics Specialists Conference, 2008. PESC 2008. IEEE
Conference_Location :
Rhodes
Print_ISBN :
978-1-4244-1667-7
Electronic_ISBN :
0275-9306
DOI :
10.1109/PESC.2008.4592546
