DocumentCode :
3512046
Title :
Control of grid-connected voltage source inverter with LCL filter
Author :
Eren, Suzan ; Bakhshai, Alireza ; Jain, Praveen
Author_Institution :
Dept. of Electr. & Comput. Eng., Queen´´s Univ., Kingston, ON, Canada
fYear :
2012
fDate :
5-9 Feb. 2012
Firstpage :
1516
Lastpage :
1520
Abstract :
This paper presents a control scheme for a grid-connected three-phase voltage source inverter with an LCL filter, which is suited for renewable energy applications. The proposed method has the following properties: fast tracking, optimized dynamics, grid disturbance rejection, and active resonance damping. The controller is based on an augmented linear quadratic regulation (LQR) scheme, which is optimized based on a weighted cost function. The LQR controller is augmented to include two complex conjugate poles at the grid frequency for sinusoidal voltage disturbance rejection upon connection to the grid. Furthermore, this control scheme actively damps the resonance introduced into the closed-loop system through the third-order LCL filter. Finally, the current reference is found by calculating the instantaneous power, which allows for faster power tracking compared to using the technique of measuring average power. Results verify the validity of the proposed control scheme.
Keywords :
invertors; linear quadratic control; power grids; power system control; power system faults; voltage control; active resonance damping; augmented LQR controller scheme; augmented linear quadratic regulation scheme; average power measurement; closed-loop system; complex conjugate pole; dynamic optimization; fast tracking; grid disturbance rejection; grid frequency; grid-connected three-phase voltage source inverter; power tracking; renewable energy application; sinusoidal voltage disturbance rejection; third-order LCL filter; weighted cost function; Damping; Harmonic analysis; Inverters; Power harmonic filters; Renewable energy resources; State feedback; Voltage control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Applied Power Electronics Conference and Exposition (APEC), 2012 Twenty-Seventh Annual IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4577-1215-9
Electronic_ISBN :
978-1-4577-1214-2
Type :
conf
DOI :
10.1109/APEC.2012.6166021
Filename :
6166021
Link To Document :
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