| |
Stability Analysis of Current Digital Controllers for LCL Filters Connected to the Grid using State Feedback
| [View]
[Download]
|
| Author(s) |
Ivan Jorge Gabe; Jorge Rodrigo Massing; Vinicius F. Montagner; Humberto Pinheiro |
| Abstract |
This paper addresses the stability of discrete controlled grid connected voltage source inverters with
LCL-filter usually found in wind power generation systems. First a theorem that relates the controllability
of the discrete dynamic equation with the LCL-filter parameters and the sampling frequency is derived.
Then, a robust partial state feedback design on the linear matrix inequalities framework guarantee the
stability damping the LCL-filter resonance for a large set of grid conditions without requiring tuning
procedures. Finally, an internal model controller is added to ensure asymptotic reference tracking and
disturbance rejection, therefore reducing significantly the impact of grid background voltage distortion
on the line currents. Simulation and experimental results are presented to support the theoretical analysis
carried out and to demonstrate the system performance. |
| Download |
| Filename: | Unnamed file |
| Filesize: | 838.8 KB |
|
| Type |
Members Only |
| Date |
Last modified 2008-01-18 by System |
| |
 |