2012
IMAACA 2012 Proceeding
Unknown input observer for detecting current sensor faults for a DFIG in wind turbine
Authors: Hakim Ouyessaad, Houcine Chafouk
Abstract
The objective of this paper is to detect and isolate the presence of sensor faults in dynamical systems. Unknown input observers are used which is then used to generate residuals based on the DOS observer architecture (Dedicated Observer Scheme). This diagnosis strategy is applied on the double-feed induction generator (DFIG) in wind turbines. The structure of a DOS is used for detection and isolation of multiple sensor faults. The approach is validated using signals obtained from a simulated DFIG system. The main contribution of this paper is the modelling of induction generator for wind turbines and the use unknown input observers to detect multiples and simultaneous faults in current sensors. The simulation model of DFIG is developed using MATLAB.
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