NDLI: Stator flux active damping by optimal rotor current injection for grid tied doubly-fed induction generator

Content Provider	IEEE Xplore Digital Library
Author	Hazra, Samir Bhattacharya, Subhashish
Copyright Year	2015
Description	Author affiliation: Electrical and Computer Engineering, North Carolina State University, Raleigh, USA (Hazra, Samir; Bhattacharya, Subhashish)
Abstract	Doubly-fed induction generator (DFIG) tied with grid and controlled in the stator flux oriented reference frame is known to have poor damping due to the large time constant of the stator circuit. Therefore, the stator flux exhibits sustained oscillation subjected to any disturbances. In this paper, we propose a state feedback control method to actively damp the oscillation by injecting optimal amount of rotor current. The controller is further modified to simplify the implementation of the control and to minimize the effect of current injection on the power converter rating. The modified controller can be termed as a suboptimal controller. The performance of the designed controllers are verified through simulation of the simplified model of DFIG with an arbitrary initial stator flux perturbation. The required rotor current injections are observed in each of the cases of design. Effect of current injection by different controller on the converter rating is also explained. The suboptimal control is implemented to damp the stator flux oscillation in a DFIG, used in wave energy conversion system (WECS). In WECS, the stator flux oscillation appears due to the phase sequence switching of the DFIG. Simulation results show that the active damping control improves the damping of the system.
Starting Page	1895
Ending Page	1901
File Size	577655
Page Count	7
File Format	PDF
e-ISBN	9781479979417
DOI	10.1109/IEMDC.2015.7409323
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-05-10
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Stators Rotors Damping Oscillators State feedback Inductance Eigenvalues and eigenfunctions rotor current injection Doubly-fed induction generators stator flux oscillation state feed back control optimal control active damping
Content Type	Text
Resource Type	Article

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