DocumentCode :
81510
Title :
Sensorless Control of Doubly Fed Induction Generators Based on Stator High-Frequency Signal Injection
Author :
Diaz Reigosa, David ; Briz, Fernando ; Blanco, Cristian ; Guerrero, Josep M.
Author_Institution :
Dept. of Electr., Electron., Comput. & Syst. Eng., Univ. of Oviedo, Gijón, Spain
Volume :
50
Issue :
5
fYear :
2014
fDate :
Sept.-Oct. 2014
Firstpage :
3382
Lastpage :
3391
Abstract :
High-frequency-signal-injection-based methods have been widely investigated for sensorless position/speed control of induction machines (IMs), permanent magnet synchronous machines (PMSMs), and, more recently, doubly fed induction generators (DFIGs). When used with IMs and PMSMs, the high-frequency signal is injected in the stator windings, an asymmetric (salient) rotor being required for this case. Contrary to this, both stator and rotor terminals are accessible and sensored in DFIGs, being therefore possible to inject the high-frequency signal either in the stator or the rotor terminals. As a consequence of this, the method can be used even if the machine is nonsalient. In the implementation of the method with DFIGs, the high-frequency voltage signal is typically injected in the rotor, the high-frequency components (voltages of currents) induced in the stator being used for rotor position estimation. A drawback of this alternative is that the method is sensitive to the grid impedance in the stator side, which will be affected by the grid configuration, and is normally unknown. This paper proposes the sensorless control of a DFIG injecting the high-frequency voltage in the stator side and using a high-frequency current cancellation strategy in the rotor side. The main advantage of the proposed strategy is that the estimated position is independent of the grid characteristics.
Keywords :
angular velocity control; asynchronous generators; permanent magnet generators; position control; rotors; sensorless machine control; stators; synchronous generators; DFIG; IM; PMSM; asymmetric rotor; doubly fed induction generator; grid impedance; high-frequency current cancellation strategy; induction machine; permanent magnet synchronous machines; position estimation; rotor position estimation; rotor terminals; sensorless position control; sensorless speed control; stator high-frequency signal injection; stator terminals; stator windings; Frequency control; Hafnium; Regulators; Rotors; Stators; Vectors; Voltage control; Doubly fed induction generator (DFIG); high-frequency signal injection; sensorless control;
fLanguage :
English
Journal_Title :
Industry Applications, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-9994
Type :
jour
DOI :
10.1109/TIA.2014.2303255
Filename :
6728618
Link To Document :
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