DocumentCode :
2708251
Title :
Doubly-Fed Induction Generator Control Under Voltage Sags
Author :
Lima, K. ; Luna, A. ; Rodriguez, P. ; Watanabe, E. ; Teodorescu, R. ; Blaabjerg, Frede
Author_Institution :
Power Electron. Lab., Fed. Univ. of Rio de Janeiro, Rio de Janeiro
fYear :
2008
fDate :
17-18 Nov. 2008
Firstpage :
1
Lastpage :
6
Abstract :
This paper proposes a new control technique to improve the fault-ride through capability of doubly fed induction generators (DFIG). In such generators the appearance of severe voltage sags at the coupling point make rise to high over currents at the rotor/stator windings, something that makes necessary to protect the machine as well as the rotor side power converter. As a difference with the most extended solution, that reduces these currents by means of the connection of a crowbar circuit, this works intends to enhance the DFIG´s response in such conditions without introducing extra hardware in the system. To this end, the proposed control system feedback the stator currents as the rotor current reference during the fault, until they are driven to their nominal values. The feasibility of this proposal has been proven by means of mathematical and simulation models, based on PSCAD/EMTDC.
Keywords :
asynchronous generators; machine control; machine protection; machine windings; power supply quality; PSCAD/EMTDC simulation models; control system feedback; crowbar circuit; doubly-fed induction generator control; machine fault; machine protection; power converter protection; rotor/stator windings; voltage sags; Circuit faults; Coupling circuits; Hardware; Induction generators; Power generation; Power quality; Power system protection; Rotors; Stator windings; Voltage control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Energy 2030 Conference, 2008. ENERGY 2008. IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
978-1-4244-2850-2
Electronic_ISBN :
978-1-4244-2851-9
Type :
conf
DOI :
10.1109/ENERGY.2008.4781064
Filename :
4781064
Link To Document :
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