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New direct Torque control of DFIG under balanced and unbalanced Grid voltage

DSpace at IIT Bombay

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Title New direct Torque control of DFIG under balanced and unbalanced Grid voltage
 
Creator PIMPLE, BB
VEKHANDE, VY
FERNANDES, BG
 
Subject switching frequency
converters
doubly-fed induction generator
direct torque control
unbalanced grid voltage
torque pulsations
proportional-integral and resonant controller
 
Description This paper presents a direct torque control method for doubly-fed induction generator (DFIG) based wind power generation systems. The angle and magnitude of rotor voltage are controlled to achieve independent control of electromagnetic torque and reactive power respectively. Space vector modulation is used to address the limitations like, variable switching frequency and torque ripple, of hysteresis based schemes. Further, this paper presents a technique to reduce the torque pulsations of DFIG under unbalanced grid voltage condition. Under unbalanced grid voltage condition, the torque angle (delta) is controlled so that electromagnetic torque pulsations are reduced. To achieve this, a compensation method based on proportional-integral and resonant (PI+R) controller is explored. The proposed control method does not require rotating frame transformations and it maintains the simplicity of DTC. It has fast dynamic response, which is comparable to vector control. Simulation results for a 2 MW DFIG system demonstrates the effectiveness of the proposed control strategy with various loading conditions under both balanced and unbalanced grid voltage.
 
Publisher IEEE
 
Date 2011-10-25T04:27:44Z
2011-12-15T09:11:26Z
2011-10-25T04:27:44Z
2011-12-15T09:11:26Z
2010
 
Type Proceedings Paper
 
Identifier TENCON 2010: 2010 IEEE REGION 10 CONFERENCE,2154-2158
978-1-4244-6890-4
0886-1420
http://dx.doi.org/10.1109/TENCON.2010.5686748
http://dspace.library.iitb.ac.in/xmlui/handle/10054/15602
http://hdl.handle.net/100/2070
 
Source IEEE Region 10 Conference on TENCON 2010,Fukuoka, JAPAN,NOV 21-24, 2010
 
Language English