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Adaptive control for grid-connected DFIG wind power generation system

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3 Author(s)
Zhiguo Gao ; Inst. of Electr. Eng., Yanshan Univ., Qinhuangdao, China ; Xiaohong Jiao ; Chaobo Ge

A novel control strategy is presented for the back-to-back PWM converters of the grid-connected DFIG wind power system to enhance the transient performance and reliability of the overall system during physical parameter uncertainty and certain grid disturbance. The system description is modeled by using the field-oriented vector of the stator and voltage-oriented vector of grid control. The rotor-side and grid-side converter controllers are designed in integration by utilizing nonlinear adaptive control technology. The theoretical analysis shows that the proposed controller can guarantee the system to achieve the maximal absorption of wind power, constant dc-bus voltage, and constant voltage constant frequency output with respect to variable wind-speed, parameter uncertainties and disturbance. The effectiveness of the proposed strategy is validated by the simulation comparison with the conventional PID controller.

Published in:

Power Engineering and Automation Conference (PEAM), 2011 IEEE  (Volume:1 )

Date of Conference:

8-9 Sept. 2011