DocumentCode :
2150034
Title :
Analysis on Control Method VSCF Wind Power System
Author :
Yulong, Wang ; Guiping, Shao
Author_Institution :
Inst. of Electr. Eng., Chinese Acad. of Sci., Beijing
fYear :
2008
fDate :
30-31 Dec. 2008
Firstpage :
677
Lastpage :
680
Abstract :
By analyzing the operation behavior of an A.C. excited variable-speed constant-frequency (VSCF) wind-power generator, the field-oriented vector control technique and and the internal model controller (IMC) are transplanted into the voltage control of DFIG.The IMC were transplanted into the cutting-in control of the doubly-fed induction generator with no-load and a novel cutting-in control strategy was obtained. The strategy can realize cutting-in without accurate parameters of doubly-fed induction generator (DFIG) and the controller can be designed without accurate DFIG model. A dynamic model of variable pitch and variable speed wind turbine was developed. This model can be used simulate wind turbine and design pitch and toque controller. The research work presented in this paper is aimed to reduce pitch actuator fatigue and smooth output power above-rated power operating condition. To cope with the nonlinear characteristics of wind turbine and reduce the pitch actuator fatigue, a new control strategy for variable pitch variable speed wind turbine is proposed. In the proposed method a variable gains PD controller based on fuzzy control theory is used. The simulation results show that the controllers ensure very good robustness and adaptability under modeling uncertainty and external disturbance, and produce good dynamic performance.
Keywords :
PD control; asynchronous generators; control system synthesis; frequency control; fuzzy control; power generation control; robust control; torque control; velocity control; voltage control; wind power plants; wind turbines; DFIG; PD controller; VSCF wind power system; controller design; cutting-in control; doubly-fed induction generator; field-oriented vector control technique; fuzzy control theory; internal model controller; modeling uncertainty; operation behavior; pitch actuator fatigue; pitch controller; robustness; torque controller; variable-speed constant-frequency wind-power generator; voltage control; wind turbine; Actuators; Control system analysis; Control systems; Fatigue; Induction generators; Power system modeling; Voltage control; Wind energy; Wind energy generation; Wind turbines; Doubly-fed induction generator; Variable-speed constant frequency; field oriented vector control; fuzzy-PD controller; internal model controller; pitch control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
MultiMedia and Information Technology, 2008. MMIT '08. International Conference on
Conference_Location :
Three Gorges
Print_ISBN :
978-0-7695-3556-2
Type :
conf
DOI :
10.1109/MMIT.2008.47
Filename :
5089213
Link To Document :
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