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| Sliding Mode Control of Pitch Angle Based on RBF Neural-Network |
| Qin Bin,Zhou Hao,Du Kang,Wang Xin |
| Hunan University of Technology Zhuzhou 412000 China |
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Abstract Owing to the stochastic nature of wind speed,time-variable of parameters,system lagging and system nonlinearities the power generated by wind turbines appears to instable change. To improve the dynamic performance in the operation region of constant power output,a sliding mode variable structure controller using RBF neural network is proposed based on analyses of the features of wind turbine generator system. The initial centers through a FCM algorithm and the weights of network is obtained through recursive least squares(RLS) in off-line training. The sliding mode error is introduced in the adaptive law to improve the performance of the systems. The strategy mentioned above has such advantages as strong ability of rejecting chattering,well robust to the variation of parameter and fast response. Coupled with neural network control it also effectively reduces the chattering of only using a sliding mode variable structure control system. The simulink model of variable pitch system is built with Matlab/Simulink and simulation results also were compared. The results show that the controller has strong adaptability,good robustness and dynamic performance.
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Received: 25 December 2012
Published: 11 December 2013
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2013, Vol. 28 
