论文信息 - Maximal wind energy capturing control strategy without wind speed detecting equipment

Maximal wind energy capturing control strategy without wind speed detecting equipment

Based on the analysis of the operating characteristics of wind turbine and the power relations of doubly-fed machine, a power calculation model of stator maximum power at any wind speed, whose input variable is the generator angular speed and output variable is the stator power reference value, is proposed in this paper. Then, by using the close-loop control method, whose reference variable is the stator active power of generator stator and the feedback variable is the stator actual active power, the control system automatically tracks the maximum power point via the power equilibrium without wind speed detecting equipment. In order to regulate the active and reactive power precisely, the field-oriented control technology is applied to decouple the active and reactive power of generator and, thereby, the feed-forward algorithm is also applied to eliminate the cross coupling component of rotor current. The simulation research is carried out using Matlab 7.5 and experiment research is carried using DSP 2407. The result of experiment and simulation testify the feasibility and security of the strategy proposed in this paper.

Jing Feng | Yifan Zhu | Qingling Wang

[1] Mona N. Eskander,et al. Fuzzy logic control based maximum power tracking of a wind energy system , 2001 .

[2] Torbjörn Thiringer,et al. Control by variable rotor speed of a fixed-pitch wind turbine operating in a wide speed range , 1993 .

[3] E. Muljadi,et al. Annualized wind energy improvement using variable speeds , 1997 .

[4] Li Yong-dong. STUDY ON EXCITATION CONVERTER OF VARIABLE SPEED CONSTANT FREQUENCY WIND GENERATION SYSTEM , 2005 .

[5] Longya Xu,et al. A flexible active and reactive power control strategy for a variable speed constant frequency generating system , 1993, Proceedings of IEEE Power Electronics Specialist Conference - PESC '93.

[6] Henk Polinder,et al. Dynamic modelling of a wind turbine with doubly fed induction generator , 2001, 2001 Power Engineering Society Summer Meeting. Conference Proceedings (Cat. No.01CH37262).

[7] Li Jing. MODELING AND DYNAMIC SIMULATION OF VARIABLE SPEED WIND TURBINE WITH LARGE CAPACITY , 2004 .

[8] Liuchen Chang,et al. An intelligent maximum power extraction algorithm for inverter-based variable speed wind turbine systems , 2004 .

[9] M. Yamamoto,et al. Active and reactive power control of doubly-fed wound rotor induction generator , 1990, 21st Annual IEEE Conference on Power Electronics Specialists.

[10] H.J. Beukes,et al. Maximum power point trackers for wind turbines , 2004, 2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551).