[1]HOU Tao,ZHANG Qiang.Multi-mode soft-switch variable-pitch control of wind turbines based on T-S fuzzy weighting[J].CAAI Transactions on Intelligent Systems,2018,13(4):625-632.[doi:10.11992/tis.201710009]
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Multi-mode soft-switch variable-pitch control of wind turbines based on T-S fuzzy weighting
CAAI Transactions on Intelligent Systems[ISSN 1673-4785/CN 23-1538/TP] Volume:
13
Number of periods:
2018 4
Page number:
625-632
Column:
学术论文—智能系统
Public date:
2018-07-05
- Title:
- Multi-mode soft-switch variable-pitch control of wind turbines based on T-S fuzzy weighting
- Keywords:
- wind turbines; electric variable pitch; T-S fuzzy weighting; multi-mode switching control; soft switch; switch oscillation; multi-mode; pitch control
- CLC:
- TP18;TM614
- DOI:
- 10.11992/tis.201710009
- Abstract:
- Variable-pitch control is an effective technique for ensuring the constant-power operation of wind turbines over the range of rated wind speeds. The frequent and strong action of a pitch actuator increases the mechanical fatigue load of wind turbines, affects the output quality of the generator, and reduces the service life of wind turbines. Most current switching methods switch only at a certain threshold, which causes switch oscillation. To address these issues, we propose a multi-mode soft switching variable-pitch control strategy based on Takagi-Sugeno (T-S) fuzzy weighting. In this method, intelligent and traditional controls are combined, based on the deviation of the real-time rotation speed of the generator from its rated rotation speed and the change rate of the real-time rotation speed. T-S fuzzy inference is also utilized to achieve a smooth transition in the output of the multi-mode controller by the use of fuzzy control, fuzzy adaptive proportional-integral-derivative control, and proportional-integral control to realize a soft switch. This method simultaneously employs the advantages of three kinds of control methods and solves the switch oscillation problem. In this study, we built a multi-mode soft-switch control model to address the variable pitch of permanent-magnet direct-drive wind turbines. The simulation results show that this method exhibits the advantages of the three control methods, overcomes switch oscillation, slows frequent action of the actuator, smooths the adjustment of the pitch angle, improves the precision of the output power, and reduces fluctuation.
- References:
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Last Update:
2018-08-25