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| Control strategy for operation of large-scale wind turbines above cut-out wind speeds |
| Received:March 29, 2014 Revised:August 12, 2014 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201503011 |
| KeyWord:large-scale wind turbine cut-out wind speed control strategy blade element momentum theory aeroelastic genetic algorithm |
| Author | Institution |
| 许波峰 |
河海大学 能源与电气学院, 南京 |
| 曹九发 |
南京航空航天大学 江苏省风力机设计高技术研究重点实验室, 南京 |
| 袁越 |
河海大学 能源与电气学院, 南京 |
| 王同光 |
南京航空航天大学 江苏省风力机设计高技术研究重点实验室, 南京 |
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| Abstract: |
| The dynamic equation of wind turbines,in which the blade loads including the unsteady aerodynamic loads by using the blade element momentum (BEM) theory,the gravity loads and the inertial loads,is developed.The variable-speed variable-pitch and the constant-speed variable-pitch control strategies are studied for operation of the large-scale wind turbines above cut-out wind speeds.The pitch angle and rotor speed regular curves from 25 m/s to 40 m/s are obtained based on the fast and elitist non-dominated sorting genetic algorithm (NSGA).From the output electric power,rotor thrust and low speed shaft torque,it is clear that the variable-speed variable-pitch control strategy is more suitable for the wind turbine above cut-out wind speeds.Eight types of blade root ultimate loads under the steady cases are predicted.Fy increases by 9% and other loads are safe by observing their variation trends. |