Power regulation strategy of downwind wind turbines based on cone angle control
The power regulation strategies for small and medium-sized downwind wind turbines were studied.Firstly,the aerodynamic performance of the 100W downwind wind turbine was explored by the simulation cal-culation and wind tunnel experiments.Then,the influence mechanism of the rotor cone angle on the output power and blade root load of the wind turbine was analyzed.It is concluded that the output power is positively correlated with the third power of the cosine of the cone angle,and the blade root load is positively correlated with the square of the cone angle cosine value.Finally,the active and passive power regulation strategies were developed for downwind wind turbines based on cone angle control.Research results show that the active regu-lation strategy can effectively control the output power of the rotor when the wind speed exceeds the rated speed,and can reduce the peak load of the blade root by 14.2％.When operating at excess wind speed,the passive regulation strategy can reduce the average deviation between output power and rated power by 20.84 W compared with that without the control.Both active and passive regulation strategies can effectively control the output power of the downwind wind turbine when the wind speed exceeds the rated speed.
万方数据
维普
