【摘要】 针对非并网风电系统,搭建了风力机性能测试平台,设计了流场测量系统。利用该平台和测试系统,通过改变磁粉制动器的励磁电流实现对风轮转速的高精度控制。通过测量分析发现了风轮后气流旋转方向与风轮旋转方向相反的规律,得到了输出功率越大,其尾迹内气流的轴向速度越小的结论。该实验结果为定桨距变转速风力机的转速控制策略制定提供了依据,也为非并网风电系统风力机的优化和设计提供了参考。更多还原

【Abstract】 Taking non-grid-connected wind power system as the research object,a wind turbine testing platform is set up and a flow field measuring system is designed.On this platform,by changing the exciter current of the magnetic powder brake,the rotating speed of the wind turbine can be controlled with high accuracy.From the experiment results,it is found that the wake is developing in the opposite direction to the rotating wind turbine.And a conclusion can be given that the output power is getting larger when the axial velocity in the wake is smaller.These results provide base to establish the speed control model of the fixed-pitch variable-speed wind turbine,and reference to the optimization and design of non-grid-connected wind power system.更多还原