变桨距风力机多风况模拟系统研究

Study on Variable-pitch Wind Turbine Emulation System Based on Multiple Wind Conditions

基于风力机的特性,运用叶素理论、涡流理论修正风速及权系数分配叶素的改进方法,建立了变桨距风力机模型,在matlab中编制了m文件对上述模型进行了分析,结果表明该模型可以实现对风力机特性的精确模拟,然后,将m文件嵌入到matlab/simulink的M-function中,得到了在组合风速(基本风、随机风、阵风、渐变风)作用下的风力机功率响应曲线。最后,将仿真程序移植到伺服电机实验平台中,通过VBA编程与PLC控制相结合的方法实现了整个系统的实验模拟,实验结果与仿真结果完全吻合,证明了该模拟方法的正确性和实用性。

Based on wind turbine characteristics, the variable-pitch wind turbine model is buih using blade element theory, velocity revise method of trailing vortex and improved blade element division method according to weight coefficient. M-file program written in Matlab software is applied to analyze the model. The results show that this model can precisely reflect the characteristics of wind turbine. Then, M-file is integrated into M-function of Matlab/Simulink platform and the wind turbine power response curves under combined wind speed （ mean wind, turbulence, wind gust, wind speed ramp） are acquired. Finally, the simulation program is transferred to servo motor experimental platform and the experimental test of the whole system is implemented by combination of VBA programming and PLC control method. The experimental results make accordance with the simulation results, which proves that the imitation method is correct and practical.