变桨距风力机分区段模拟方法及其控制策略

Sectioned Simulation of Variable Blade Pitch Wind Turbine and Its Control Strategy

风力强度不同,实际变桨距风力机的工作方式不同,风力机的输入输出关系也不同。分析了风力机在各个工作区的工作特性,得到了风力机在各个区段功率输出与风速的关系,给出了不同区段风力发电机的模拟方法。运用模糊直接转矩控制异步电动机,模拟不同情况下风力发电机的输出特性。仿真结果表明,该方法能较准确和全面地模拟风力机在整个风力发电过程的工作特性。

Actual wind turbine with variable blade pitch adopts different operation modes for different wind strength, and the input and output of wind power generator are different correspondingly. The authors analyze working characteristics of wind power generator in different working-zones and obtain the relation between power output and wind speed in different working zones of wind power generator, then the simulation method for different working zones of wind power generator is given, in which the induction generator is controlled by fuzzy direct torque control （DTC） and the output characteristic of wind power generator under different conditions can be simulated. Simulation results show that the proposed method can overall and accurately simulate working characteristic within whole wind power generation process.