改进最佳转矩法的风力机MPPT控制

Improved optimal torque method for wind turbine MPPT control

随着风力机向着大型化和高参数化的发展,对于风力发电质量的要求越来越高,所以风力机的功率控制显得尤为重要。为了提高风力机组在低风速区对于最大功率点的动态跟踪性能,提出了一种将最佳转矩法与有限时间指令滤波反步法结合的控制方法。在MATLAB/Simulink平台搭建风力发电系统模型,以功率系数、叶尖速比、发电机转矩、风轮角速度作为评价指标来评估所提方法的可行性和有效性。经过仿真实验表明,所提方法有效改善了传统最佳转矩法风能转换效率不高、实时跟踪风能性能较差以及发动机转矩波动变化太大的缺点。

With the development of large-scale and high-parameter wind turbines,the requirements for the quality of wind power generation are getting higher and higher.The power control of wind turbines becomes particularly important.In order to improve the dynamic tracking performance of the wind turbine at the maximum power point in the low wind speed area,a combination of the optimal torque method and the finite time command filter backstepping method is proposed.A wind power generation system model was built on the Matlab/Simulink platform,and the feasibility and effectiveness of the proposed method were evaluated using power coefficient,blade tip speed ratio,generator torque,and wind turbine angular velocity as evaluation indicators.Simulation experiments show that the proposed method effectively improves the weakness of low wind energy conversion efficiency of the traditional best torque method,poor performance of real-time tracking of wind energy,and large changes in engine torque fluctuations.