基于微分跟踪器的大型风电机组转矩优化控制

摘要

大型风电机组通常具有较大的转动惯量,因此在风速变化时机组转速不能快速跟踪最大功率点.为了提高风电机组在低风速区域对风能的利用率,设计了一个基于微分跟踪器的转矩优化控制系统,通过减小机组传动链等效转动惯量的方法来加快机组对最大功率点的跟踪速度.分析及仿真结果证明了所提出方法的正确性和可行性.%Large scale wind turbine normally has a great inertia moment which prevents the rotor from changing speed fast enough to follow the maximum power point when wind speed changes. In order to improve the efficiency of wind turbines in low winds, the optimization torque control system baaed on the tracking-differentiator was designed, which can enable the wind turbine to tack the maximum power point more quickly by means of decreasing the equivalent inertia moment of the rotor. Analysis and simulation results confirmed the validity and feasibility of the proposed method.