双馈风电系统全风速下的功率控制策略

为了实现全风速条件下的功率调节,对双馈风力发电机组的功率控制策略进行了研究。额定风速以下采用基于叶尖速比的最大功率追踪控制,实现最大风能捕获;额定风速以上采用变桨距角控制,输出功率维持恒定,保证整个系统安全稳定地运行。利用MATLAB建模并进行了仿真,仿真结果表明：在较大的风速变化区间内,双馈风电机组能实现对输出功率的有效调节,两种功率控制策略切换时系统能保持较好的稳定性。

Power Control Schemes of Doubly-Fed Wind Power Generation System under Full Wind Speed Condition

Power control methods of doubly-fed wind power generation sets were researched in order to realize power adjustment under full wind speed condition. Maximum power point tracking control based on tip speed ratio was adapted under the rated wind speed and maximum wind energy capture was realized; variable pitch angle control method was applied to system above the rated wind speed and output power was kept constant to ensure whole system safe and stable operation. Simulation by MATLAB shows that the double-fed induct generator sets achieved effective adjustment of output power in a large wind speed variation section, and the system keep good stability when the two power adjustment methods switched.