3MW风电机组变桨距无模型控制

Model-Free Pitch Control for 3MW Wind Turbine

随着风电机组装机容量的迅速增加,电网对风电机组的电能品质提出了更高的要求,而功率波动是影响风电机组电能品质的一个重要问题。考虑到风电机组变桨控制中的桨距角和机组功率的非线性关系和外界扰动问题,为了减小风电机组功率波动,基于无模型自适应(MFA)控制理论设计了风电机组变桨无模型控制器,不依赖于风电机组精确的数学模型。为了验证无模型变桨控制器的性能,以3MW双馈风电机组为控制对象在Sinmulink中对该算法进行了仿真并和广泛应用的PID变桨控制器进行了对比。仿真结果表明无模型变桨控制器较好地解决了风电机组变桨控制中的非线性和外界扰动问题,风电机组输出的功率波动明显小于PID控制器。

With the rapid increasing of installed wind turbine capacity, higher requirements for wind turbine power quality were put forward by grid companies. Power fluctuation is an important issue for wind turbine power quality. In order to reduce the power fluctuations of the wind turbine, a kind of model-free pitch controller was designed considering nonlinear factor and disturbances in the wind turbine blade pitch control. The model-free controller was based on adaptive control theory and didn＇t depend on the precise mathematical model of the wind turbine. In order to validate the model pitch controller performance, the algorithm simulation was made in Sinmulink for the 3MW doubly-fed wind turbine control and compared with the PID pitch controller. The results verified the effectivity and priority of the MFA control.