中文摘要：

以液压型风力发电机组为研究对象，在介绍液压型风力发电机组的工作原理与工作条件的基础上，提出一种比例流量阀与变量马达摆角双变量联合控制的新型转速控制方法。通过建立机组数学模型，利用反馈线性化方法解决系统非线性问题，构造双变量跟踪控制器，实现机组在风速波动与发电机端负载扰动下顺利并网，最后利用Matlab／Simulink仿真验证控制策略的可行性。

英文摘要：

Taking the hydranulic type wind turbine as the subject, this paper puts forward a new double variables speed control method after intorducing the working principle and conditions of the system, that is the speed is jointly controlled by proportional flow valve and swing angle of the variable displacement motor. The mathematical model of the system was established based on which the nonlinear problem was solved by feedback linearization method and then the doublevariable speed tracking controller was constructed to guarantee the steady speed control and realize the grid connection even though in the interferences of both wind speed fluctuation and generator load disturbance. Finally the cntrol stategy is verified by simulation in Matlab/Simulink.