中文说明：
双馈风力发电机是一个复杂的多变量非线性系统，利用Matlab软件中的S函数编程建立双馈风力发电机模型，并通过仿真验证了其正确性。
English Description：
Doubly fed wind turbine is a complex multivariable nonlinear system. The model of doubly fed wind turbine is established by using S-Function programming in MATLAB software, and its correctness is verified by simulation