单周控制变速恒频风力发电机并网仿真研究

双馈式风力发电机的变速恒频控制是风力发电系统研究中的热点。在空间矢量控制的基础上．结合异步电机的变速恒频控制理论，通过单周控制技术产SVPWM波形，对Ac—DC／DC—Ac变频器进行控制，快速跟踪调节转差频率，实现定子输出电压频率同步电网频率，实现转子功率双向流动。在Matlab／Simulink环境下建立双馈式感应电机、变频器、转子频率控制器的双馈式风力发电机仿真模块并进行仿真研究。证明单周控制器能很好地实现双馈式风力发电机的变速恒频运行。

Grid Connection Simulation of VSCF Wind Power Generator with One-cycle Control

VSCF control of double-fed wind turbine is a hot research in wind power system. Based on space vector control and combined with variable speed constant frequency control theory of asynchronous induction motor, this paper introduces a method that generates SVPWM waveform to control AC-DC/DC-AC inverter using one-cycle control technique, quickly adjusts and traces the slip frequency to synchronize the stator w）hage frequency with grid frequency, and makes the power of rotor can bidirectional flow. The paper establishes the simulation module of the double-fed wind turbine, inverter and rotor frequency controller simulating the double- t~d wind power generator system in the Matlab/Simulink environment. The results show that the double-fed wind turbine VSCF control can be well realized by using the one-cycle controller.