论文部分内容阅读
风力发电系统中的转速传感器常常会带来一些不利的影响。文中介绍了一种双馈风力发电机的无速度传感器的控制方法,利用风电机组转动惯量大,速度变化慢的特点,通过测量转子的感应电动势,控制转子侧变流器给转子注入相应频率与相位的电流,从而控制电机的转矩与无功。文中推导了电机的控制方程式,给出了控制框图。通过仿真与实验,验证了该方法可以用于双馈风力发电机的控制。
Speed sensors in wind power systems often have some negative effects. In this paper, a speed sensorless control method for a doubly-fed wind turbine is introduced. By using the characteristics of large rotating inertia and slow speed variation of the wind turbine generator, the induced voltage of the rotor is measured to control the rotor-side converter to inject the corresponding frequency and Phase current, thereby controlling the motor torque and reactive power. In this paper, the control equations of the motor are derived and the control block diagram is given. Through simulation and experiment, it is verified that this method can be used in doubly-fed wind turbine control.