三相PWM整流器建模控制与实现

传统的三相电压型PWM整流器数学模型为一非线性系统,不利于补偿控制设计。通过建立输入输出能量关系,选择新的状态变量,即将输出直流电压的平方量作为状态变量,得到了d,q旋转坐标系下的三相电压型PWM整流器线性化模型。所得的线性化模型不再依赖于某个静态工作点,使得变换器的补偿设计变得简单。同时提出了变换器的控制方案,并通过实验样机验证了该线性化模型的有效性。

Mathmatical Modeling and Control of Three-phase PWM Rectifier

Due to the nonlinear characteristic of the mathmatical model of traditional three-phase PWM rectifier system,it is difficult to design the controlling of the converter.A novel linear model of three-phase PWM rectifier is proposed which is in d,q rotating reference frame by involving the power equation between input and output side,and chosing the squre vaule of output voltage as a new state variable.This linear model is independent of the static operation point,which makes the design of the controller easy.Also,the control strategy of the converter is proposed,and the performance of the linear model is verified by the experiment.