三电平PWM整流器双闭环控制系统的研究

Research on Dual Close-loop Control System of Three-level PWM Rectifier

基于三电平PWM整流器的数学模型,建立dq旋转坐标系中的解耦状态方程。为了实现有功和无功的结构,运用前馈解耦方案。同时,双闭环控制系统能够实现输入侧近似单位功率因数及直流母线电压稳定。最后,为实现三电平PWM整流器双闭环控制系统,本文设计一套硬件实验装置并且可在DSP下编写控制软件。

Based on the math model of three-level rectifier, build decoupling equations in d-q rotational reference frame. In order to achieve active and reactive power, feed forward decoupling method is be used. At the same time, it can achieve unity power factor and steady DC voltage by adopting dual close-loop control strategy. Finally, in order to build three-level rectifier close loop control system, in this paper, author design hardware equipment that can program code as control software under DSP.