基于前馈解耦控制的电压型PWM整流器可逆运行研究

研究了一种基于前馈解耦的电压型PWM整流器系统双向运行控制策略，使整流器在整流以及有源逆变状态下都能实现高功率因数运行。建立了两相旋转坐标系下整流器的低频数学模型；在分析整流器能量双向流动的基础上给出了控制方法，采用电压外环与电流内环的双闭环结构，由电压外环控制功率的流向与大小；通过前馈解耦，对d轴电流与q轴电流独立控制，并给出了电压凋节器与电流调节器的设计方法，使系统在整流与逆变状态下都能达到较高的动静态性能；最后给出了仿真实验验证结果。

Research on Reversibly Running of a Voltage Source PWM Rectifier Based on Feed forward Decouple Control

The control strategy of bi-direction operation of three-phase PWM rectifier system based on feedforward decoupling control is studied. The system is capable of running on high power factor no matter in rectifier mode or inverter mode. Low frequency model of the rectifier is built in the two-phase rotational reference frame. The control method is proposed based on the analysis of power energy flow in the two operational modes. Dual-close-loop control strategy is used with current inner loop and voltage outer loop which controls the direction and value of the power flow. The independent control of d-axis current and q-axis current is obtained through the feedforward decoupling method. The current and voltage regulation design principle is presented to make sure that both static and dynamic performance can be achieved as expected. Simulation experiment results are given to verify the proposed analysis and design at the end of the paper.