三相电压型PWM整流器精确线性化和滑模控制研究

建立了同步旋转坐标系下的三相电压型PWM整流器(VSR)的非线性数学模型，针对有功电流和无功电流强耦合的特点，提出一种基于该坐标系下的电压和电流双闭环控制算法，其中电压外环采用滑模控制算法，电流内环采用状态反馈精确线性化控制策略，最后建立了仿真模型并与传统PI控制进行了对比仿真，结果表明，该复合控制方案结合了两者的优点，使VSR既具有变结构控制良好的鲁棒性，又能实现无功电流和有功电流的解耦控制，系统能保证很高的功率因数，输出电压恒定，能适应负载的扰动和非线性变化，具有很好的静动态性能。

The Research Of Feedback Linearization Control Method And Sliding-mode Control Method Of Three-Phase Voltage Source PWM Rectifier

A nonlinear mathematical model of three-phase voltage source PWM rectifier was established in the rotating frame dq. Aiming at the highly coupled of the active and reactive current of three-phase PWM rectifier, a control system with double close-loops of voltage and current is proposed based on the synchronous rotating reference frame. A sliding-mode control algorithm for the out-voltage-loop was proposed, and the accurate state-feedback linearization method was designed for the current loop. The whole system was modeled and simulated between compound control and classical double PI control. The results show that the former integrates advantages of sliding mode control and the feedback linearization method. The whole system has good robustness, and this control scheme can realize decoupled control of the three phase PWM rectifiers. The power factor of the system is close to 1.The PWM rectifier has constant output voltage ,and it can hold to disturbance or nonlinear variety of load. Furhtermore, good dynamic and static performance is indicated in the system.