三相电压型PWM整流器的级联式非线性PI控制

该文以同步旋转坐标系模型为基础，设计了三相电压型PWM整流器的级联式非线性PI控制器。采用双环结构，用三个非线性PI环节实现了对整流器直流电压与功率因数的高性能控制。以误差的非线性函数与传统PI环节构成的级联式控制器，既提高了系统响应的快速性，又增强了抗扰能力，同时计算简单易于实现。与传统PI控制器的仿真对比表明该方法能够明显改善系统的动态性能，而实验结果也验证了非线性PI控制器的优良性能。

The Cascaded Nonlinear PI Control for Three-Phase Votagle Source PWM Rectifier

This paper proposes a cascaded nonlinear PI controller for three-phase voltage source PWM rectifier, which is based on its model in synchronous reference frame. The DC bus voltage and the power factor of the PWM rectifier are regulated by three nonlinear PI controllers with high performance. The cascaded nonlinear controller, consisting of the nonlinear function of the error and the traditional PI regulator, improves the dynamic response as well as the robustness of the system. This controller is also easy to be realized. Compared with the traditional PI controllers, the simulation results show that this method can improve the dynamic performance of the system obviously. The experimental results demonstrate the effectiveness of the proposed control algorithm.