高功率因数PWM整流器PI调节器的仿真研究

Simulation of PI Adjustor of High Power Factor PWM Rectifier

对单相PWM整流器进行了分析,推导出了相应的数学模型和控制结构框图。针对单相PWM整流器建模难和电流、电压控制环的PI调节器设计难的问题,提出了一种基于古典线性控制对非线性进行线性化和输入输出能量守恒相结合的单相PWM整流器的PI调节器的设计方法。分别对电流、电压控制环的调节器进行了选型和参数设计。采用基于Matlab/ SimPower Systems的方法对整个控制系统进行建模和仿真验证。仿真结果得出双闭环PJ调节器均能很好的满足控制系统的稳定性和动态性要求。因此,文中提出的单相PWM整流器PI调节器的设计方法在工业控制中有推广应用的广阔前景。

In this paper, the corresponding mathematic model and controllable structural chart are derived when the single - phase PWM rectifier is analyzed. A design method based on the combination of in - out conversation of energy and non - linear control system linearized by classical linear control for PI adjustor of single - phase PWM rectifier is brought forward to deal with the problem of PWM rectifier modeling and PI adjustors design of the current and voltage control loops. The adjustors of the current loop and the voltage loop are respectively chosen and their parameters are designed. Adopting the method based on the Matlab/Power System Blockse to carry out modeling and simulation for the whole system. The result educes that both the PI adjustors can well satisfy the steady and dynamic demands of the system. Hence ,the design method of the PI adjustor of single -phase PWM rectifier put forward in this paper has wide foreground for spreading application in the industry control.