基于内模控制的三电平PWM整流器控制方法  

Control Strategy of Three-level PWM Rectifier Based on Internal Model Control

作　　者：董英[1] 宋文祥[1] 尹赟[1] 曹大鹏[1] 

机构地区：[1]上海大学机电工程与自动化学院,上海200072

出　　处：《电气传动》2012年第2期44-47,共4页Electric Drive

摘　　要：根据二极管钳位式三电平PWM整流器的电路结构,建立了在dq坐标系的解耦状态空间方程。当系统参数与模型参数不完全匹配时,传统的双闭环调节方法可能会出现解耦失败。为了实现可靠的解耦控制,将内模控制原理应用于三电平PWM整流器电流内环控制中,用内模控制器代替传统的电流PI调节器,并在Matlab/Simulink中进行了大量仿真实验。仿真结果表明,内模控制器能使系统获得优良的动静态性能,而且设计方法简单,参数调节方便。According to the topology of diode-clamped three-level rectifier, the decoupled state-space equations in synchronous rotating reference frame（d -q frame） were derived. The conventional two-closed-loop control method may fail to decouple when the system parameters and the model parameters are not completely matched. In order to realize realiable decoupling,the IMC method was brought into the inner-current loop con- trol of PWM rectifier instead of conventional PI controller and this stategy was simulated using Matlab/Simu- link. Simulation results demonstrate that the proposed IMC controller provides excellent performance both in steady-state and dynamic load variations. Besides, the design method is simple and easy to regulate.

关 键 词：三电平PWM整流器 内模控制 d—q解耦 

分 类 号：TM461[电气工程—电器]