摘要
针对三相电压型PWM整流器的双闭环控制系统直流母线电压超调较大、对扰动克服能力不强、鲁棒性差等问题,本文对控制系统进行了改进,在电压外环设计一种基于内模原理的控制器以取代传统PI控制器,并对内模控制器中滤波器部分的参数设计进行分析,最后使用MATLAB/SIMULINK进行仿真研究,并与电压外环采用PI控制器的系统性能进行比较。仿真结果表明,在电压环采用内模控制器,可以有效降低直流母线电压超调,快速抑制扰动,具有良好的鲁棒性,性能优于传统PI调节器。
With the problems of large vohage overshoot of DC bus, poor capability of restraining the disturbance and weak robust in three-phase voltage PWM rectifier double-loop control system, this paper designed a control system based on IMC controller instead of the traditional PI controller in voltage loop, and analyzed the parameters design of the filter which is a part of the IMC controller. Finally conducted the simulation with the tool of MATLAB/SIMULINK, and compared the performance with the system used PI controller. The simulation results illustrated the IMC controller in voltage loop could effectively reduce the voltage over- shoot of DC bus, rapidly restrain disturbance, and have good robust. Its performance is better than the PI controller.
出处
《电子技术应用》
北大核心
2009年第8期76-78,共3页
Application of Electronic Technique
基金
国家"211工程"资助项目(010301)
