线性自抗扰控制技术在PWM整流器中的应用  

Application of Linear Active Disturbance Rejection Control Technology in PWM Rectifier

作　　者：曾岳南[1] 郑雷[1] 周斌[1] 林厚健 

机构地区：[1]广东工业大学自动化学院,广东广州510006

出　　处：《电力电子技术》2016年第8期13-15,共3页Power Electronics

摘　　要：传统脉宽调制(PWM)整流器电压外环控制多采用比例积分(PI)调节器,但负载发生突变或直流侧给定电压突变时,PI控制存在延时、易出现积分饱和,系统动态性能较差。研究了一种基于线性自抗扰控制(LADRC)技术的控制策略并给出具体的设计方法。建立PWM整流器在同步旋转坐标系下的数学模型,采用电压外环和电流内环的双闭环控制方案,电流环采用基于前馈解耦的PI控制,电压环采用LADRC,提高了系统的响应速度和控制精度,增强了系统的抗扰性能。仿真和实验结果验证了该控制方案的可行性和正确性。Proportional integral （PI） regulator has been widely applied in traditional outer voltage loop control ot pulse width modulation （PWM） converters ,but the system dynamic performance is poor when the load or the reference val- ue of DC side is mutated because of the control delays and integral saturation of PI controllers.This study presents a new control strategy of PWM rectifier based on linear active disturbance rejection control （LADRC） and analyses the design method of the control strategy.Establish the mathematical model of PWM rectifier in synchronous rotating coor- dinate system and employ dual loop control scheme including outer voltage loop and inner current loop, where PI co- ntroller is used in the current loop and the LADRC is applied in the voltage loop.The presented method can improve the response speed and control accuracy of the system as well as enhance the immunity system performance.The fea- sibility and correctness of this control strategy has been verified through simulation and experimental results.

关 键 词：整流器 矢量控制 线性自抗扰控制 

分 类 号：TM461[电气工程—电器]