摘要
为了克服传统无差拍控制和基于两拍采样的预测电流控制方法在控制延时情况下稳定裕度低、鲁棒性差等缺点,提出基于Luenberger观测器的鲁棒预测电流控制器设计方法,该方法有效补偿电流跟踪的时滞效应,显著地改善电流环的高频特性,提高控制精度、改善系统的稳定裕度和鲁棒性。动模实验表明,链式APF对于各种非线性负载均具有良好的补偿精度和动态响应速度,能够实现各H桥直流母线电压自均衡控制。
In order to overcome the shortcomings of the poor stability margins and robustness of the conventional deadbeat controller and two-sample predictive current controller under control delay,the design scheme of an effective robust predictive current controller is proposed based on the Luenberger observer,which compensates the effect of control delay,thus enhancing high frequency characteristics of current loop,and improving control accuracy,stability margin and robustness of the system.The experimental results reveal that the cascaded H-bridge APF provides effective compensation for different kinds of harmonic load with high precision and fast dynamic response,while realizing self-equalization control of the individual DC-link voltage of each H-bridge..
作者
李丽华
徐琳
Li Lihua;Xu Lin(College of Jincheng,Sichuan University,Chengdu 611731,China;Electric Power Research Institute of State Grid Sichuan Electric Power Company,Chengdu 610091,China)
出处
《电测与仪表》
北大核心
2019年第20期130-136,共7页
Electrical Measurement & Instrumentation
关键词
级联H桥APF
鲁棒预测电流控制器
谐波补偿
cascaded H-bridge APF
robust predictive current controller
harmonic compensation
