基于预测控制与H∞控制的有源电力滤波器设计  

Active Power Filter Design Based on Predictive Control and H∞ Control

作　　者：马兴[1] 刘会金[1] 崔雪[1] 郭晓云[1] 汪文达[1] 

机构地区：[1]武汉大学电气工程学院,武汉430072

出　　处：《电工技术学报》2016年第3期50-57,共8页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(51177112)

摘　　要：为了能更准确地分析有源电力滤波器(APF)系统,建立了考虑时滞、参数摄动以及死区干扰等的APF时滞不确定性模型,并设计了系统的时滞H∞鲁棒控制器。然而在该控制策略下,要保证系统鲁棒稳定性,就会严重降低干扰抑制能力,使APF系统的补偿效果受到影响。针对这一问题,采用嵌入预测控制的方法将APF的时滞不确定性模型转换为不含时滞的不确定性模型,采用H∞控制方法对标称系统设计控制器,以保证系统的整体稳定性,利用参数摄动造成的状态变量扰动是周期性的特性,采用PI控制与重复控制构成的复合控制策略消除参数摄动带来的影响。最后采用Matlab仿真及物理实验对其可靠性进行了验证。In order to analyze the active power filter （APF） system more accurately, a time-delay uncertainty model for APF is designed with the consideration of time-delay, parameter perturbation, and dead band. According to the model, the time-delay H ∞ robust control strategy is applied. It shows that the system robust stability and the interference suppression performance is contradictory which affects the compensation effect of the APF. So the predictive control is embedded to get the uncertainty new model of APF without time-delay and the controller is designed by H∞control strategy to ensure the stability of the whole system. Then, a compound control strategy containing the proportion-integral （PI） control strategy and the repetitive control strategy is used to eliminate the effects of parameter perturbation which causes periodic state variables＇ disturbance. Finally, Matlab simulation and physical experiments are carried out to verify the effectiveness and the correctness of the proposed method of this paper.

关 键 词：有源电力滤波器 时滞系统 预测控制 H∞控制 重复控制 

分 类 号：TM712[电气工程—电力系统及自动化]