基于全程滑模变结构控制的有源电力滤波器

Global Sliding Mode Variable Structure Control for Active Power Filter

有源电力滤波器(APF)在工程应用中易受自身参数变化和外界扰动的影响,提出了一种基于全程滑模变结构控制的有源电力滤波器控制策略。在对APF状态空间描述的基础上,设计了适用于APF的全程滑模变结构控制方法。对APF分别采用定常滑模变结构和全程滑模变结构控制方法进行仿真,仿真结果表明全程滑模变结构控制方法能有效地缩短系统状态到达滑动模态的时间,具有更强的抗元件参数变化和抗外界干扰能力,鲁棒性强,同时响应快速,控制性能优于定常滑模变结构控制方法。

A novel global sliding mode variable structure control（GSMVSC）for active power filter（APF）wasproposed to weaken the influence of APF parameters perturbation and exogenous disturbance. This appropriate controlstrategy based on APF′s mathematic model was designed. The Matlab simulation of GSMVSC and constant slidingmode variable structure control（CSMVSC）shows that GSMVSC can efficiently shorten the time from the initial statesto the sliding mode surface,and weaken the influence of APF self-parameters perturbation and exogenous disturbance.The GSMVSC regulator improves transient performance of APF and it is more robust than CSMVSC regulator.