Robust switched fractional controller for performance improvement of single phase active power filter under unbalanced conditions  

作　　者：H. AFGHOUL F. KRIM D. CHIKOUCHE A. BEDDAR 

机构地区：[1]LASS Laboratory, Electronics Department, Technology faculty, University Mohamed Boudiaf of M'sila, BP.166, Route Ichebilia, M'sila28000, Algeria [2]LEPCI Laboratory, Electronics Department, University of Ferhat AbbasSetif-1, route de B6jaia, Setif 19000, Algeria [3]Department of Electrical Engineering, Technology faculty, SkikdaUniversity, Skikda 21000, Algeria

出　　处：《Frontiers in Energy》2016年第2期203-212,共10页能源前沿（英文版）

摘　　要：A novel controller is proposed to regulate the DC-link voltage of a single phase active power filter （SPAPF）. The proposed switched fractional controller （SFC） consists of a conventional PI controller, a fractional order PI （FO-PI） controller and a decision maker that switches between them. Commonly, the conventional PI controller is used in regulation loops due to its advantages in steady-state but it is limited in transient state. On the other hand, the FO-PI controller overcomes these draw- backs but it causes dramatic degradation in control performances in steady-state because of the fractional calculus theory and the approximation method used to implement this kind of controller. Thus, the purpose of this paper is to switch to the PI controller in steady-state to obtain the best power quality and to switch to the FO-PI controller when external disturbances are detected to guarantee a fast transient state. To investigate the efficiency and accuracy of the SFC considering all robustness tests, an experimental setup has been established. The results of the SFC fulfill the requirements, confirm its high performances in steady and transient states and demon- strate its feasibility and effectiveness. The experiment results have satisfied the limit specified by the IEEE harmonic standard 519.A novel controller is proposed to regulate the DC-link voltage of a single phase active power filter （SPAPF）. The proposed switched fractional controller （SFC） consists of a conventional PI controller, a fractional order PI （FO-PI） controller and a decision maker that switches between them. Commonly, the conventional PI controller is used in regulation loops due to its advantages in steady-state but it is limited in transient state. On the other hand, the FO-PI controller overcomes these draw- backs but it causes dramatic degradation in control performances in steady-state because of the fractional calculus theory and the approximation method used to implement this kind of controller. Thus, the purpose of this paper is to switch to the PI controller in steady-state to obtain the best power quality and to switch to the FO-PI controller when external disturbances are detected to guarantee a fast transient state. To investigate the efficiency and accuracy of the SFC considering all robustness tests, an experimental setup has been established. The results of the SFC fulfill the requirements, confirm its high performances in steady and transient states and demon- strate its feasibility and effectiveness. The experiment results have satisfied the limit specified by the IEEE harmonic standard 519.

关 键 词：conventional PI controller fractional calculus（FC） total harmonic distortion （THD） Oustaloup contin-uous approximation （OCA） single phase active power filter（SPAPF） 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置] TN713.8[自动化与计算机技术—控制科学与工程]