Simulation research of discrete sliding mode control for active power filter  

作　　者：WANG Yu-feng SUN Bao YANG Zhen LI Jian 

机构地区：[1]Faculty of Electrical and Control Engineering, Liaoning Technical University, Huludao 125105, China

出　　处：《Journal of Coal Science & Engineering(China)》2011年第4期461-463,共3页煤炭学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China （50375026, 50375028）

摘　　要：Because of the widely-used nonlinear loads, the problems of harmonics and low power factor in power systems are becoming more and more serious. In view of the above problems, a shunt three-phase active power filter （SAPF） based on discrete sliding mode control to suppress the harmonics was designed and the power factor improved. First, built the mathematical model of SAPF. Then, controlled the switch through analyzing the harmonic current that was controlled signal using discrete sliding mode control. Through simulation using MATLAB, verified the validity of the algorithm. By the simulation waveforms, it can be found that after the load current containing a large number of harmonics passes the active power filter, the waveform of the power current approximately becomes a sine wave and the harmonics is significantly reduced. As a result, it plays a good role in purifying power systems. Moreover, from the waveforms of harmonic current and power current, it can be found that the algorithm has a faster tracking speed. The waveform can fect.

关 键 词：discrete sliding mode control be stably tracked in the half cycle and real-time if the algorithm is perpower electronics shunt active power filter 

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