Research of Three phase Shunt Active Power Filter Based on Fuzzy-Sliding Variable Structure Control

Abstract

In order to suppress harmonics and lower power factor due to the widely-used nonlinear load, and on the basis of mathematical model of shunt three-phase active power filter, a kind of shunt three-phase active power filter based on fuzzysliding mode variable structure control strategy is designed. This control strategy combines the sliding mode variable structure control and fuzzy control with reaching law. Application of this method is able to eliminate high frequency flicker caused by the sliding model variable structure control method, as well as make system have strong robustness against model uncertainties and external disturbance, furthermore, it is able to improve the character of reaching segment and to make the tracking errors converge to a neighborhood of zero. This control method is verified by simulation experiment, and the simulation results show that the control method is feasible and the system has good dynamic and static properties.

Sliding mode and variable structure filters for signal processing: a literature review

“…As in signal processing, where the paramount of crucial and groundbreaking discoveries revolves around rudimentary issues of filtering techniques in the context of noisy and conflicting systems, the effective methodologies aiming at achieving the desired accuracy and precision are what is put in the spotlight . Aside many applications of filter , the sliding mode and variable structure filters are regarded as the vital implementations that provide the integration of certain qualities such as precision [52][53][54][55][56][57][58][59][60][61][62][63][64][65][66][67][68], flexibility [69][70][71][72], and robustness [73][74][75][76]. These methodologies have indeed become a venerable issue in the practice of the improvement of accuracy and reliability through signal processing systems which have usually been faced with a major challenge of non-linearities and disturbances that have made linear filtering ineffective [77][78][79][80][81][82][83][84][85][86][87][88][89][90][91][92][93]…”