Adaptive fuzzy sliding control with fuzzy sliding term for three-phase active power filter

Abstract

In this paper, an adaptive fuzzy-sliding control system is proposed to improve dynamic performance of three-phase active power filter (APF). The adaptive fuzzy systems are employed to approximate both the equivalent control term and the switching control term in the sliding mode controller. An on-line adaptive tuning algorithm for the consequent parameters in the fuzzy rules is also designed. The switching control becomes continuous and the chattering phenomena can be attenuated. Simulation demonstrated that the proposed control method has an excellent dynamic performance such as small current tracking error , reduced total harmonic distortion (THD), strong robustness in the presence of parameters variation and nonlinear load.