Source Current Harmonics Reduction with Intelligent controlled Multiple RES based SAPF

Abstract

In recent years, the number and variety of applications of Hybrid Fuzzy Logic (HFL) have increased significantly. Among the Renewable energy resources most abundantly available throughout the earth is Sun radiation. This paper presents a novel control strategy for achieving maximum benefits from these grid-interfacing inverters when installed in 3-phase 4-wire distribution systems. The inverter is controlled to perform as a multi-function device by incorporating active power filter functionality. The inverter can thus be utilized as: 1) power converter to inject power generated from RES to the grid, and 2) shunt APF to compensate current unbalance, load current harmonics, load reactive power demand and load neutral current. All of these functions may be accomplished either individually or simultaneously. This new intelligent (HFLC) controller based concept is demonstrated with extensive MATLAB/Simulink simulation studies.
Keywords: Hybrid FLC; Active power filter; current control; four-leg converters; predictive control.