Asymmetrical fuzzy logic control to PV module connected micro-grid

Abstract

This paper proposes asymmetrical fuzzy logic control (AFLC) for PV module connected micro grid. PV module connected micro grid is considered as two stages control, (i) maximum power point tracking control, and (ii) three phase PWM voltage source control. Voltage source converter (VSC) is used for interfacing solar energy with the micro grid and the dc link voltage is regulated using conventional and intelligent controller. During load change transients, there is considerable variation in dc link voltage in case of conventional controller whereas with asymmetrical fuzzy logic control, transient performance is improved considerably. The system has been modelled and implemented in MATLAB Simpower Simulink. Simulation results are presented and analyzed to validate the proposed simulation model.