Fuzzy Logic Based-SVPWM Current Controller for Inverter-Interfaced Distributed Generation System

The market penetration of the distributed generation (DG) is anticipated to increase radically due to global energy crisis. To meet the future energy demand, DGs are one of the viable options, but the complexity is to integrate DGs with the utility grid. The synchronization is needed in order to ensure 1) the grid stability 2) the injection of high quality power to the utility grid and 3) high efficiency etc. For that, pulse width modulated voltage source inverter (PWM-VSI) is used to interface the DGs with the utility grid. However, the inverter performance is largely depends on the applied current control strategy. In this paper for current control of the PWM-VSI, fuzzy logic based SVPWM technique is employed due to its fast dynamic response and better Dc-link voltage utilization. Further in this paper an effort has been made to design the current error compensation scheme by using fuzzy logic controller in order to improve the overall performance of grid connected inverter system. The studied system is modeled and simulated in the MATLAB/Simulink environment.