A Novel Fuzzy Based Control Strategy For Three Phase Inverter In On Site Generation System

Abstract

This paper presents a fuzzy based three-phase inverter in distributed generation which can be implemented for both islanded and grid-tied operations. With no need for switching between two Corresponding controllers or critical islanding detection. In the proposed strategy the three-phase inverter is regulated as just current source by inner inductor current loop in grid-tied and for islanding mode a voltage loop in the synchronous reference frame will automatically regulates the load voltage. This paper proposes a unified load current feed forward to maintain the grid current waveforms in grid-tied mode and load voltage waveforms in islanding mode to be undistorted even under nonlinear local load. The effectiveness of the proposed strategy is validated by the simulation.