Power quality enhancement in autonomous PV system using fuzzy logic controller

This work imparts a control strategy for stand-alone photovoltaic (PV) system by means of fuzzy logic controller (FLC). The objective for this endeavor is to manage the power quality supplied from a PV system mainly in the course of load variation. The controller scheme is consist from voltage-frequency (Vf) control strategy based on a synchronous reference frame and the FLC. The FLC is an intelligent controller that is utilized to develop the power control parameters. To control the voltage, as well as the frequency of the three-phase voltage source inverter (VSI), seven gbell membership functions are implemented for the inputs as well as for the output. The results show that the controller was successful in delivering peak voltage of 339V. Furthermore, total harmonic distortion of the voltage waveform fulfilled the international standard, found to be 3.58%. The outcomes also indicated that the suggested controller have a superior response to fulfill the power quality requirements and show the robustness of the suggested control strategy.