PCC Voltage Quality Restoration Strategy of an Isolated Microgrid Based on Adjustable Step Adaptive Control

The sustainability and reliability of supply are the prime area of focus especially when the generation from renewable energy sources is considered. The power generation from solar and wind, along with the energy source is considered in the autonomous and grid isolated microgrid. This paper introduces a new control strategy for enhancing the voltage profile at the point of common coupling. The adjustable step continuous norm adaptive control strategy filters the constituent of load current, providing enhanced power quality and assurance of system reliability in feeding sensitive loads. The intelligently controlled proportional integral (PI) controller enhances the speed regulation of synchronous generator whereas the enhanced perturb and observe provides the effective extraction of wind maximum power point (MPP). The load side power converter regulates the DC link voltage and the boost converter allows the extraction of solar MPP. The battery backs up the power, moreover, it promotes the overall performance of the microgrid. It provides the required power based on fluctuating load demand. The test setup developed in the laboratory confirms the effective microgrid performance in the presence of load alterations and renewable intermittency.