Performance Comparison of PID & FOPID for Solar PV & Wind Power Grid Integration

Abstract

his paper presents performance analysis of grid connected solar photovoltaic (PV) and wind power plants with an aim to analyze the stability of system. The work evaluates the performance of Proportional-Integral-Derivative (PID) and Fractional Order PID (FOPID) controllers by utilizing three different algorithms like: Firefly (FF), Whale Optimization Algorithm (WOA), and Path Finder (PF). These techniques are used for optimal tuning of controller parameters such as: Kp​, Ki​, Kd​, ???? and ????. The performance of each technique is tested under three different cases depending on solar irradiance and wind speed. In Case I, Solar Irradiance is 850 W/m² & Wind Speed is 15 ms, in Case II, Solar Irradiance is 900 W/m² & Wind Speed is 10 ms and in Case III, output is analyzed at Solar Irradiance of 1000 W/m² and Wind Speed is 15 ms. There is performance comparison on DC link voltage and output voltage of proposed system on their responses to critically assess the efficacy in optimizing power generation with stable grid operation. The results proved the superiority of FOPID controllers as compared to PID controllers in terms of stability and settling time. Further, WOA-FOPID offers a shortest settling time of 0.28 seconds amongst all FOPID controllers for the case