A Comparative Analysis of PID and Fuzzy Logic Controller in an Autonomous PV-FC Microgrid

In this work, the dependability and performance analysis of a typical hybrid micro-grid compiled with Photovoltaic (PV) arrays and Solid Oxide Fuel Cell (SOFC) is bestowed. The micro-grid system is designed to operate either in an islanding/autonomous mode to attain the load demand. The Fuzzy Logic Controller (FLC) based Voltage-frequency control (V/f) is applied to effectually control the micro-grid voltage and frequency; the easy flow of power can be achieved from generation to consumption. The voltage as well as the frequency of the proposed micro-grid is consistent even if there is a sudden load or power fluctuation. A dc-dc converter is used to connect the PV and the SOFC to the dc grid. Voltage Source Converter (VSC) helps to maintain the output voltage by enforcing the implementation of Maximum Power Point Tracking (MPPT) techniques by P & O algorithm. When the State of Charge (SOC) falls to its minimal limit, the rated power can be attained by a backup generator called SOFC. The propounded PV-SOFC hybrid micro-grid is critically investigated to scrutinize its performance improvisation by extensive simulation analysis. The system's improvement in power quality can be demonstrated with the help of results presented. A relative analysis is carried out to study the proposed system with conventional PID Controller is also presented.