Charging and Discharging of Battery in a PV System using Fuzzy Logic Controller

Microgrids are the major component of the future smart grid, as these open up new possibilities for aggregating loads and sources. As a result, it is considered to be the next-generation power system arrangement, capable of operating in both standalone and grid-connected modes. This work describes a novel fuzzy logic controller for controlling the charging and discharging of a PV battery storage system. The battery is charged and discharged based on the power difference between generation and demand. There are numerous strategies for controlling the performance of battery, however these controlling techniques have issues in terms of limiting overcharging, complexity in control and slow charging. The paper compares the performance of battery, simulated in MATLAB Simulink using PID controller and fuzzy logic controller. A fuzzy logic controller is less complex to design and provides fast charging.