MODELING AND CONTROL OF STAND-ALONE PV SYSTEM BASED ON FRACTIONAL-ORDER PID CONTROLLER

Abstract

Summary:

This thesis presents modeling and control of a standalone photovoltaic (PV) system in which a battery is used as a backup source for controlling power between the source and the load. Study of the propose Configuration for Design of stand-alone PV system to provide electricity for the purposes required. An efficient energy management scheme for stand-alone PV system is elaborated. The proposed fractional order (FO) PID and PI based energy management in battery control system; scheme comprises of two control loops namely inner and outer loops to outperform a standalone PV system with satisfactory response. The main task of the inner control loop is to extract and track maximum power from a standalone PV system. Moreover, the outer control loop is equipped with the battery for controlling the power between the source and the load smoothly. Various scenarios include sun irradiance variations and load fluctuations are presented to demonstrate the theoretical analysis, effectiveness, and feasibility of the proposed energy management strategy. Comparison between FOPID and PID control, optimization techniques is employed to fine tune the proposed control loops by generating their optimal settings. The simulation results discover the feasibility of the system. Using A software simulation model developed in Matlab/Simulink