Design, Modeling and Simulation of P&O Algorithm with Fuzzy Logic Controller for Photovoltaic Water Pumping System

Abstract

In this thesis work an inquiry into the design of stand-alone Photovoltaic water pumping system controller has been taken into account for supplying a rural area with clean water. It comprises a study of system components and their modeling. Theoretical studies and mathematical modeling techniques of Photovoltaic are undertaken by using equivalent electrical circuits, various tracking algorithms and their control methods are involved in the discussion. The whole system is implemented in the MATLAB/SIMULINK to verify the performance of the planned MPPT technique. The complete system simulation is undertaken by analyzing and modeling each subsystem. It applies SIMULINK to model MPPT, FLC, Photovoltaic module, buck converter, a DC pump motor and the model is moved to MATLAB. Every of these elements have been masked and simulated in an individual subsystem in order that they can be simply controlled and exactly monitored. A model of the complete PV system is presented and discussed along with how all of the subsystem components have been combined to form it. The conventional P&O MPPT technique is changed to P&O with FLC. To verify the practicality of the proposed P&O with FLC MPPT and compare its performance against the conventional P&O algorithm, they are enforced in MATLAB and their simulation is done using existing irradiance data. The simulation result of the proposed P&O with FLC MPPT is compared to conventional P&O algorithm of water pumping system. Based on the simulation results, it is justified that the P&O with FLC has the ability to perturb the operation of the PV module at better approach to MPP compared to conventional P&O algorithm in varying weather and it improves the system performance. It is recommended to apply some other DC-DC converters such as boost, Ćuk and buck-boost along with the proposed MPPT technique to improve flexibility in the future research investigation in this area.