1 A Novel GUI Modeled Fuzzy Logic Controller for a Solar Powered Energy Utilization Scheme

Abstract — solar powered electrical systems consist of different parts to be controlled separately. Since the generated power is a function of uncontrollable environmental conditions, it requires extra caution to design controllers that handle unpredictable events and maintain efficient load matching power. In this study, a photovoltaic (PV) solar array model is developed for Matlab/Simulink GUI environment and controlled using a fuzzy logic controller (FLC), which is also developed for GUI environment. The FLC is also used to control the DC load bus voltage at constant value as well as controlling the speed of a PMDC motor as one of the loads being fed. The FLC controller designed for Matlab/Simuling GUI environment has general design criteria’s so that it can easily be modified and extended for controlling different systems. The proposed FLC is used in three different parts of the PVA stand alone utilization scheme here. One of these parts is the speed control of the PMDC load, one of the other parts is controlling the DC load bus voltage, and the third part is the maximum power point (MPP) tracking control, which is used to operate the PVA at its available maximum power as the solar insulation and ambient temperature change. Index Terms — Photovoltaic power systems, Power generation