الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
The thesis introduces an introduction of a stand alone photovoltaic system (SAPS). First : A complete design of solar cells array (SCA) supplying a specific load is completely introduced. The used method is based upon the experimental testing of the arrays under study. Second : To design an accurate controller for charging and discharging process of the lead acid battery (which is used as energy storage element with PVPS), the electrical behavior of the battery must be investigated. from the experimental behavior, the set points for charging and discharging process of the battery are determined. Third : Discharge and charge controllers are completely designed for sensing the previous set points. The designed controllers for the discharge process are composed of three main circuits. These circuits are completely designed. The charging controller circuits (triggering, interface and power switch) are also designed for sensing overcharge set point. Fourth : The theoretical and experimental investigation of DC chopper operation at different duty cycles and frequencies are introduced (established). Hence, DC chopper under investigation supplies lead acid battery of 12 V, 55 Ah connected with a small resistor and inductor of 1 (S] (Band 1 mH respectively. The resistor and the inductor are connected with the battery for obtaining two different modes of DC chopper output current. The full charge battery time Tf depends upon the current mode. A mathematical model is obtained to determine the battery full charging time as a function of duty cycle and frequency of the DC chopper. An actual setup for the system is built in the laboratory. Two different triggering circuits are designed and tested for obtaining variably duty cycle as well as frequency.