Design and development of photovoltaic power automatic system

In this paper the design, building and test of the photovoltaic power automatic system prototype is reported, the electronic system is developed using the capacitive technique to reduce the power loss of the photovoltaic module. The property of variable resistance reflected by the capacitor during its discharge–charge process is toke in advantage to sweep the module I-V curve wile module current and voltage are sensed. An electronic system is designed using a microcontroller target to get the digital voltage signal and. Also, a personal computer is used to automatize the measurement. So that, a software base on Mat Lab was designed and developed to operate the electronic system since the computer. Experimental results gotten since the prototype electronic developed, the I-V and P-V curves can be measured for different modules until 60 V and 8 A, the efficiency is about 98%. The system simple and cheaper and it can be manufactured easily.