DEVELOPMENT OF A PLATFORM TO TEST THE SOLAR PHOTOCELL UNDER THE INFLUENCE OF INCLINATION, TEMPERATURE AND HUMIDITY: USE OF EMBEDDED SYSTEMS

This work presents the development of an experimental platform of the solar photocell under the influence of inclination, humidity temperature with the use of embedded systems. This system consists of 8 resistive loads with different values each connected to an NPN type transistor coupled to an instrumentation chain. A digital control programmed by an ATmega electronic board allows the automation of the variations of the resistive load fed by a solar panel of 19V 5 W of power. A computer program developed on the basis of an algorithm according to the defined operation, drives the Arduino electronic board. The movement of the sun during the day leads to the consideration of angle of incidence. During experiments this fundamental parameter is set electronically for automatic acquisition with the parameters: of the solar panel temperature, ambient temperature and humidity in the environment. The automatic variation of the resistive load with the combinations of the 8 electrical resistors to obtain 256 measurements in a few milliseconds. This speed of measurement makes possible the assumption of constant sunshine during the characterization, with a high number of points, of current-voltage curves of the photovoltaic solar cell with good precision.