A simple circuit for characterization of photovoltaic module under uniform radiation and shading conditions

摘要

This paper proposes a practical method for characterization of photovoltaic (PV) systems under uniform radiation and under shading conditions, based on voltage and current graphics. A simple circuit to detect these shading conditions is projected to enhance the visualization of disturb caused by blocking one or more cells of the PV module. Therefore, this circuit is very interactive, because the curve changes instantly when the shading condition occurs. Thanks to it, this project is quite useful for educational purposes, in study of characterization of photovoltaic systems curves. The characteristic curves of the PV system under uniform radiation are necessary to compare with experimental results. Using an oscilloscope, the curves of a PV module under uniform radiation and partial shading are analyzed.