Implementation of a power supply with the characteristics of solar panels under partially shaded

This paper aims at producing a power supply with the characteristics of solar panels under partially shaded. Temperature and solar illumination can be set up on the power supply to emulate the characteristics of a solar panel, which can be provided for exploring the effect of a solar panel when it is shaded by clouds or polluted by dust. In this paper, uniform solar illumination model and partial shading model with two solar modules in series are proposed. A buck converter is adopted to adjust the output of power supply. The adjustments are made in accordance with the quiescent points of solar panels obtained from a digital signal processor on a basis of the load impedance and the characteristics of solar panels. Finally, this study develops a power supply with the maximum short circuit current of 5A and maximum open circuit voltage of 60V. Load is changed time after time so as to depict V-I curve and verify the practicability of the power supply.