Construcation and Application of I-V Curves Using Voltage -Current Characteristic Equations under Irradiated Conditions of Photovoltaic Cells

Abstract

In development, design and operation of photovoltaic power generation systems, a technique for constructing I-V curves under different levels of solar irradiance and module temperature condition susing basic characteristic values of photovoltaic modules is required.
For this purpose, we have already developed a practical I-V curve construction method and are using it in the evaluation of the output of a photovoltaic power generation system as well as in the core section of a simulation program to determine the amount of powor generated by a photovoltaic power generation system.
This time, we have developed an I-V curve construction method based on a different viewpoint from the above, namely, we developed an I-V curve construction method using current-oltage characteristic equations under photovoltaic cell irradiated conditions. Using this method, we can obtain I-V curves not only in the first quadrant but also in the second and fourth quadrants.
In this report, we discuss the outline of the I-V curve construction method using current-voltage characteristic equations of photovoltaic celles, as well as verification test results and application examples.