Development software program for finding photovoltaic cell open-circuit voltage and fill factor based on the photovoltaic cell one-diode equivalent circuit model

Abstract

The fill factor is used to determine the quality of electricity generated by the photovoltaic cell. . Open circuit voltage in PV cell is the maximum voltage value that the cell can transmit. The analysis of PV cell fill factor and open circuit voltage was carried out with the developed software program. The PV cell is the smallest building block of the PV solar system and produces voltages between 0.5V and 0.7V. It acts as a current source in the equivalent circuit. The amount of radiation hitting the cell determines how much current it produces. The equivalent circuit of an ideal PV cell consists of a diode and a parallel current source. In order to express losses in applications, series and parallel resistance are added to the ideal equivalent circuit of the PV cell. There are many equivalent circuits in the literature for modeling the equivalent circuit of a PV cell. The single diode equivalent circuit is the most widely used model because of its simplicity and ease of analysis. In this study, Newton-Raphson method was used to find the equivalent circuit parameters of a PV cell. Then, the open circuit voltage and fill factor were found with the software program prepared in Matlab and given in Appendix A. KeywordsPV cell fill factor, PV cell open circuit voltage. Software program. Five unknown parameters. I-V characteristics of PV cell. PV cell equivalent circuit models .