A NOVEL METHOD BASED ON BISECTION SEARCH ALGORITHM FOR EXTRACTING THE REFERENCE PARAMETERS OF PV MODULES

Year 2019, , 81 - 90, 11.12.2019

Ceyhun Kapucu , Mete Çubukçu

https://doi.org/10.22531/muglajsci.602222

Abstract

Manufacturers
generally share datasheet values of photovoltaic (PV) modules at only standard
test conditions (STC). These conditions enable PV modules to generate high
power but are rarely encountered in the real environment. Therefore, accurate
modeling of PV modules is very important in terms of estimating the energy that
can be obtained under all operating conditions. Many studies have been
conducted in this field in the literature. In this study, a new method is
proposed for the implementation of the commonly used five-parameter model. This
new method uses a bisection search algorithm for calculating the value of the
series resistance, which is one of the five parameters, and thus extracting the
other parameters. The datasheet values provided by the manufacturers are
sufficient for obtaining the series resistance and therefore other parameters.
The accuracy of the method was first tested by comparing the datasheet values of
the three different PV modules with the outputs of the proposed method.
Finally, the simulation accuracy of the proposed method for different operating
conditions was tested by comparing the real measurement data collected by the
National Renewable Energy Laboratory (NREL) with the outputs of the method
under the same operating conditions. The results show that the proposed method
demonstrates good agreement with both datasheet values and real measurement
data. The method offers a good balance of simplicity-accuracy.

Keywords

Photovoltaic modelling, Bisection search algorithm, Five-parameter model

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