Diagnostics of Solar Cells

Valeriy Martynyuk,Juliy Boiko,Janusz Musiał,Ewa Kuliś,Marcin Łukasiewicz,J Musiał,M Matuszewski,T Kałaczyński,Ł Muślewski

doi:10.1051/matecconf/201930201013

Abstract

The paper represents the mathematical model for diagnostics of solar cell. The research objectives are the problem of determining a solar cell technical condition during its operation. The solar cell diagnostics is based on the mathematical model of solar cells. The single-diode solar cell model is characterized by a slight deviation of the theoretically calculated characteristics from the characteristics of the real solar cell, one of the reasons being the complexity of the accurate measurement of the series resistance. The single-diode solar cell model uses the current and voltage ratio in the form of an implicit function and it cannot be solved directly. For its solution it is necessary to use numerical methods. This is main disadvantage of the single-diode solar cell model. The methodological approach to increasing the reliability of the solar cell diagnostic has been proposed, in terms of multi-parameter the solar cell diagnostic by applying the solar cell impedance model.

Highlights

The problem of finding alternative energy sources has become urgent over the last few decades
Due to the internal photoelectric effect under the influence of solar radiation, there is a redistribution of charges that results in the appearance of electromotive force (EMF), which makes it possible to directly convert the energy of sun light into electrical energy [1, 2]
The single-diode model in fig. 1 is characterized by a slight deviation of the theoretically calculated characteristics from the characteristics of the real solar cell, one of the reasons being the complexity of the accurate measurement of the series resistance in a solar cell model [2]

Summary

Introduction

The problem of finding alternative energy sources has become urgent over the last few decades. Solar cell diagnostics is an information procedure the purpose of which is to reflect its technical condition in the form of a conclusion about the nature and significance of this condition. Such a conclusion regarding the diagnostic results is called a diagnosis [3]. If at least one of these parameters, regardless of its impact on the solar cell ability to perform its functions, will not fulfill these requirements, the technical condition is considered unserviceable. A solar cell is in an operable technical condition if its relevant diagnostic parameters are within the limits where working functions can be performed. When the diagnostic parameters go beyond the specified limits, the solar cell can no longer fully perform its functions, and it has to be considered faulty

Solar cell mathematical model

Solar cell diagnostics system

Findings

Conclusions