Simulation of a photovoltaic panel in the LabVIEW environment
DOI:
https://doi.org/10.31734/agroengineering2022.26.071Keywords:
computer simulation, photovoltaic panel, application software, the LabVIEW environmentAbstract
The work presents theoretical fundamentals and the computer model of a photovoltaic unit developed in the LabVIEW environment. The theoretical model of a perfect photovoltaic panel is composed on the basis of power source with the diode parallel connection. To maximum approach the model to a real one, it is supplemented with supporters of serial and parallel connection. To consider the impact of temperature on the electric parameters of the photovoltaic panel, that factor is included in the model. The justified characteristics of the photovoltaic model in terms of relations between the solar radiation flux, current and voltage have created a theoretical basis of the developed computer model. To study the volt-ampere and volt-power characteristics of the photovoltaic panel, the authors composed virtual two-coordinate oscillographs which monitor the impact of influencing factors during their change. To assess the impact of temperature on the initial characteristics of the photovoltaic panel, the authors composed virtual two-coordinate oscillographs which demonstrate changes of the volt-ampere and volt-power characteristics due to the impact. Using the passport data of a real photovoltaic panel, the researchers can assess conformity of the composed computer model. The presented computer model enables studying the impact of the solar radiation level, temperature and the mode of energy drawing on the initial parameters of the photovoltaic panel under a wide range of the influencing factors change. In particular, the computer model of the photovoltaic unit is demonstrated in the conditions of variable solar radiation flux under a permanent temperature and alternating load, as well as under a permanent level of the solar radiation flux and alternating temperature with the corresponding change of load. The presented computer model is a constituent of the expert system of computer simulation of the operation modes of the means of complex transformation of renewable sources of energy into the thermal and electric power.
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