Research of the dynamic characteristics of photovoltaic panels of different kinds
DOI:
https://doi.org/10.31734/agroengineering2020.24.083Keywords:
photovoltaic panel, solar tracker, parametric identification, parametric model, dynamic characteristicsAbstract
The current research is devoted to the analysis of the dynamic characteristics of photoelectric panels of different kinds. To conduct the experiment, three monocrystalline-, polycrystalline- and amorphous-silicon photoelectric panels were attached to the tracker, rotating east westward in the regime of the Sun tracking.
The experiment was conducted under two variants of operation of the photoelectric panels, particularly with a direct charge of the storage battery and direct load on the resistor. The research was performed in the regime of continuous operation, and the results of measuring of the insolation and induced voltage on the clamps of the photoelectric panels were registered by different time intervals with a daily file recording.
Using the method of parameter identification and a set of instruments System Identification Toolbox of identification of the system (MATLAB & Simulink), the researchers made a search of a rational model for the obtained files of measuring of the electric parameters of photoelectric panels, which describes dynamics of the panels with the adequate accuracy. In particular, the authors assessed the dynamics of a daily change of the level of solar radiation and the corresponding value of its voltage on the clamps of the photoelectric panels of different kinds, determined the step of the panel response to the changes of the level of solar radiation, as well as considered the character of change of a step response under different models. To analyze the data, obtained from different photoelectric panels, the researchers used the models of ARX, TF and OE type.
The experimental research and mathematical processing of the obtained data have not resulted in an optimal kind of the mathematical model of the photoelectric panel response to the current change of the level of solar radiation.
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