研究目的
To tackle the nonlinear transcendental equation and intractability of traditional photovoltaic (PV) cells model by proposing a two-step modeling method based on datasheet information.
研究成果
The proposed two-step modeling method effectively avoids the nonlinear transcendental equation, making the Newton iterative algorithm unnecessary for the solution of the model. The model is accurate and suitable for wide application, as verified by simulations of polycrystalline silicon, monocrystalline silicon, and thin-film PV modules.
研究不足
The study assumes that the open circuit voltage and short circuit current are independent of the series resistance Rs and shunt resistance Rsh, which may not hold under all conditions. The model's accuracy under low solar irradiance is significantly worse than under other conditions.
1：Experimental Design and Method Selection:
The study employs a two-step modeling method separating the PV cells model into the ideal model part and the resistance network part.
2：Sample Selection and Data Sources:
Data under Standard Test Conditions (STC) and Nominal Operating Cell Temperature (NOCT) conditions provided by the manufacturer are used.
3：List of Experimental Equipment and Materials:
PV modules polycrystalline silicon Kyocera KC200GT, monocrystalline silicon Shell SP70 and thin-film Shell ST
4：Experimental Procedures and Operational Workflow:
Parameters photocurrent Iph, reverse saturation current Io and ideality factor n are obtained for the ideal model part; parameters Rs and Rsh are obtained for the resistance network part.
5：Data Analysis Methods:
The open circuit voltage and short circuit current of three different material types of PV cells are compared with actual experimental data; current-voltage characteristic curves are analyzed.
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