Journal article

Photovoltaic Cell/Module Equivalent Electric Circuit Modeling Using Impedance Spectroscopy


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Publication Details

Author list: Olayiwola OI, Barendse PS

Publisher: Institute of Electrical and Electronics Engineers (IEEE)

Publication year: 2020

Journal: IEEE Transactions on Industry Applications

Volume number: 56

Issue number: 2

Start page: 1690

End page: 1701

Total number of pages: 12

ISSN: 0093-9994


Abstract

This work is focused on the dynamic alternating current equivalent electric circuit (AC-EEC) modeling of the polycrystalline silicon wafer-based photovoltaic cell and module under various operational and fault conditions. The models are drawn from the impedance changes observed using electrochemical impedance spectroscopy. Vital considerations for valid impedance data and appropriate parameter extraction were also discussed. In this work, cell-level tests were carried out at different voltage bias levels under illumination, dark, uniform partial shading, and cell-mismatch conditions. The cell characterization procedure was then used as a basis for developing the photovoltaic (PV) module level model. Normal illumination and partial shading tests were carried out at the module/panel level. The AC-EEC model for both the levels was obtained from the associated Nyquist and Bode plots. These models were then used to extract the internal cell/module parameters and the associated trends were observed. Results obtained demonstrates that the variations of the ac model give several parameters that show distinct variation such that they can be used for inline characterization and real-time condition monitoring of the photovoltaic cells/module under the different operational and fault conditions.


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Last updated on 2021-06-03 at 11:32