Diagnostic module for series-connected photovoltaic panels
Published in Solar Energy, 2019
Abstract:
An online diagnostic module for condition monitoring of two series-connected photovoltaic panels is presented. The technique is based on firstly perturbing the terminal voltages and currents of the panels with a switched-inductor circuit, which can also be used for differential power processing, to obtain the large-signal dynamic current-voltage characteristics of the panels. An evolutionary algorithm is used to estimate the intrinsic parameters of the panels from the time series of the sampled panel current and voltage. The conditions of the panels are monitored by observing the long-term changes in the extracted intrinsic parameters. Prototype data acquisition module for studying the conditions of solar panels of different technologies (amorphous and crystalline silicon) with different degrees of damage has been built and evaluated. Results reveal that the estimated intrinsic parameters from large-signal dynamic characteristic correlate with the observed health status of the tested panels. Theoretical predictions are favorably compared with experimental measurements.
How to cite:
Garaj, Martin, Kelvin Yiwen Hong, Henry Shu-Hung Chung, Alan Wai-lun Lo, and Huai Wang.
"Diagnostic module for series-connected photovoltaic panels." Solar Energy 196 (2020): 243-259.
Bibtex:
@article{garaj2020diagnostic,
title={Diagnostic module for series-connected photovoltaic panels},
author={Garaj, Martin and Hong, Kelvin Yiwen and Chung, Henry Shu-Hung and Lo, Alan Wai-lun and Wang, Huai},
journal={Solar Energy},
volume={196},
pages={243--259},
year={2020},
publisher={Elsevier}
}