Low-Cost Solar Irradiance Sensing for PV Systems

In particular, the board used in [8] mounts a low-end microchip device featuring a web server on an ethernet protocol, which is very interesting for distributed irradiance measuring. Since the solar irradiance is correlated to the Maximum Power Point (MPP), the neural approach was also used to deter...

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Bibliographic Details
Published in:Energies (Basel) 2017-07, Vol.10 (7), p.998
Main Authors: Carrasco, Miguel, Laudani, Antonino, Lozito, Gabriele, Mancilla-David, Fernando, Riganti Fulginei, Francesco, Salvini, Alessandro
Format: Article
Language:English
Subjects:
Accuracy
Energy industry
Ethernet
Instruction sets (computers)
Internet
Irradiance
Maximum power
Neural networks
parameter estimation
Photovoltaic cells
photovoltaic power systems
Power plants
Pyranometers
renewable energy
RISC
Sensors
Servers
Shading
solar radiation
Spectral sensitivity
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Summary:In particular, the board used in [8] mounts a low-end microchip device featuring a web server on an ethernet protocol, which is very interesting for distributed irradiance measuring. Since the solar irradiance is correlated to the Maximum Power Point (MPP), the neural approach was also used to determine the optimal voltage vmpp using a simple feed-forward ANN on low-end MCUs [9] and high-end Advanced Reduced Instruction Set Computer Machine (ARM) devices [10,11]. Several procedures can be used to extract those parameters either from experimental I-V curves [16] or from the manufacturer datasheet [17,18]. Since the sensing approach proposed in this work is based directly on model equations, an accurate procedure able to identify the model from experimental data such as the one shown in [16] is of paramount importance for the methodology implementation. 4. [...]the possibility to use the power-producing PV device itself as a “sensor” solves all problems of alignment and spectral response, giving an irradiance estimation that is meaningful in terms of energy production (instead of a theoretical value, as the one given by commercial pyranometers). [...]the accuracy of the measurements obtained, the practical advantages of the implementation, and the reduced cost involved, make the approach proposed in this work especially important to address problems of partial shading, for which a local sensing of solar irradiance is a critical factor in maximizing the power output of the plant.
ISSN:1996-1073
1996-1073
DOI:10.3390/en10070998