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Energies 2015, 8(7), 6641-6657; doi:10.3390/en8076641

Proof of Concept of an Irradiance Estimation System for Reconfigurable Photovoltaic Arrays

Department of Energy, Information Engineering and Mathematical Models (DEIM), University of Palermo, Viale delle Scienze, Edificio 9, Palermo 90128, Italy
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Academic Editor: Jean-Michel Nunzi
Received: 12 April 2015 / Revised: 21 June 2015 / Accepted: 23 June 2015 / Published: 30 June 2015
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Abstract

In order to reduce the mismatch effect caused by non-uniform shadows in PV arrays, reconfigurable interconnections approaches have been recently proposed in the literature. These systems usually require the knowledge of the solar radiation affecting every solar module. The aim of this work is to evaluate the effectiveness of three irradiance estimation approaches in order to define which can be well suited for reconfigurable PV arrays. It is presented a real-time solar irradiance estimation device (IrradEst), implementing the three different estimation methods. The proposed system is based on mathematical models of PV modules enabling to estimate irradiation values by sensing a combination of temperature, voltage and current of a PV module. Experimental results showed generally good agreement between the estimated irradiances and the measurements performed by a standard pyranometer taken as reference. Finally one of the three methods was selected as possible solution for a reconfigurable PV system. View Full-Text
Keywords: photovoltaic fields; monitoring; dynamic reconfiguration system; irradiance estimation; reconfigurable PV array photovoltaic fields; monitoring; dynamic reconfiguration system; irradiance estimation; reconfigurable PV array
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Vigni, V.L.; Manna, D.L.; Sanseverino, E.R.; di Dio, V.; Romano, P.; di Buono, P.; Pinto, M.; Miceli, R.; Giaconia, C. Proof of Concept of an Irradiance Estimation System for Reconfigurable Photovoltaic Arrays. Energies 2015, 8, 6641-6657.

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