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Technical Brief

Simulation of Energy Production in Grid-Connected Photovoltaic Systems From Measured and Calculated Data From Clear-Sky Radiation Model

[+] Author and Article Information
Carlos Henrique Rossa

PPGEM—UNISINOS,
Av. Unisinos, 950,
Sala 6A243,
São Leopoldo 93022, Brazil
e-mail: carlos_kibeatle@hotmail.com

João Batista Dias

PPGEM—UNISINOS,
Av. Unisinos, 950,
Sala 6A235,
São Leopoldo 93022, Brazil
e-mail: joaobd@unisinos.br

Mário Henrique Macagnan

PPGEM—UNISINOS,
Av. Unisinos, 950,
Sala 6A235,
São Leopoldo 93022, Brazil
e-mail: mhmac@unisinos.br

30 deg S and 51.2 deg W.

Contributed by the Solar Energy Division of ASME for publication in the JOURNAL OF SOLAR ENERGY ENGINEERING: INCLUDING WIND ENERGY AND BUILDING ENERGY CONSERVATION. Manuscript received October 13, 2014; final manuscript received November 25, 2014; published online December 30, 2014. Assoc. Editor: Santiago Silvestre.

J. Sol. Energy Eng 137(3), 034502 (Jun 01, 2015) (3 pages) Paper No: SOL-14-1299; doi: 10.1115/1.4029381 History: Received October 13, 2014; Revised November 25, 2014; Online December 30, 2014

This paper presents a comparison of the energy production in grid-connected photovoltaic systems (GCPPS) from measured and calculated radiation data. The Linke turbidity (TL) factor for the region of Porto Alegre, Brazil, was extracted considering the data of direct solar radiation from the typical meteorological year (TMY). The average annual turbidity value obtained of 4.03 agrees with the wet climate of the region which presents only 17.26% of clear-sky days. There was a difference of 27.5% in the results of the produced energy, which drops to 6.5% when compared with only sunny days in the region, suggesting that the model in the current configuration for this type of estimate is barely adequate.

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Figures

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Fig. 1

Basic diagram of a GCPPS

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Fig. 2

Variation of monthly average TL throughout the year in Porto Alegre, Brazil

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Fig. 3

Energy production on clear-sky days in Porto Alegre, using the TMY and ESRA model

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Fig. 4

Comparison of energy production on sunny days from the TMY with the corresponding sunny days from the ESRA model

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