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From irradiance to output power fluctuations: the PV plant as a low pass filter
Author(s) -
Marcos Javier,
Marroyo Luis,
Lorenzo Eduardo,
Alvira David,
Izco Eloisa
Publication year - 2011
Publication title -
progress in photovoltaics: research and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.286
H-Index - 131
eISSN - 1099-159X
pISSN - 1062-7995
DOI - 10.1002/pip.1063
Subject(s) - irradiance , photovoltaic system , solar irradiance , filter (signal processing) , environmental science , power (physics) , computer science , physics , optics , meteorology , engineering , electrical engineering , quantum mechanics , computer vision
The power generated by large grid‐connected photovoltaic (PV) plants depends greatly on the solar irradiance. This paper studies the effects of the solar irradiance variability analyzing experimental 1‐s data collected throughout a year at six PV plants, totaling 18 MWp. Each PV plant was modeled as a first order filter function based on an analysis in the frequency domain of the irradiance data and the output power signals. An empiric expression which relates the filter parameters and the PV plant size has been proposed. This simple model has been successfully validated precisely determining the daily maximum output power fluctuation from incident irradiance measurements. Copyright © 2011 John Wiley & Sons, Ltd.