Comparative investigations of the effects of soiling of PV modules and systems in tropical, subtropical, and semi-arid climate zones in Brazil
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Universidade Federal de Minas Gerais
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Brasil's principally southern-hemisphere geographic location represents interesting, complex, and comparative opportunities for soiling studies, encompassing sub-tropical, tropical, and Semi-Arid climate zones. This paper summarizes our methodology, with results quantifying the soiling ratios (SRatio) and soiling rates (SRate) for different photovoltaic (PV) technologies installed in diverse climate-zones in Brazil (based on our climate-zone mapping). Specifically, these analytic procedures are validated for soiling monitoring stations composed of both mc-Si and thin-film CdTe modules. A mathematical model determined the SRatio and SRate for each site (in compliance with the IEC-61324-1 monitoring standard). The results specify: (1) a mean SRatio for the period of analysis for Belo Horizonte (-19.92° N, Lo-43.99° W), Porto Alegre (-30.05° N, -51.17° W), and Brotas de Macaúbas (12.0011° S, 42.6303° W). From the SRatio characteristics, (2) the dry-season data were used to estimate the SRate through the Theil-Sem estimator. In addition, a method for analyzing energy production data of PV systems in order to extract the soiling rate is presented.
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Geração de energia fotovoltaica
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Tropical Regions , Climate Zones , Photovoltaic System , Photovoltaic Modules , Subtropical Climate Zone , Tropical Climate Zones , Semi-arid Climate Zone , Zone Of Brazil , System In Order , Monitoring Stations , Thin-film Solar Cells , High Temperature , Control System , Maximum Power , Dry Season , Weather Station , I-V Curves , Dry Period , Short-circuit Current , Soil Loss , Locations In Brazil , Cumulative Precipitation , Wet Periods , Incident Solar Radiation , End Of September
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https://ieeexplore.ieee.org/document/8980505