UM  > Faculty of Science and Technology  > DEPARTMENT OF ELECTROMECHANICAL ENGINEERING
A Comparative Analysis of the Performance of a Grid-Connected Photovoltaic System Based on Low-and High-Frequency Solar Data
Su Y.
2015
Source PublicationInternational Journal of Green Energy
ABS Journal Level2
ISSN15435083 15435075
Volume12Issue:12Pages:1206-1214
Abstract

The performance of solar photovoltaic (PV) systems has been widely investigated based on the low-frequency data such as hourly or daily solar data. However, its short-term performance monitored at high frequency has been relatively less studied. This paper presents the short-term performance of a grid-connected solar photovoltaic (PV) system monitored at 1-min interval from July 1, 2010 to June 30, 2011 and compares with the daily performance. The summary results based on mean, standard deviation, and coefficient of variation (CV) are presented. The results indicate that the yearly means of the minutely array output power and the minutely global horizontal irradiance (GHI) in a typical day are bell-shaped. The CV pattern of the minutely array output power appears to be U-shaped while the CV pattern of the minutely GHI is varying within a horizontal zone of [0, 5%]. More importantly, the minutely data reveal that the output power responds nonlinearly to changes in solar irradiance while the hourly data conventionally used suggest a linear relationship between them. A piecewise quadratic model was built to fit the nonlinear relationship between array output power and GHI based on the minutely data. The model was proved to be accurate with high value of R2 and validated by the measured data.

KeywordHigh-frequency Data Output Power Short-term Performance Solar Irradiance Solar Pv System
DOI10.1080/15435075.2014.893880
URLView the original
Indexed BySCIE
WOS Research AreaThermodynamics ; Science & Technology - Other Topics ; Energy & Fuels
WOS SubjectThermodynamics ; Green & Sustainable Science & Technology ; Energy & Fuels
WOS IDWOS:000357863700002
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Cited Times [WOS]:3   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTROMECHANICAL ENGINEERING
AffiliationUniversidade de Macau
First Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Su Y.. A Comparative Analysis of the Performance of a Grid-Connected Photovoltaic System Based on Low-and High-Frequency Solar Data[J]. International Journal of Green Energy,2015,12(12):1206-1214.
APA Su Y..(2015).A Comparative Analysis of the Performance of a Grid-Connected Photovoltaic System Based on Low-and High-Frequency Solar Data.International Journal of Green Energy,12(12),1206-1214.
MLA Su Y.."A Comparative Analysis of the Performance of a Grid-Connected Photovoltaic System Based on Low-and High-Frequency Solar Data".International Journal of Green Energy 12.12(2015):1206-1214.
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