Mondol, Jayanta Deb, Yohanis, Yigsaw and Norton, Brian (2007) The Effect of Low Insolation Conditions and Inverter Oversizing on the Long-Term Performance of a Grid-Connected Photovoltaic System. Progress in Photovoltaics: Research and Applications, 15 . pp. 353-368. [Journal article]
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The performance of a roof mounted grid-connected photovoltaic (PV) system inNorthern Ireland was monitored over 3 years on annual, seasonal and monthly bases.The overall system performance was adversely affected by low insolation conditions;19% of total incident insolation was absorbed at irradiance level below 200 W/m2 and67% below 600 W/m2, only 6.2% above 900 W/m2. In summer and winter, the PVandsystem efficiencies were 9.0 and 8.5%, and 7.8 and 7.5%, respectively and inverterefficiencies were 86.8 and 85.8%, respectively. The inverter for this particular systemwas oversized; 77% of the total DC energy produced when inverter’s operating loadwas 50% of its rated capacity. The annual average monthly system performance ratio(PR) was 0.61 with seasonal variation 0.59 to 0.63. The average monthly PV, system andinverter efficiencies over the whole monitored period were 8.8, 7.6 and 86.8%, respectively. The main losses of the system were inverter DC/AC conversion loss, inverterthreshold loss and low insolation loss.
|Item Type:||Journal article|
|Keywords:||monitoring; grid-connected photovoltaics; performance ratio; PV efficiency; inverter efficiency|
|Faculties and Schools:||Faculty of Art, Design and the Built Environment|
Faculty of Art, Design and the Built Environment > School of the Built Environment
|Research Institutes and Groups:||Built Environment Research Institute|
Built Environment Research Institute > Centre for Sustainable Technologies (CST)
|Deposited By:||Dr Jayanta Mondol|
|Deposited On:||30 Nov 2009 15:40|
|Last Modified:||30 Nov 2009 15:40|
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