Experimental investigation of the effect of partial shading on photovoltaic performance. Issue 7 (25th May 2017)

• Record Type: Journal Article
• Authors: Mamun, Mohammad Abdullah Al; Hasanuzzaman, Md; Selvaraj, Jeyraj
• Is Part Of: IET renewable power generation. Volume 11:Issue 7(2017)
• Page Start: 912
• Page End: 921
• Publication Date: 2017-05-25
• Subjects: photovoltaic power systems -- sunlight; photovoltaic installation -- PV installation -- power production -- partial shading effect -- constant irradiation condition -- variable solar radiation -- variable irradiation condition -- electrical power output -- power 3.89 W -- power 3.37 W -- power 2.27 W -- power 2.02 W -- power 90 W -- power 12.41 W -- efficiency 2.3 percent; Renewable energy sources -- Periodicals; 333.79405
• DOI: 10.1049/iet-rpg.2016.0902
• Languages: English
• ISSNs: 1752-1416

Abstract

Abstract : Partial shading of a photovoltaic (PV) installation has an inconsistent impact on power production. This study investigates the effect of partial shading on PV performance. The experiments were carried out with a 90‐W PV module under both variable and constant irradiations with shaded area increased from 0 to 80% to observe the effect of variable solar radiation at certain shading points. The effect of shading under irradiation levels from 300 to 800 W/m 2 was investigated. At a 600 W/m 2 irradiation level, the shading impact factor was 1.25 with a 25% shading, while at 75% shading the impact factor decreased to 0.86. Results also show that for every 100 W/m 2 increase in irradiation level, the electrical power output was enhanced by 3.89, 3.37, 2.27, and 2.02 W at 0, 25, 50, and 75% shading, respectively. The efficiency level was increased by 0.29, 0.27, 0.25, and 0.22% at 0, 25, 50, and 75% shading, respectively. Increasing the shaded area by 10% causes a 12.41 W drop in power output and a 2.3% drop in electrical efficiency. Partial shading not only deteriorates the PV performance, but also causes long‐term degradation of the module.