Experimental Comparison of Visual Inspection and Infrared Thermography for the Detection of Soling and Partial Shading in Photovoltaic Arrays

2021 ◽  
pp. 302-321
Author(s):  
Leonardo Cardinale-Villalobos ◽  
Carlos Meza ◽  
Luis D. Murillo-Soto
Keyword(s):  
Infrared Thermography ◽  
Visual Inspection ◽  
Experimental Comparison ◽  
Partial Shading ◽  
Photovoltaic Arrays

Comparative analysis of series and parallel photovoltaic arrays under partial shading conditions

2012 ◽  
Author(s):  
Renan Diego de Oliveira Reiter ◽  
Leandro Michels ◽  
Jose Renes Pinheiro ◽  
Rene Alfonso Reiter ◽  
Sergio Vidal Garcia Oliveira ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Partial Shading ◽  
Photovoltaic Arrays

scholarly journals Detection of Hotspots and Performance Deteriotations in PV Modules under Partial Shading Conditions Using Infrared Thermography

2020 ◽  
Vol 2 (1) ◽  
pp. 71
Author(s):  
Onyinye Emmanuella Ikejiofor ◽  
Yeboah Emmanuel Asuamah ◽  
Howard O. Njoku ◽  
Samuel O. Enibe
Keyword(s):  
Infrared Thermography ◽  
Thermal Imager ◽  
Ambient Conditions ◽  
Partial Shading ◽  
Surface Areas ◽  
Current Voltage ◽  
Pv Modules ◽  
Thermal Patterns ◽  
And Performance ◽  
Infrared Thermal Imager

Operating photovoltaic (PV) modules are frequently shaded by nearby structures, vegetation, droppings, etc., and this reduces the effective incident solar radiation received by the modules. Shading also reduces the power output of PV modules and, under certain conditions, causes the formation of hotspots. In this study, a wide variety of partial shading scenarios were investigated to evaluate their effects on the output current, voltage and efficiencies, and hotspot formation in mono-crystalline and poly-crystalline PV modules operating under the ambient conditions experienced in Nsukka, Nigeria. Sixteen shading cases were considered, including 20%, 40%, 60% and 80% of the modules’ surface areas shaded parallel to the long sides, parallel to the short sides, diagonally and randomly. Test ambient conditions, module outputs and surface thermal patterns were simultaneously monitored using a digital solarimeter, multimeter and infrared thermal imager, respectively. The outputs of the modules decreased to almost zero when as little as 40% of the module surfaces were shaded, with the reductions in performance being more severe in the mono-crystalline modules than in the poly-crystalline modules. The infrared thermography revealed the thermal patterns under the different shading conditions and showed that the random shading of the modules was the most likely to result in hotspots.

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