Detecting Defects in Photovoltaic Panels With the Help of Synchronized Thermography

Christian Schuss, Kari Remes, Kimmo Leppanen, Juha Saarela, Tapio Fabritius, Bernd Eichberger, Timo Rahkonen
2018 IEEE Transactions on Instrumentation and Measurement  
This paper investigates defects in photovoltaic (PV) panels, more precisely, the location of defects in PV panels. With the help of electrical verification, it is possible to verify the impact of defects on output performances. However, it is not possible to determine the location of defects in order to address the origin of problems, for example, in the manufacturing process of PV panels. In this paper, the focus lies on finding similarities in the location of defect areas in PV panels.
more » ... n PV panels. Samples were characterised with the help of synchronized thermography (ST) and time-resolved thermography (TRT) in order to obtain infrared (IR) images of PV panels. IR-images are helpful to obtain a visual image on the health of PV panels, identify the position of defects and estimate the influence of defects on the output power. This information can be useful, for example, for improving the fabrication process of PV panels. Index Terms-defect, interconnection, photovoltaic cell, photovoltaic panel, solar energy, synchronized thermography, timeresolved thermography. λ = 400 W/m 2 λ = 500 W/m 2 λ = 600 W/m 2 λ = 1000 W/m 2 PV panel 1 Pmpp [W] = 1.60 ± 0.044 Pmpp [W] = 1.93 ± 0.053 Pmpp [W] = 2.26 ± 0.062 Pmpp [W] = 3.88 ± 0.11 PV panel 2 Pmpp [W] = 1.44 ± 0.040 Pmpp [W] = 1.74 ± 0.048 Pmpp [W] = 2.05 ± 0.057 Pmpp [W] = 3.49 ± 0.10 PV panel 3 Pmpp [W] = 1.92 ± 0.053 Pmpp [W] = 2.32 ± 0.064 Pmpp [W] = 2.72 ± 0.075 Pmpp [W] = 4.66 ± 0.13 PV panel 4 Pmpp [W] = 1.77 ± 0.049 Pmpp [W] = 2.14 ± 0.059 Pmpp [W] = 2.50 ± 0.069 Pmpp [W] = 4.29 ± 0.12 PV panel 5 Pmpp [W] = 1.70 ± 0.046 Pmpp [W] = 2.06 ± 0.056 Pmpp [W] = 2.42 ± 0.066 Pmpp [W] = 4.13 ± 0.11 PV panel 6 Pmpp [W] = 1.48 ± 0.041 Pmpp [W] = 1.78 ± 0.049 Pmpp [W] = 2.09 ± 0.058 Pmpp [W] = 3.58 ± 0.10 AM1.5; Tc = 25 • C; Measurements (λ = 400 W/m 2 , λ = 500 W/m 2 , λ = 600 W/m 2 ) under outdoor environmental conditions PV simulation model for λ = 1000 W/m 2 (STC)
doi:10.1109/tim.2018.2809078 fatcat:2nzrbq7fh5abzmxysihywffyqq