Predicting the long term power loss from cell cracks in PV modules

Gade, Vivek; Shiradkar, Narendra; Paggi, Marco; Opalewski, Jared

doi:10.1109/pvsc.2015.7355665

Cited by 14 publications

(14 citation statements)

References 6 publications

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“…6b is depicted in Fig. 7, and its impedance Z is presented in (8). It is clear that the effect of the parallel capacitor C p appears by studying the dynamic regime…”

Section: Dynamic Pv Modellingmentioning

confidence: 99%

“…The panel with efficiency at 80.73% indicates that it is approaching its end-of-life, which is much shorter than the expected long lifespan. Based on this concern, the micro-cracks failure mechanisms and impact are reviewed in [3,[5][6][7][8][9][10]. The cracks are most likely generated during the manufacturing, transportation and installation stages, and the mechanical stress such as snow loads could increase the possibility to develop a larger crack [5].…”

Section: Introductionmentioning

confidence: 99%

“…However, if the inactive area continuously grows with the cracks to around 12-50%, the power losses increase almost linearly. Load tests are conducted in [7,8], aiming at evaluating the criticality of different types of cracks, and predicting the losses caused by them and their propagation, respectively. A high criticality is considered if a crack has high possibility to form an electrically isolated area of 16-24% potentially in [7].…”

Section: Introductionmentioning

confidence: 99%

“…The aforementioned research reviewed the failure mechanism, detrimental effects, criticality, and potential risks of cracks on PV panels. The evaluations in most of the above work in [3,[5][6][7][8][9][10] are through using the I-V and P-V curves to indicate the output power generation capability, which is the static behaviour of PV panels. An alternative is to use impedance spectroscopy [11][12][13][14][15], which reflects the dynamic behaviour of a cracked PV panel.…”

Section: Introductionmentioning

confidence: 99%

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Experimental study of static and dynamic behaviours of cracked PV panels

Al-Soeidat

Tian

et al. 2019

IET Renewable Power Generation

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Solar cell power performance is greatly affected by two critical factors ageing and crack. In order to mitigate their negative effects on the solar system, these cells are to be substituted by new cells, thus, replacing the panels. This study presents an active crack detection method that detects the cracked cells within a solar string by using AC parameter characterisation without a need to have a physical inspection. The mathematical module of the solar cell shows that it constitutes of series and parallel resistors in addition to a parallel capacitor and that their values change by ageing and crack. In addition to studying the effects of the crack on the solar cell, it is verified by the experiment that the solar cells behave as a capacitive circuit, and their capacitance increases when the cell gets cracked, getting higher as the crack becomes more serious. The experiment is extended to investigate the effect of series and parallel PV strings, which are affected by cracked and partially shaded cells to evaluate their criticality levels. By monitoring the AC parameter of the solar cell and the change of the capacitance, it is easy to detect the crack when it occurs.

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“…6b is depicted in Fig. 7, and its impedance Z is presented in (8). It is clear that the effect of the parallel capacitor C p appears by studying the dynamic regime…”

Section: Dynamic Pv Modellingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental study of static and dynamic behaviours of cracked PV panels

Al-Soeidat

Tian

et al. 2019

IET Renewable Power Generation

View full text Add to dashboard Cite

show abstract

“…The results verify the theory that cracks parallel to busbar are the most critical ones, which not only have a high probability to form an electrical disconnection, but also have a high degradation percentage after 200 HF cycles. Lamination experiments with varied loads are conducted in [7] aiming at predicting the loss caused by the cracks and its propagation. The results indicate that, cracks do not necessarily cause the electrical isolation.…”

Section: Introductionmentioning

confidence: 99%