The risk of power loss in crystalline silicon based photovoltaic modules due to micro-cracks

Köntges, Marc; Kunze, I.; Kajari‐Schröder, Sarah; Breitenmoser, X.; Bjørneklett, B.

doi:10.1016/j.solmat.2010.10.034

Cited by 256 publications

(170 citation statements)

References 6 publications

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“…Due to the missing cell area the cell is driven into reverse bias and the full current can flow along the localized path. This may cause hot spots and therewith burn marks [21].…”

Section: Cell Cracksmentioning

confidence: 99%

Development of a GIS Tool for a High Precision PV Degradation Monitoring and Supervision: Feasibility Analysis in Large and Small PV Plants

Simón-Martín¹,

Diez-Suárez²,

Prado³

et al. 2017

Preprint

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Abstract:It is well known that working PV plants show several maintenance needs due to wiring and modules degradation, mismatches, dust and PV cells defects and faults. There are a wide range of studies that show the theoretical and some laboratory tests of how these circumstances may affect the PV production. Thus, it results mandatory to evaluate the whole PV plant performance and, then, it's payback time, profitability and environmental impact or carbon footprint. However, very few studies include a systematic procedure to quantify and supervise the real degradation effects and faults impacts on the field. In this paper, the authors first conduct a brief review of the most frequent PV faults and degradation that can be found on real conditions operative PV Plants. Then, they propose and develop an innovative Geographic Information System application to locate and supervise them. The designed tool has been applied to either a large PV plant of 108 kWp and a small PV plant of just 9 kWp installed on a home rooftop. For the large PV plant, 24 strings of PV modules have been modelized and introduced into the GIS application and every module in the power plant has been studied including voltage, current, power, series and parallel resistance, fill factor, normalized PV curve to STC, thermography and visual analysis. For the small PV installation 3 strings of PV panels have been studied identically. It must be noticed that PV modules in this case include power optimizers. The precision of the study allows the researchers to locate and supervise up to a third part of every PV cell in the system, which are adequately georreferenciated. The developed tool allows both the researchers and the investors to increase control on the PV plant performance and conducts to a better planification of maintenance actuations and to evaluate several PV modules replacement strategies in a preventive maintenance programme. Found PV faults include hot spots, snail tracks, EVA discoloration, PV cells fractures, busbars discoloration, bubbles and Si discoloration.

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“…Due to the missing cell area the cell is driven into reverse bias and the full current can flow along the localized path. This may cause hot spots and therewith burn marks [21].…”

Section: Cell Cracksmentioning

confidence: 99%

Development of a GIS Tool for a High Precision PV Degradation Monitoring and Supervision: Feasibility Analysis in Large and Small PV Plants

Simón-Martín¹,

Diez-Suárez²,

Prado³

et al. 2017

Preprint

View full text Add to dashboard Cite

show abstract

“…However, when cell regions are isolated or inactive, the photo-generated current I SCcracked and the recombination current (I 01cracked and I 02cracked ) will decrease respecting the following equations [7,10]:…”

Section: B Cells Cracks Modelingmentioning

confidence: 99%

“…As PV panels generally expected to operate at MPP, the I MPP (current at maximum power point in A) is lower than the I SC , no power decrease is noted if the following equation is respected [7]:…”

Section: B Cells Cracks Modelingmentioning

confidence: 99%

“…The cell becomes reverse biased and the current of the string flows through it. If its breakdown voltage is high, the current flows in the bypass diode if present [7]. It must be noted that having one or more cracked cells in a string lead approximately to the same power loss.…”

Section: B Cells Cracks Modelingmentioning

confidence: 99%

“…Many PV specialists are studying the degradation of PV panels [2][3][4][5][6][7][8]. They use accelerated tests to show the effect of environmental conditions on PV panels.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A geometric approach for PV modules degradation

Nehme

M'Sirdi

Akiki

2014

International Conference on Renewable Energies for Developing Countries 2014

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To cite this version:Bechara Nehme, Nkm 'Sirdi, Tilda Akiki. A geometric approach for PV modules degradation. REDEC-2014, Nov 2014 A geometric approach for PV modules degradation Abstract-This paper presents an overview of two degradation modes of PV panels: the Moisture Induced Degradation and the Cell Cracks. The two mentioned degradation modes affect PV cells differently according to their position in the module. At a previous stage, we have build a PV model that takes into consideration three degradation modes, the Potential Induced Degradation, the Light Induced Degradation, and the Ultraviolet Light Degradation. In this paper, we update our model to take into consideration all degradation modes.

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The Different PV Technologies and How They Degrade

Krebs

2012

Stability and Degradation of Organic and Polymer Solar Cells

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The risk of power loss in crystalline silicon based photovoltaic modules due to micro-cracks

Cited by 256 publications

References 6 publications

Development of a GIS Tool for a High Precision PV Degradation Monitoring and Supervision: Feasibility Analysis in Large and Small PV Plants

Development of a GIS Tool for a High Precision PV Degradation Monitoring and Supervision: Feasibility Analysis in Large and Small PV Plants

A geometric approach for PV modules degradation

The Different PV Technologies and How They Degrade

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