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Nondestructive monitoring of damage caused by accelerated ageing in photovoltaic modules
Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering ( IF 2.3 ) Pub Date : 2019-11-28 , DOI: 10.1177/0954406219889382
Irene Berardone 1 , Marco Paggi 1
Affiliation  

Due to outdoor exposure, photovoltaic (PV) modules are subjected to degradation phenomena during their expected lifetime (20–25 years). Producer warranties claim power losses lower than 10% of the initial nominal power during the first 10–12 years, and up to 20% after 20–25 years of operation, with different power loss rates.1 Many external sources of stress, like solar radiation, wind, high temperature excursions, moisture, hail impacts, vibrations, fatigue, etc. contribute to PV damage.1–7 PV degradation manifests itself as a gradual deterioration of materials and components, affecting the optimal working conditions.8,9 As a result of that, electrical performances might decrease over time. In addition to this, safety issues are also related to material and component degradation. Conventionally, a relevant degradation occurs when the PV power output drops below 80% of its initial value,2 while the excess of degradation over a threshold specified for each failure mode could be critical for PV operation.10

中文翻译:

无损监控光伏模块加速老化所造成的损坏

由于暴露在室外,光伏(PV)模块在其预期寿命(20-25年)内会发生降解现象。生产者保修要求在最初的10–12年内,功率损耗低于初始标称功率的10%,在运行20–25年后,功率损耗高达20%,且功率损耗率不同。1许多外部压力源,例如太阳辐射,风,高温偏移,湿气,冰雹撞击,振动,疲劳等,都会造成PV损坏。1–7 PV退化表现为材料和组件的逐渐退化,影响了最佳工作条件。8,9结果,电性能可能随时间降低。除此之外,安全问题还与材料和组件的退化有关。常规上,当PV功率输出降至其初始值的80%以下时会发生相关的降级2,而对于每种故障模式而言,超出指定的阈值的降级过量可能对PV操作至关重要。10
更新日期:2020-01-04
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