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PV field reliability status—Analysis of 100 000 solar systems
Progress in Photovoltaics ( IF 8.0 ) Pub Date : 2020-03-15 , DOI: 10.1002/pip.3262
Dirk C. Jordan 1 , Bill Marion 1 , Chris Deline 1 , Teresa Barnes 1 , Mark Bolinger 2
Affiliation  

In this study, we analyzed annual production data from 100 000 photovoltaic systems as well as comments relating to their performance and maintenance. Our analysis revealed that 80% to 90% of all systems performed within 10% of the predicted production or better. Also, 56% of the systems were still performing above P50 or the median at 5 years. However, a small but significant tail of about 7000 systems perform below P90 expectations. In general, residential systems have a lower rate of failure than utility or commercial systems. Despite higher rates of component failures, utility systems lose less power than residential or commercial systems. This outcome is likely due to closer monitoring and better operations and maintenance practices. Inverters are still the components that reportedly fail most often (4%‐6%), but other failures such as unspecified repair and meters cause more production loss. Reported module failures are relatively rare (0.2%) and are within the range of historical values. Installation quality affects performance and safety as indicated by data showing connector, wiring, breaker, and fuse failures due to undersizing, electrical design, and improper connection. Lastly, early detection of degradation and proactive response resulted in less impact on production than reactive, unplanned repairs.

中文翻译:

光伏领域的可靠性状态— 100,000个太阳能系统的分析

在这项研究中,我们分析了来自10万个光伏系统的年度生产数据以及有关其性能和维护的评论。我们的分析表明,所有系统的80%至90%的性能在预期产量的10%或更高的范围内。同样,有56%的系统仍在P50或5年以上的中间值以上。但是,约有7000个系统的一小部分(但很大)的性能低于P90的预期。通常,住宅系统的故障率低于公用事业或商业系统。尽管组件故障率更高,但公用事业系统比住宅或商业系统损失的电能更少。可能由于更紧密的监控以及更好的操作和维护实践而导致了这一结果。逆变器仍然是最常发生故障的组件(4%‐6%),但是其他故障(例如未指定的维修和仪表)会导致更多的生产损失。报告的模块故障相对较少(0.2%),并且在历史值范围内。安装质量会影响性能和安全性,数据表明连接器,接线,断路器和保险丝由于尺寸过小,电气设计和连接不当而失效。最后,与被动的计划外维修相比,及早发现退化和主动响应对生产的影响较小。
更新日期:2020-03-15
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