Impact of the mission profile length on lifetime prediction of PV inverters
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Universidade Federal de Minas Gerais
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Artigo de periódico
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The first step of the design for reliability (DFR) approach in PV inverters is the translation of the mission profile into thermal loading. Most works employ only a one-year mission profile even though it is known that it changes year to year due to climatic reasons and randomness of cloud behavior. This work evaluates how mission profile length affects the system-level reliability of a 5.5 kW PV inverter. Different mission profile lengths (1–5 years) are compared to the typical average year (TAY) mission profile. The results indicate that the use of 1 year mission profile affects by 7% the estimated inverter B10 lifetime.
Abstract
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Geração de energia fotovoltaica
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Lifetime of a photovoltaic inverter is estimated using mission profile based approach and physics of failure models; The impact of the mission profile data length (in years) in the estimated lifetime is evaluated; The real data measurements with different lengths (1-5 years) are benchmarked with the typical average year mission profile. The typical average year mission profile results in an overestimation of the inverter lifetime in approximately 32%. Different lengths can affect the lifetime estimation in approximately 7%., Photovoltaic systems, Mission profile, Lifetime estimation, System-level reliability
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https://www.sciencedirect.com/science/article/pii/S0026271419305438