Lifetime Estimation Method for Photovoltaic Generators
Abstract
This article addresses a methodology to evaluate the lifetime of photovoltaic generators (PVGs) by extracting parameters from a Weibull distribution and using the Akaike criterion test. A degradation index is developed for outdoor photovoltaic generators affected by operating conditions. Degradation index quantification, through weather monitoring and instantaneous continuous output power, is proposed. For this purpose, statistical data series are extracted that correspond to the instantaneous number of contributing PVGs, which allows a reliability study. Akaike Criterion Test (AIC) shows that these data series tend towards a Weibull distribution. Efforts are made to be able to quantify the parameters of the distribution model and thereby obtain the lifetime of the PVG. The approach is validated by using data from several PVGs.
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URN: https://sloi.org/urn:sl:tjoee41129
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