6533b821fe1ef96bd127acaa

RESEARCH PRODUCT

Series resistance determination and further characterization of c-Si PV modules

Ole-morten MidtgardGeorgi Hristov YordanovGeorgi Hristov YordanovTor Oskar Saetre

subject

Materials scienceEquivalent series resistanceRenewable Energy Sustainability and the EnvironmentSaturation currentEstimation theoryOpen-circuit voltageElectronic engineeringBiological systemCharacterization (materials science)

description

Abstract This paper presents a new algorithm for determination of the series resistance of crystalline-Si PV modules from individual illuminated I–V curves. The ideality factor and the reverse saturation current are then extracted in the classic way. The approach is applied to in-situ measured data from modules based on two types of mc-Si feedstock. The results indicate that the method yields physically meaningful parameters. An improved definition of local ideality factor is suggested, resulting in m-V plots unaffected by the series resistance. In addition, m-I plots are introduced for the first time. The novel differential techniques reveal an unexpected rise of the ideality factor at open circuit by about 5%.

yearjournalcountryeditionlanguage
2012-10-01Renewable Energy
https://doi.org/10.1016/j.renene.2012.03.012