Comparison of curve correction procedure of current and voltage as per IEC 60891 for thin film technology

The performance of PV module is compared through measuring I-V characteristics at STC. But usually in the real outdoors the PV module behaves differently. To estimate the power and energy rating under different climatic conditions, I-V curves are extrapolated by applying corrections. In this paper we have examined I-V curve's correction procedure as per IEC 60891 for different temperature and irradiance conditions of three thin film PV technologies viz. CIGS, CdTe, Micro-morph, and a comparison is made with measured data in real outdoor conditions. Deviations from estimated and measured output for three different correction procedures are compared. The correction procedure 3 gives the best results as compared to procedure 1 & procedure 2.