PV cell modeling on single-diode equivalent circuit

PV cell model is necessary both for software and hardware simulators in analyzing and testing the performance of PV generation systems. To get the characteristic non-linear I-V Curve of a PV cell, 5 characteristic parameters R_s, R_sh, I₀ and v_t should be extracted from the three remarkable operation points of the manufacture´s datasheets, I_sc, V_oc, IMPP and V_MPP. This paper analyzes conventional three representative PV modeling algorithms by comparison, and proposes a novel PV modeling algorithm which is fast, accurate and applicable to all kinds of PV cells such as Cr-Si type and thin-film type PV cells. Proposed theory is verified by simulations for various PV cell types such as Cr-Si type and thin-film type PV cells.