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Explicit model of PV cells considering variations in temperature and solar irradiance

Abstract:

This paper presents a direct and approximate model of PV cell that considers variations in surrounding temperature and solar irradiation. The method uses the one diode model approximation and PV parameters from the manufacturer's data, together with a selective (first or second order) Taylor series. In this paper, a recursive solution for the PV cell's complete implicit model equations supplies data supporting the proposed approximate method results. The proposed model allows adjustment of the MPPT algorithm to simplify in real time the inverter control algorithm. It also provides a way to find the temperature and solar irradiation or errors produced by nonuniform irradiation on the solar panels.