A New Strategy for Accurately Predicting<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mi>I</mml:mi><mml:mtext>-</mml:mtext><mml:mi>V</mml:mi></mml:math>Electrical Characteristics of PV Modules Using a Nonlinear Five-Point Model

Abstract

This paper presents the modelling of electrical<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M2"><mml:mi>I</mml:mi><mml:mtext>-</mml:mtext><mml:mi>V</mml:mi></mml:math>response of illuminated photovoltaic crystalline modules. As an alternative method to the linear five-parameter model, our strategy uses advantages of a nonlinear analytical five-point model to take into account the effects of nonlinear variations of current with respect to solar irradiance and of voltage with respect to cells temperature. We succeeded in this work to predict with great accuracy the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M3"><mml:mi>I</mml:mi><mml:mtext>-</mml:mtext><mml:mi>V</mml:mi></mml:math>characteristics of monocrystalline shell SP75 and polycrystalline GESOLAR GE-P70 photovoltaic modules. The good comparison of our calculated results to experimental data provided by the modules manufacturers makes it possible to appreciate the contribution of taking into account the nonlinear effect of operating conditions data on<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M4"><mml:mi>I</mml:mi><mml:mtext>-</mml:mtext><mml:mi>V</mml:mi></mml:math>characteristics of photovoltaic modules.