Modelling of Photovoltaic Generators Based on a Linarized Equivalnet Circuit

In this paper, a new method on modeling of PV generators, for association with electromagnetic software programs, is proposed. The application of a linearization process, on nonlinear and well-tested current-voltage equations using Taylor’s scheme, leads to uncoupling of the current and voltage quantities in each time step of a digital simulation. This uncoupling is represented by a linearized equivalent electrical circuit. Using the proposed equivalent photovoltaic generator circuit, the application of nodal analysis on equivalent resistive circuits derives a photovoltaic system model of linear algebraic equations. This remarkably simplifies photovoltaic systems modeling because one can develop a photovoltaic generator element in electromagnetic transient programs for power systems analysis.