Identification of solar cell model parameters by combining analytical method with Nelder-Mead simplex method

By combining an approximate analytic method and the Nelder-Mead simplex method (NM), an comprehensively hybrid algorithm named A-bcNM is proposed in this paper to simultaneously determine the precise values of photo-generated current, diode saturation currents, parasitic series and shunt resistances, and diode ideality factors of solar cell models. In the A-bcNM method, the parameter identification problem of solar cell models is formulated as a bounded, multidimensional, nonlinear optimization problem of minimizing a given objective function. The identification results indicate that the simulation data with the parameters obtained by A-bcNM method are in very good agreement with the experimental data in all cases. In short, simple concept, easy implementation and high performance are the main advantages of the A-bcNM method, and it is useful for PV systems designers to build an efficient and accurate solar cell system simulator.