Parameter Estimation of a DDM PV Module Using a Simplistic Novel Method

This paper describes a novel method to estimate the five parameters ($R_{s}, I_{ph}, I_{o1}, I_{o2}$, and Rsh) of double diode model (DDM) of a photovoltaic (PV) module. For estimations of the parameters $I_{o1}, I_{o2}$, and Rsh, three new explicit expressions are derived. The value of parameters $R_{sh}, I_{o1}$ and Io2 are obtained from the proposed explicit expressions by putting the value of independent parameters Rs and Iph. Further, modified bisection method is utilized to find the error between the estimated maximum power point (MPP) voltage and MPP voltage given by the manufacturer. The root mean square (RMS) error of the estimated parameters using the proposed method is compared with different existing methods. The main contribution of the paper is three accurate explicit expressions of three dependent parameters in terms of two suitable independent parameters for DDM of a PV module. Since this novel method is simple and accurate for parameter estimation of a DDM PV module. Hence, it is useful for the PV professional.