A simple approach to extract the unknown parameters of PV modules

Abstract

are not provided by most manufacturers. Since these parameters are crucial for PV module characterization, our study presents an exact, closed-form expression for Rs that is solvable numerically while increasing the value of the ideality factor ( a) in small increments, so that four equations are formulated to compute the unknown parameters. To validate the proposed approach, a set of I − V curves were computed for different values of a , and these results were compared alongside corresponding reference data for the BP SX150 and MSX60 PV modules. Average RMS errors of 0.035 for BP SX150 and 0.014 for MSX60 between the reference data and the computed data suggest that proposed approach could be used as an alternative method to quantify important missing parameters required for characterization of PV modules.

Single-diode Models of PV Modules: A Comparison of Conventional Approaches and Propose a Novel Model

“…After that, the following five equations, eqs. (11) to (15), are proposed to calculate model parameters but do not refer to any explanations about these equations.…”

“…But in Celik model [16], the authors just estimated only two values of the open-circuit voltage and short-circuit current, using eqs. (15) and (16). Since some datasheets do not provide the coefficient of the MPP, the current and voltage at the MPP can not be scaled, which also means the diode ideality factor can not be estimated.…”

“…Although these models impose no restrictions on the problem formulation [11], metaheuristic algorithms might take long computational time and convergence difficulty. Meanwhile, in [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][29][30][31][32][33][34][35], analytics methods utilize a set of mathematical equations and assumptions from the datasheet provided by manufacturers. The trade-off between model accuracy and computational time makes the analytics methods much popular in engineering applications than metaheuristic methods.…”

“…Different methods have been proposed to extract five parameters of the SDM. In [12][13][14][15][16][17][18][19][20][21], a set of implicit equations accompanied by assumptions and simplifications were used to formulate the equations obtaining the model parameters.…”

“…Meanwhile, model parameters were identified by using mathematical manipulations in [14,15,[23][24][25][26]. Specifically, Lambert-W function at five experimental points was applied in [14,15,[24][25][26].…”