Non-Iterative Performance Analysis of PV Systems under Various Resistive Load Conditions

The I-V characteristics of a solar cell, modeled using the widely adopted single-diode representation, exhibit nonlinear and implicit behavior, necessitating iterative numerical techniques to accurately compute the complete curve. This study presents a simplified explicit I-V model using the Lambert W method, which provides an efficient alternative to simulate solar cell performance. These explicit models are particularly advantageous for system-level simulations and real-time applications in photovoltaic (PV) systems, offering faster computation. The voltage-current (V-I) and power-voltage (P-V) characteristics of the PV system are simulated under varying irradiance conditions. The primary goal of this work is to implement Lambert W method to analyze the performance with different series(s) × parallel(p) PV configurations. The impact of varying load conditions on the PV characteristics and the accuracy of the proposed method is evaluated by comparing it with conventional iterative techniques, fzero and fsolve.