Use of Parameter Extraction Techniques for the Evaluation of the Performance of CdTe Based Solar Array

Abstract

Two mathematical models are used for parameter extraction of a CdTe based Photovoltaic (PV) array that delivers a maximum output power of 50 kW. The two sets of extracted parameters are used to design the array and the non-linear coupled equations representing the I–V and P–V equations of the equivalent array structure have been solved using Bisection method and Newton Raphson methods respectively. The performance of the designed array using the extracted parameters under Standard Test Condition (STC) as well as varying temperature and irradiance levels is observed. A detailed comparative analysis of the designed array using both the models is done to monitor the change in Fill Factor (FF), efficiency (η) and Maximum Power Point (MPP) under STC and variable temperature and irradiance conditions by including the loss resistances RS and RP in the equivalent circuit of the designed PV array module.