A novel datasheet-based parameter extraction method for a single-diode photovoltaic array model

摘要

This paper presents an effective parameter extraction algorithm for photovoltaic (PV) panels based only on datasheet values, which is very useful in the development phase of a power conditioning system (PCS). In order to increase the accuracy of a PV circuit model, especially in the vicinity of the maximum power point (MPP), the objective function incorporating the MPP error is formulated in the single-diode model, and a pattern search algorithm is utilized to optimize the parameters. In addition, the parameter search region and initial value are also discussed and criteria for the model accuracy in the MPP region are established. Comparison study using measurement data from the crystalline PV panel shows that the proposed method is a more accurate, uniform, and faster method of parameter extraction that is less dependent on the panel type and user skill. Furthermore, with a simple modification, this method successfully describes the PV characteristics even for various temperatures and irradiation levels in addition to the standard test condition (STC). (C) 2015 Elsevier Ltd. All rights reserved.