Yaqoob Salam J, Saleh Ameer L, Motahhir Saad, Agyekum Ephraim B, Nayyar Anand, Qureshi Basit
Authority of the Popular Crowd, Baghdad, Iraq.
College of Engineering, Misan University, Amarah, Iraq.
Sci Rep. 2021 Sep 27;11(1):19153. doi: 10.1038/s41598-021-98593-6.
A photovoltaic (PV) module is an equipment that converts solar energy to electrical energy. A mathematical model should be presented to show the behavior of this device. The well-known single-diode and double-diode models are utilized to demonstrate the electrical behavior of the PV module. "Matlab/Simulink" is used to model and simulate the PV models because it is considered a major software for modeling, analyzing, and solving dynamic system real problems. In this work, a new modeling method based on the "Multiplexer and Functions blocks" in the "Matlab/Simulink Library" is presented. The mathematical analysis of single and double diodes is conducted on the basis of their equivalent circuits with simple modification. The corresponding equations are built in Matlab by using the proposed method. The unknown internal parameters of the PV panel circuit are extracted by using the PV array tool in Simulink, which is a simple method to obtain the PV parameters at certain weather conditions. Double-diode model results are compared with the single-diode model under various irradiances and temperatures to verify the performance and accuracy of the proposed method. The proposed method shows good agreement in terms of the I-V and P-V characteristics. A monocrystalline NST-120 W PV module is used to validate the proposed method. This module is connected to a variable load and tested for one summer day. The experimental voltage, current, and power are obtained under various irradiances and temperatures, and the I-V and P-V characteristics are obtained.
光伏（PV）模块是一种将太阳能转换为电能的设备。应提出一个数学模型来展示该设备的性能。利用著名的单二极管和双二极管模型来演示光伏模块的电气性能。“Matlab/Simulink”被用于对光伏模型进行建模和仿真，因为它被认为是用于建模、分析和解决动态系统实际问题的主要软件。在这项工作中，提出了一种基于“Matlab/Simulink库”中的“多路复用器和函数块”的新建模方法。基于单二极管和双二极管的等效电路进行简单修改后进行数学分析。使用所提出的方法在Matlab中建立相应的方程。通过使用Simulink中的光伏阵列工具提取光伏面板电路的未知内部参数，这是在特定天气条件下获取光伏参数的一种简单方法。在各种辐照度和温度下，将双二极管模型的结果与单二极管模型的结果进行比较，以验证所提出方法的性能和准确性。所提出的方法在I-V和P-V特性方面表现出良好的一致性。使用一个120W的单晶NST光伏模块来验证所提出的方法。该模块连接到可变负载，并在一个夏日进行测试。在各种辐照度和温度下获得实验电压、电流和功率，并获得I-V和P-V特性。
