Analysis of Output Characteristics of Photovoltaic Array under Time-varying Shadow

2018 1st International Conference on Environment Prevention and Pollution Control Technology

生态环境科学

Zhou, Tianpei^1 ; Ji, Zhi^1 ; Zhan, Xinsheng^1

School of Mechatronic Engineering, Xuzhou College of Industrial and Technology, Xuzhou

221140, China^1

关键词: Extreme points;    Maximum Power Point Tracking;    Mppt algorithms;    Output characteristics;    Photovoltaic arrays;    Research results;    Surrounding buildings;    Time varying;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/199/5/052008/pdf
DOI  :  10.1088/1755-1315/199/5/052008

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The Photovoltaic (PV) array is often obscured by moving clouds, surrounding buildings, and so on. That results in the formation of partial shadow in the PV array, which leads to the multi-peak characteristics of the PV array to make the traditional maximum power point tracking (MPPT) method invalid. Therefore, it is necessary to explore and analyze the output characteristics of the PV array under partial shadows in order to improve the effectiveness and accuracy of MPPT. Partial shadow is divided into static shadow and time-varying shadow. In this paper, the output characteristics of the PV array under time-varying shadow are mainly studied. The motion of the extreme points during the process of shadow variation is obtained. These research results lay the foundation for the following MPPT algorithm.